U.S. Route 101 in California

Last updated

US 101 (CA).svg
U.S. Route 101
U.S. Route 101 in California
US 101 highlighted in red
Route information
Maintained by Caltrans
Length808.111 mi [1]  (1,300.529 km)
Portions of US 101 have been relinquished to or are otherwise maintained by local or other governments, and are not included in the length.
ExistedNovember 11, 1926 (1926-11-11) [2] [3] –present
Tourist
routes
Major junctions
South endI-5 (1961).svgI-10 (1961).svgCalifornia 60.svg I-5  / I-10  / SR 60 in Los Angeles
Major intersections
North endUS 101.svg US 101 at Oregon state line near Brookings, OR
Location
Counties Los Angeles, Ventura, Santa Barbara, San Luis Obispo, Monterey, San Benito, Santa Clara, San Mateo, San Francisco, Marin, Sonoma, Mendocino, Humboldt, Del Norte
Highway system
California 100.svg SR 100 California 103.svg SR 103

U.S. Route 101 (US 101) is a major north–south United States Numbered Highway, stretching from Los Angeles, California to Tumwater, Washington. The California portion of US 101 is one of the last remaining and longest U.S. Routes still active in the state, and the longest highway of any kind in California. [6] US 101 was also one of the original national routes established in 1926. Significant portions of US 101 between the Los Angeles area and the San Francisco Bay Area follow El Camino Real, the commemorative route connecting the former Alta California's 21 missions.

Contents

Although the highway has been superseded in overall importance for transportation through the state by Interstate 5 (I-5), US 101 continues to be the major coastal north–south route that links the Greater Los Angeles Area, the Central Coast, the San Francisco Bay Area, and the North Coast (Redwood Empire). Generally referred to as "101" by residents of Northern California, in Southern California it is often called "The 101" (pronounced "the one oh one"). [7] The highway has portions designated as the Santa Ana Freeway, the Hollywood Freeway, the Ventura Freeway, South Valley Freeway, and Bayshore Freeway, as well as El Camino Real in many non-freeway segments. The Redwood Highway, the 350-mile-long (560 km) northernmost segment of the highway, begins at the Golden Gate and passes through the world's tallest and only extensive preserves of virgin, old-growth coast redwood trees.

Route description

US 101 is part of the California Freeway and Expressway System, [8] and is part of the National Highway System, [9] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration. [10]

Portions of US 101 are eligible to be included in the State Scenic Highway System. [11] It is officially designated as a scenic highway by the California Department of Transportation from Goleta to Las Cruces in Santa Barbara County, [4] and through Del Norte Coast Redwoods State Park in Del Norte County. [5] This designation means that there are substantial sections of highway passing through a "memorable landscape" with no "visual intrusions", where the potential designation has gained popular favor with the community. [12]

Los Angeles to Ventura

US 101 northbound as it enters downtown Los Angeles US 101 entering Downtown Los Angeles.jpg
US 101 northbound as it enters downtown Los Angeles

The south terminus of US 101 is in Los Angeles, about one mile (1.6 km) east of downtown Los Angeles at the East Los Angeles Interchange, also known as the "Commuters' Complex". This southernmost portion is named the Santa Ana Freeway, inheriting that title as the northerly extension of the roadway now known as I-5. US 101 heads north for 2 miles (3.2 km) before merging with the western end of the San Bernardino Freeway (I-10).

After merging with westbound traffic from the San Bernardino Freeway (I-10), US 101 then proceeds northwest via the Downtown Slot under the northern edge of Los Angeles' Civic Center to State Route 110 (SR 110) at the Four Level Interchange. From here, US 101 becomes the Hollywood Freeway. It then passes through the L.A. neighborhoods of Echo Park, Silver Lake, and Los Feliz and heads to Hollywood and up through the Cahuenga Pass before reaching the San Fernando Valley.

View northward from the Cahuenga Pass in 1972 HOLLYWOOD FREEWAY NEAR VENTURA BEACH. (FROM THE DOCUMERICA-1 EXHIBITION. FOR OTHER IMAGES IN THIS ASSIGNMENT, SEE... - NARA - 553018.jpg
View northward from the Cahuenga Pass in 1972

US 101 passes right next to the Universal Studios Hollywood and then intersects with SR 134 and SR 170 at the interchange known as the Hollywood Split. Here, the alignment of US 101 shifts to the alignment of SR 134 (i.e. heading northbound, the road's alignment turns left, or westbound) and thereafter is referred to as the Ventura Freeway until it reaches Ventura. Though confusing, the "Hollywood Freeway" name continues northward from this interchange on SR 170, and the "Ventura Freeway" name continues eastward to SR 134.

From the Hollywood Split, US 101 is an east–west highway (until it reaches Gaviota State Park in Santa Barbara County where it shifts back to a north–south alignment). It meets with I-405 in Sherman Oaks, an interchange which holds claim to the most traveled intersection in the nation.[ citation needed ] The east–west geographical alignment of the Ventura Freeway and the north–south designation which appears on the freeway signs can be confusing to visitors; the same freeway entrance can often be signed as "101 North" and "101 West"; this is most common in the San Fernando Valley where the local E/W signing does not match the Caltrans' proper statewide N/S designation.

After the Conejo Grade, which is a 7% grade incline, the freeway enters the Oxnard Plain and runs concurrent with SR 1 for the first time. Upon reaching Ventura, there is an interchange with SR 126, which runs east to Santa Clarita.

Central Coast

US 101 northbound approaching Gaviota Tunnel through the Santa Ynez Mountains UShwy101GaviotaRestArea.png
US 101 northbound approaching Gaviota Tunnel through the Santa Ynez Mountains

North of Santa Barbara, US 101 switches intermittently between freeway and expressway status (i.e. there is occasional cross-traffic), but there are no traffic signals until San Francisco. The last traffic signals along this stretch of the route were removed in 1991 when the section through downtown Santa Barbara was constructed to freeway standards after years of disagreement over the impact that the original elevated design would have on the community. [13]

From Ventura and through Santa Barbara, US 101 closely follows the Gaviota Coast (generally no more than one to two miles [1.6 to 3.2 km] from the shore) until Gaviota State Park, about 23 miles (37 km) west of Goleta. At Gaviota State Park, the highway shifts back from an east–west highway to a north–south alignment. About one mile (1.6 km) north of this point, the northbound lanes pass through the Gaviota Tunnel.

A few miles north of the Gaviota Tunnel, SR 1 splits from US 101 and heads northwest, running along the Pacific coastline parallel and to the west of US 101. US 101 passes through Buellton, Los Alamos, Orcutt, Santa Maria, and Nipomo. South of Santa Maria, US 101 widens from a four-lane highway to a six-lane freeway. SR 166 joins US 101 for about 3 miles (4.8 km) before splitting just north of the city limits, while US 101 continues as a four-lane freeway before reverting to expressway status north of Nipomo.

Farther north, SR 1 rejoins US 101 between Pismo Beach and San Luis Obispo. Then US 101 takes an inland route through the Salinas Valley, while Highway 1 heads northwest, running along the Pacific coastline in California, parallel and to the west of US 101.

Downhill (southbound) view of Cuesta Grade north of San Luis Obispo 101DescendingCuestaGrade.png
Downhill (southbound) view of Cuesta Grade north of San Luis Obispo

A steep segment (7% grade) between San Luis Obispo and Atascadero is known as the Cuesta Grade. North of Atascadero, the highway joins SR 46 for about three miles (4.8 km) through Paso Robles.

From Paso Robles to Salinas, US 101 is an expressway known as the Salinas River Valley Highway, since the Salinas River Valley extends from Santa Margarita to the SR 156 junction in Prunedale. US 101 resumes freeway status between San Miguel and King City, bypassing the smaller towns of Camp Roberts, Bradley, and San Ardo, as well as the San Ardo Oil Field about five miles (8.0 km) south of San Ardo. Near this point, the wide agricultural bottomlands of the Salinas Valley begins. North of King City, US 101 once again switches intermittently between freeway and expressway status, passing through Greenfield, Soledad, Gonzales, and Chualar before reaching Salinas. Shortly after leaving Salinas, US 101 joins SR 156 in Prunedale for about eight miles (13 km). After crossing the San Benito County line, SR 156 splits from US 101 near San Juan Bautista while US 101 continues northward mostly as a four-lane highway until it reaches Gilroy.

US 101 sign in San Francisco Giway 101.jpg
US 101 sign in San Francisco

San Francisco Bay Area

US 101 in San Francisco between Sacramento and Clay Streets; a Muni ETI Skoda bus can be seen in the background. RearEndOfETISkodaOstrovNumber7102Route49VanNessMission.jpg
US 101 in San Francisco between Sacramento and Clay Streets; a Muni ETI Skoda bus can be seen in the background.

US 101 crosses the Pajaro River into Santa Clara County as a four-lane highway, with an interchange at SR 25 a few miles later. Upon reaching Gilroy, it becomes the South Valley Freeway (as in South Santa Clara Valley), and at the same time, it expands to three lanes in each direction. It then enters Silicon Valley when reaching Morgan Hill, and shortly afterwards expands to four lanes in each direction, with an HOV lane in the middle, before reaching San Jose. From San Jose to San Francisco, US 101 is known as the Bayshore Freeway as it passes through Palo Alto and the other major communities along the San Francisco Peninsula.

The Golden Gate Bridge, which carries US 101 and SR 1 between San Francisco and Marin County Golden gate2.jpg
The Golden Gate Bridge, which carries US 101 and SR 1 between San Francisco and Marin County

US 101 is called the James Lick Freeway, named for James Lick, a philanthropist, from the San Francisco county/city line, through the interchange with I-280 at the Alemany Maze, until the junction with the San Francisco Skyway (I-80) and the Central Freeway near the city's Civic Center. US 101 continues in a northwestern direction on the Central Freeway, and then leaves the freeway, on Mission Street (northbound) and South Van Ness Avenue (southbound), to run north on Van Ness Avenue. At the intersection of Van Ness Avenue and Lombard Street, US 101 heads west on Lombard Street, and then on Richardson Avenue, entering The Presidio, where it becomes a divided highway again (the Presidio Parkway). It is then joined by Route 1 before approaching and crossing the Golden Gate Bridge.

From San Francisco north the highway is heavily traveled by commuters through to Windsor, just north of Santa Rosa. North of the Golden Gate Bridge, US 101 enters Marin County and is known as the Redwood Highway. After crossing the bridge, US 101 climbs the Waldo Grade and passes through the Robin Williams Tunnel, the only one of its kind in 300 miles (480 km) (the other being the Gaviota Tunnel in Santa Barbara County). Upon exiting the tunnel, it passes above the hillside town of Sausalito and descends to Richardson Bay, where SR 1 splits from the freeway and heads to the coast. US 101 then passes through Mill Valley, Corte Madera, Larkspur, San Rafael and Novato, before entering Sonoma County. The section between Novato in Marin County and Petaluma in Sonoma County changes from its original six or eight lanes through Marin to four lanes, creating a bottleneck, and is thus called the "Novato Narrows" by locals. [14] The Narrows continue up to the county line between Marin and Sonoma Counties. The entire area between Novato and Petaluma is also the voter approved Novato–Petaluma Community Separator, which forbids most development. [15]

Upon entering Sonoma County, the freeway widens again to six lanes from the county line to Windsor, passing through Petaluma, Cotati, Rohnert Park, and Santa Rosa. Upon reaching Windsor, the freeway returns to two lanes in each direction, crossing the Russian River in Healdsburg and then following the river up the Alexander Valley. SR 128 joins US 101 in the town of Geyserville before splitting just north of Cloverdale. US 101 then heads up a steep hill just before leaving Sonoma County and entering Mendocino County.

North Coast

US 101 follows the Russian River past Frog Woman Rock in southern Mendocino County CaliforniaSquawRock.png
US 101 follows the Russian River past Frog Woman Rock in southern Mendocino County
Historic US 101 roadside attraction in Ukiah, now bypassed by the freeway WorldsLargestRedwoodTreeServiceStation.jpg
Historic US 101 roadside attraction in Ukiah, now bypassed by the freeway

US 101 crosses into Mendocino County as a freeway for one mile (1.6 km), but then narrows to an expressway through the Russian River canyon and eventually a two-lane road south of Hopland, the first time since leaving San Francisco. Just before reaching Ukiah, US 101 becomes a four-lane freeway. In the community of Calpella, SR 20 merges with US 101 for the next 15.5 miles (24.9 km) to Willits. The freeway portion ends as the combined US 101 and SR 20 ascend the 1,956-foot (596 m) Ridgewood Summit, the highest elevation along the route's 808-mile-long (1,300 km) trek through California. [16] As US 101 resumes freeway status just south of Willits, SR 20 splits from US 101 shortly before it suddenly reverts to a 2-lane undivided freeway and eventually a highway north of Willits.

US 101 then widens to a four-lane expressway until the intersection with the western portion of SR 162, where it reverts to a two-lane road. North of Laytonville, US 101 ascends Rattlesnake summit (1,796 feet or 547 metres) before a descent to follow the South Fork Eel River and Eel River all the way to Fortuna near the mouth of the river. About 12 miles (19 km) northwest of Laytonville, US 101 becomes an undivided freeway near the community of Cummings. SR 271 is the old portion of US 101 through this area. At Leggett, US 101 meets SR 1 for the last time, and from this point until Piercy, US 101 runs along a section of highway with frequent landslides. Caltrans bypassed the most difficult section in 2009 with unique construction of two bridges known collectively as the Confusion Hill Bridges. This project, funded by an emergency act from the State Legislature, moved the highway across the Eel River away from the troubled spots to prevent disruption in commerce and travel from infrequent, but costly, winter closures on the main transportation route to the far North Coast. North of Piercy, the freeway portion again ends and the road narrows down to two lanes, before another stretch of divided highway.

Arriving in Humboldt County, another narrow two lane portion of US 101 bisects Richardson Grove State Park. Just after the park boundary, the highway switches to a short undivided freeway and then eventually a divided freeway just before reaching Garberville. North of Garberville, US 101 reverts to an undivided freeway, which continuing north by northwest, passes through the 53,000-acre (210 km2) Humboldt Redwoods State Park, California's third largest State Park and the site of the largest remaining Redwood old growth forest in the world. A preserved portion of the original, bypassed highway route, known as the Avenue of the Giants for the huge, centuries-old redwood trees, parallels the highway for over 30 miles (48 km) in southern Humboldt County. US 101 again switches to another stretch of divided freeway near the town Pepperwood before reverting to a short, 2-mile (3 km) expressway just north of Stafford. A short freeway then runs through Rio Dell before another short, 3-mile (5 km) expressway.

Shortly before reaching the western terminus of SR 36, US 101 becomes a freeway again between Fortuna and Eureka. North of Humboldt Hill, the road enters the City of Eureka (a potential new freeway cutting through or bypass of the city was successfully blocked repeatedly). As the route traverses Eureka, the southern portion is known as "Broadway" and then as it bears east along Humboldt Bay, the Highway is aligned on a one-way couplet (4th and 5th streets). Five miles (8.0 km) later the highway leaves Eureka's northern city limit and continues north. The expressway style section between Eureka and Arcata, which is also a safety corridor, is named the "Michael J. Burns Freeway," in honor of the State Senator who was a proponent of California's Highways. The highway becomes an unobstructed freeway south of the center of Arcata. Proceeding north it passes the junction for SR 299 (also the western terminus for that route), in the Valley West (northernmost) part of the college town.

Parking adjacent to US 101 along the sandy bar between Freshwater Lagoon and the Pacific Ocean Freshwater Lagoon California.JPG
Parking adjacent to US 101 along the sandy bar between Freshwater Lagoon and the Pacific Ocean

The highway continues north as it skirts westerly around McKinleyville on a high bluff north of the Mad River. As the highway reaches Clam Beach (a county park), motorists get their first magnificent full view of the Pacific Ocean north of the Golden Gate. North of Trinidad, the highway narrows to one lane in each direction after crossing Big Lagoon to pass inland of Stone Lagoon and follow the coastal bar between Freshwater Lagoon and the Pacific Ocean south of Orick. It becomes a 14-mile (23 km) undivided freeway through Redwood National and State Parks running inland east of the Prairie Creek Redwoods State Park boundary. The freeway narrows to one lane in each direction at the Klamath River before losing its freeway designation in Klamath. The original placement of the highway near giant Coast Redwoods led to increased awareness of the destruction of the redwoods after decades of extensive logging, which ultimately led to the establishment of Redwood National Park in 1968. The original highway segment through Prairie Creek Redwoods State Park is now a scenic alternate similar to Avenue of the Giants, named Newton B. Drury Scenic Parkway in honor of the fourth director of the National Park Service and executive director of the Save-the-Redwoods League

Intersection between US 101 and US 199 US 101, US 199 Intersection.JPG
Intersection between US 101 and US 199

North of the town of Klamath just inside Del Norte County, the highway closely follows the Pacific coast again. In Crescent City, US 101 once again separates into a one-way couplet (L and M Streets) for nine blocks. As it leaves Crescent City, US 101 becomes a divided freeway for the last time in California (built slightly to the west of the original two-lane alignment, now called Parkway Drive). As the 3-mile divided freeway portion ends, US 101 intersects the southern terminus of US 199, which heads northeast as the Redwood Highway, passing through the Collier Tunnel and terminating in Grants Pass, Oregon. US 101 (no longer called the "Redwood Highway" at this point) is reduced to two lanes and continues north along the California coast until it reaches the Oregon border.

History

Juan Bautista de Anza National Historic Trail

The US 101 Highway is part of the auto tour route of the Juan Bautista de Anza National Historic Trail, a National Park Service unit in the United States National Historic Trail and National Millennium Trail programs. [17] In 2005, Caltrans began posting signs on roads that overlap with the historic 1776 Juan Bautista de Anza trail route, so that California drivers can now follow the trail.

Historic route: San Diego to Los Angeles

Early narrow concrete pavement survives on some former alignments like this stage route near Mission San Miguel Arcangel was designated US 101 until bypassed in 1938. OldHighway101nearMissionSanMiguelCalifornia.jpg
Early narrow concrete pavement survives on some former alignments like this stage route near Mission San Miguel Arcángel was designated US 101 until bypassed in 1938.

Instead of terminating in Los Angeles, US 101 once continued all the way south through San Diego to the United States–Mexico border in San Ysidro. However, this part was decommissioned on July 1, 1964, in favor of I-5. Though much of U.S. Route 101 has been superseded by I-5, several street segments of former Route 101 exist.

Historic route in San Diego County

Much of the route in northern San Diego County is County Route S21; this includes Coast Highway in Oceanside, Carlsbad Boulevard in Carlsbad, Coast Highway 101 in Encinitas, Camino del Mar in Del Mar, and Torrey Pines Road in Torrey Pines. In San Diego, one alignment entered La Jolla Village on La Jolla Blvd, while a newer alignment went through Rose Canyon under what is now I-5. Roads followed by US-101 in San Diego included Mission Bay Drive, Pacific Hwy, Harbor Drive and Main Street. It ran along National City Blvd in National City, Broadway in Chula Vista and Beyer Blvd in San Ysidro.

Oceanside–Carlsbad freeway bypass

By the early 1950s, traffic had become very heavy on US 101 through Oceanside and Carlsbad. The US 101 freeway bypass (Oceanside-Carlsbad freeway bypass) was built in 1953 and completed in 1955 by the California Department of Public Works (now Caltrans) and brought up by the San Diego Highway Development Association on a US 80/US 101 discussion on how to resolve the huge traffic loads on US 101 in Oceanside. Today it is part of I-5 and Palomar Airport Road. It follows I-5 from Coast Highway (former Hill Street exit) in Oceanside to Palomar Airport Road in Carlsbad. From there the US 101 bypass went onto Palomar Airport Road to merge with US 101 Bus. on Carlsbad Boulevard. As it approached the Coast Highway/SR 76 exit on southbound I-5 in Oceanside, US 101 Bus. split off. US 101 Bus. followed the original US 101 through downtown Oceanside and Carlsbad as former Hill Street/Carlsbad Boulevard (CR S-21) while the US 101 freeway followed modern I-5 and Palomar Airport Road. The south end of the freeway bypass is Carlsbad Boulevard and Palomar Airport Road and the north end is I-5 and the Coast Highway/SR 76 exit. The south end was modified after US 101 was decommissioned between the East Los Angeles Interchange in Los Angeles and the Mexican border in San Ysidro. This freeway construction by the California Department of Public Works put US 101 on an all new highway route alignment to relieve Oceanside and Carlsbad of their very heavy bumper-to-bumper burdensome traffic problem. Also before the bypass in the 1950s, US 101 followed North Coast Highway (formerly Hill Street) from San Luis Rey Mission Expressway (SR 76 and north end of the Oceanside–Carlsbad freeway bypass) to Harbor Drive. From there it followed Harbor Drive to Vandergrift Boulevard, San Rafael Drive, and the freeway onramp for I-5 north near the Camp Pendleton north entrance guardhouse gate. It merges with the I-5 northbound onramp to shoot onto the southbound lanes of I-5 to follow the freeway lanes all the way to Las Pulgas Road in Camp Pendleton.

Historic route in Orange and Los Angeles Counties

An old orphaned alignment of US 101, that ran through the cities of Mission Viejo, Laguna Niguel, San Juan Capistrano, Dana Point, and San Clemente, was located in south Orange County. The old roadway, from a dead end just west of I-5 and east of the railroad tracks in Mission Viejo to Cristianitos Road in San Clemente, followed Camino Capistrano, Doheny Park Road, Coast Highway and El Camino Real. It had interchanges with I-5 and California State Route 1. It was replaced by the San Diego freeway (which US 101 became part of it in 1958) and finally replaced by I-5 in 1968.

In northern Orange County, US 101 followed Harbor Boulevard. U.S. Route 101 left Orange County, traversed southeast Los Angeles County, and entered the City of Los Angeles along Whittier Boulevard.

El Camino Real: Los Angeles to San Francisco

Distinctive route markers with symbolic mission bell and shepherd's crook are seen between Los Angeles and San Jose ElCaminoReal.png
Distinctive route markers with symbolic mission bell and shepherd's crook are seen between Los Angeles and San Jose

Significant portions of US 101 from its southern terminus to the San Francisco Bay Area is designated as the Royal Road or El Camino Real. The route roughly follows the historic trail that connected the former Alta California's 21 missions.

Ferryboat Eureka at Hyde Street Pier with US 101 sign San Francisco (5765732935).jpg
Ferryboat Eureka at Hyde Street Pier with US 101 sign

Before the Golden Gate Bridge was completed in 1937, there was regular vehicle ferry service across the Golden Gate strait, running from the Hyde Street Pier to Sausalito. Under the California Streets and Highways Code § 401, the Golden Gate Bridge is legally not part of US 101. The portion of US 101 starting from Los Angeles ends at "the approach to the Golden Gate Bridge" and then resumes at "a point in Marin County opposite San Francisco" to the Oregon state line. The bridge itself is maintained by the Golden Gate Bridge, Highway and Transportation District instead of Caltrans.

From the 1940s to 1991, various segments of US 101 between Los Angeles and San Francisco were upgraded to either a freeway or expressway. In the Los Angeles area, the first segment of the Hollywood Freeway through the Cahuenga Pass opened in 1940, while the segment from the San Fernando Valley to Downtown Los Angeles opened in 1954, replacing Cahuenga Boulevard. [18] The Ventura Freeway then opened in 1960, replacing Ventura Boulevard. [19] The segment of the original two-lane alignment between Emma Wood State Beach north to the Mobil Pier Undercrossing near Sea Cliff, which followed the historic Rincon Sea Level Road, was the re-signed as part of SR 1.

In the San Francisco Bay Area, US 101 was originally divided. US 101W followed the same general right-of-way of today's US 101 through the region, primarily along what was originally signed as Bayshore Boulevard. US 101E then generally followed the right-of-way taken by today's I-880 from San Jose to Oakland, then across the Carquinez Bridge to follow what is now SR 37, joining US 101W. The US 101E designation was removed by the 1940s and became SR 17 (later designated as I-880 and the westernmost section I-580), running from San Jose to Oakland and then across the Richmond–San Rafael Bridge. Meanwhile, Bayshore Boulevard was later redesignated as the US 101A bypass and then eventually upgraded to what is now the Bayshore Freeway. The first stretch that was completed between Redwood City and South San Francisco was the Bay Area's first freeway when it opened in 1947. After the entire Bayshore Freeway was completed in the early 1960s, the old alignment along the peninsula was renumbered and renamed as SR 82/El Camino Real.

Various other freeway or expressway bypasses along the California Central Coast were also built. In 1991, the last traffic signal along US 101 between Los Angeles and San Francisco was taken down in Santa Barbara. [20] The primary control city that is listed on freeway signs along northbound US 101 through the Central Coast region remains San Francisco.

As the result of freeway revolts in San Francisco in the 1950s, a direct freeway connection through the city to the Golden Gate Bridge has never been built. The Central Freeway was completed to extend from the Bayshore Freeway to Turk Street in 1959, [21] [22] before the San Francisco Board of Supervisors voted to remove the remainder of the Central Freeway and most other proposed freeways from the city's highway plan. [23] For decades, southbound traffic on US 101 flowed on the one-way Turk Street from Van Ness Avenue to the Central Freeway, while northbound traffic used the parallel Golden Gate Avenue. After the 1989 Loma Prieta earthquake damaged the structure, the segment of the Central Freeway north of Market Street was replaced with the surface-level Octavia Boulevard; traffic on US 101 was then eventually re-routed to exit south of that at Mission Street/South Van Ness Avenue. With no direct freeway along US 101 through the City of San Francisco, the old US 101E/I-880/I-580 route remains as a faster bypass through the Bay Area.

In the wake of the dot-com bubble expansion, the segment of US 101 between Morgan Hill and San Jose, also known as the Sig Sanchez Freeway, expanded to eight lanes between Cochrane Road and SR 85 exits between 2001 and 2003 and a new interchange at Bailey Avenue, which had been planned since the 1970s, opened in 2004. [24] Originally, the ten-mile segment was only four lanes (it was planned to have six lanes when opened in 1984). [25] The improved segment was to alleviate the consistent congestion that had expanded as far south as Masten Avenue coming from Gilroy, and as far north as Bernal Road coming from San Jose. [26] [27] Traffic now typically only runs slow between the Bailey Avenue and East Dunne Avenue exits.

The interchange at the beginning of I-280 and I-680 in San Jose was constructed years before its completion. The three flyovers, with no on ramps or off ramps connecting them stood at 110-foot-tall (34 m) over US 101 for years in the 1970s (the SR 87/I-280 interchange also had this at the same time). It became the butt of many local jokes. The highlight prank occurred in January 1976, when a 1960 Chevrolet Impala was placed on the highest bridge overnight, where it obviously would be impossible to drive. The following day, San Jose City Councilman Joe Colla was photographed standing next to the car, a photo which was circulated across many newspapers. [28] It has been suggested this stunt nudged the wheels of progress to find the funds to complete the freeway. In 2010, the interchange was named the Joe Colla Interchange. [29]

Redwood Highway: Marin County to Del Norte County

Redwood Highway
Nearest city Klamath, California
Built1900–1949
NRHP reference No. 79000253 [30]
Added to NRHPDecember 17, 1979

An abandoned segment of the Redwood Highway, US 101, located in the Redwood National and State Parks near Klamath was added to the National Register of Historic Places in 1979. [30]

Freeway segments along the Redwood Highway portion of US 101 are not as prevalent as along the Los Angeles-San Francisco route. A notable segment of the old US 101 alignment is SR 254, also known as the Avenue of the Giants, in Humboldt Redwoods State Park. The freeway bypassing this scenic route, surrounded by towering Coast Redwoods, was completed in 1960. [31] Several bridges along the segment of highway running along the Eel River were destroyed during the Christmas flood of 1964.

Construction on a freeway segment bypassing Willits began in 2013. [32] The bypass around Willits remained controversial because the intended route goes through protected wetlands. Construction was halted by US Army Corps of Engineers in June 2014 and work restarted the following month after Caltrans committed to extensive mitigation of the project. [33] [34] The 5.9 mi (9.5 km) bypass around Willits opened to traffic in November 2016. [35] The bypass included a 1.1 mi (1.8 km) viaduct going over a flood plain. [36] The freeway segment cost $459 million to complete, 50% more than what Caltrans first reported when it opened. [37]

The city of Eureka has long resisted a freeway through it. [38]

Future

The proposed Wallis Annenberg Wildlife Crossing is a vegetated overpass spanning the Ventura Freeway and Agoura Road at Liberty Canyon in Agoura Hills. If built, it will be one of the largest urban wildlife crossing in the United States, connecting the Simi Hills and the Santa Monica Mountains over a busy freeway with ten traffic lanes (including exit lanes). [39] [40]

The US 101 Express Lanes are high-occupancy toll lanes (HOT lanes) under construction along US 101 in Santa Clara and San Mateo Counties. Like other Express Lanes in California, solo drivers will be tolled using a variable pricing system based on the time of day. Tolls will be collected using an open road tolling system, and each vehicle will be required to carry a FasTrak transponder with its switch set to indicate the number of the vehicle's occupants (1, 2, or 3 or more). The first segment from near SR 237 in Mountain View to Whipple Avenue in Redwood City is scheduled to open in January 2022. [41] An extension from Whipple Avenue to I-380 in San Bruno is planned to be completed in 2022. [42] They are then planned in 2025 to extend south from SR 237 to I-880 in San Jose. [43]

The Richardson Grove section of US 101 has been proposed for a bypass for many years, but Caltrans conducted a study in 2000 which stated that a bypass was not cost effective and recommended realignment of US 101 within the redwood grove instead to accommodate modern-sized trucks in compliance with the Surface Transportation Assistance Act (STAA). [44] [45]

Major intersections

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see California postmile § Official postmile definitions ). [1] Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.

CountyLocationPostmile
[1] [46] [47]
Exit
[48]
DestinationsNotes
Los Angeles
LA S0.00-38.19
Los Angeles I-5 (1961).svg I-5 south (Santa Ana Freeway south) Santa Ana Southbound exit and northbound entrance; southern end of East Los Angeles Interchange; southern terminus of US 101
Euclid AvenueSouthbound exit and northbound entrance
California 60.svg SR 60 east (Pomona Freeway) / Soto Street Pomona Southbound exit and northbound entrance; northern end of East Los Angeles Interchange proper; SR 60 west exit 1C
S0.001ASeventh StreetSouthbound exit and northbound entrance
Whittier BoulevardNorthbound entrance only
S0.621AFourth StreetNo northbound entrance; signed as exit 1B southbound
S0.911BFirst StreetNo southbound entrance; signed as exit 1C southbound
1C Cesar Chavez Avenue Northbound exit only; was formerly Brooklyn Avenue
S1.33
0.00
1DI-10 (1961).svg I-10 east (San Bernardino Freeway) San Bernardino No southbound entrance, was demolished in 1996 due to seismic issues; [49] [ self-published source? ]; San Bernardino Split portion of the East Los Angeles Interchange; access to I-10 via the San Bernardino Freeway spur; left exit southbound; former western terminus of US 60 / US 70; former US 99 south; former I-110 east (1958–1965)
0.101EMission RoadNo northbound exit
0.622AVignes StreetNorthbound exit and entrance
0.62–
0.82
2A-BAlameda Street Union Station Signed as exit 2A southbound, 2B northbound
0.822B Los Angeles Street No northbound exit
1.102C Spring Street Northbound exit only
1.102C Broadway Southbound exit and northbound entrance
1.403A Temple Street Southbound exit and entrance
1.573California 110.svgTo plate blue.svg
I-110 (1961).svg
SR 110 to I-110 south (Harbor Freeway, Arroyo Seco Parkway) / Grand Avenue Pasadena, San Pedro
Northern end of Santa Ana Freeway; southern end of Hollywood Freeway [50] Four Level Interchange; Grand Avenue not signed southbound; signed as exit 3B southbound; SR 110 exit 24A
2.484A Glendale Boulevard, Echo Park Avenue, Union AvenueUnion Avenue not signed northbound; Echo Park Avenue not signed southbound
2.864BCalifornia 2.svg SR 2 east (Alvarado Street)Southern end of SR 2 overlap
3.345ARampart Boulevard, Benton Way
3.765BSilver Lake Boulevard
4.406A Vermont Avenue
4.856B Melrose Avenue, Normandie Avenue
5.557California 2.svg SR 2 west (Santa Monica Boulevard) / Western Avenue Northern end of SR 2 overlap
6.258A Sunset Boulevard No northbound entrance
6.528B Hollywood Boulevard
6.918C Gower Street
7.069A Vine Street Southbound exit only
7.469B Cahuenga Boulevard  Hollywood Bowl Signed as exit 9A northbound
7.849C Highland Avenue  Hollywood Bowl Former SR 170 south; signed as exit 9B northbound
Cahuenga Pass
9.2211ABarham Boulevard Burbank No southbound exit
9.6011BUniversal Studios BoulevardNo southbound exit; serves Universal Studios Hollywood
10.3412A Lankershim Boulevard  Universal City Serves Universal Studios Hollywood
10.5612B Ventura Boulevard No southbound exit
11.1112C Vineland Avenue Signed as exit 12B southbound
Moorpark StreetNorthbound entrance only
11.8013California 170.svg SR 170 north (Hollywood Freeway north) Sacramento Northbound left exit and southbound left entrance; US 101 north transitions onto Ventura Freeway west; [50] southern end of Hollywood Split; SR 170 south exit 5A
11.6513BCalifornia 134.svg SR 134 east (Ventura Freeway east) Pasadena Southbound exit and northbound entrance; US 101 south transitions onto Hollywood Freeway south; [50] northern end of Hollywood Split; SR 134 west exit 1A
11.8313ATujunga AvenueSouthbound exit and northbound entrance
12.8514 Laurel Canyon Boulevard  Studio City
13.8815 Coldwater Canyon Avenue
14.8916Woodman Avenue
15.9117 Van Nuys Boulevard
16.9418 Sepulveda Boulevard Northbound exit and southbound entrance
17.1719AI-405 (1961).svg I-405 (San Diego Freeway) Santa Monica, Sacramento I-405 exit 63B
17.5019BHaskell AvenueNo southbound entrance
18.6120Hayvenhurst AvenueNorthbound exit and southbound entrance
19.2221 Balboa Boulevard  Encino
20.2322White Oak Avenue
21.2523 Reseda Boulevard
22.2524Tampa Avenue
23.2625Winnetka Avenue Woodland Hills
24.3126ADe Soto Avenue, Serrania AvenueSigned as exit 26 southbound
24.8526BCanoga AvenueNorthbound exit and southbound entrance
25.3427California 27.svg SR 27 (Topanga Canyon Boulevard) / Ventura Boulevard Signed as exits 27A (north) and 27B (south) northbound
25.7627CShoup AvenueNorthbound exit and southbound entrance
26.4528Fallbrook AvenueSouthbound exit only
26.8628Woodlake AvenueNorthbound exit and entrance
27.3629 Mulholland Drive, Valley Circle Boulevard
Calabasas 28.2930Parkway Calabasas
31.0632Las Virgenes Road (CR N1) – Malibu Canyon
31.9233Lost Hills Road
Agoura Hills 32.7934Liberty Canyon Road
Wallis Annenberg Wildlife Crossing (planned to open in 2023 [51] )
33.6935Chesebro Road
35.0436Kanan Road (CR N9)
36.1838Reyes Adobe Road
Westlake Village 37.5439Lindero Canyon Road
Ventura
VEN 0.00-R43.62
Thousand Oaks 0.7040California 23.svg SR 23 south (Westlake Boulevard)Southern end of SR 23 overlap
1.6241Hampshire Road
3.0243ARancho RoadSigned as exit 43B northbound
3.1143BCalifornia 23.svg SR 23 north (Moorpark Freeway) Fillmore, Simi Valley Northern end of SR 23 overlap; signed as exit 43A northbound; SR 23 south exits 12A-B; Simi Valley only seen on northbound side
4.0644Moorpark Road
5.0545Lynn Road
6.1946Ventu Park Road Newbury Park
7.0247ARancho Conejo Boulevard, Borchard RoadSigned as exits 47A (Rancho Conejo Boulevard) and 47B (Borchard Road) northbound
7.8947BWendy Drive Newbury Park Signed as exit 47C northbound
Camarillo 10.7450Camarillo Springs Road Camarillo Grove County Park
12.3052Santa Rosa Road, Pleasant Valley Road
13.7553AFlynn RoadNorthbound signage
Dawson DriveSouthbound signage
13.8553BCalifornia 34.svg SR 34 (Lewis Road)
14.8054Carmen Drive
15.8955Las Posas Road
16.7956Springville Drive
17.7557Central Avenue
Oxnard 19.1759Del Norte Boulevard
20.0860Santa Clara Avenue, Rice Avenue
21.0161Rose Avenue
22.0162ACalifornia 232.svg SR 232 (Vineyard Avenue) Oxnard
22.7362BCalifornia 1.svg SR 1 south (Oxnard Boulevard)Southern end of SR 1 overlap
63AVentura RoadSouthbound exit only
Ventura R23.4563BJohnson DriveSigned as exit 63 northbound
R24.6564Victoria Avenue Channel Islands Harbor
25.9765Telephone RoadNorthbound entrance is via Main Street
26.3966ACalifornia 126.svg SR 126 east (Santa Paula Freeway) Santa Clarita Signed as exit 66 southbound; southbound entrance is via exit 1C from SR 126 west; SR 126 west exit 1A
26.7266BMain Street (US 101 Bus. north)No southbound exit
28.4568Seaward Avenue
29.4569Vista del Mar Drive, Sanjon RoadNorthbound exit and southbound entrance
30.1570ACalifornia Street, Ventura Avenue
30.9170BCalifornia 33.svg SR 33 north (Ojai Freeway) Ojai
31.5071Main Street (US 101 Bus. south)Southbound exit and northbound entrance
R32.7072California 1.svg SR 1 north (PCH) – State BeachesNorthern end of SR 1 overlap; northbound exit and southbound entrance
R38.9878California 1.svg SR 1 south (PCH) Seacliff Southern end of SR 1 overlap
R39.8079 Mussel Shoals Southbound exit and entrance
41.0081 La Conchita Northbound exit and entrance
R43.5783Bates Road
VenturaSanta Barbara
county line
Northwestern end of Ventura Freeway [50]
Santa Barbara
SB R0.00-90.99
Carpinteria R0.6384California 150.svg SR 150 east Ojai, Lake Casitas
1.6185Bailard Avenue
2.6486ACasitas Pass RoadSigned as exit 86 northbound
3.0686BLinden AvenueSouthbound exit and northbound entrance
3.7787AReynolds Avenue, Santa Monica RoadSigned as exit 87 northbound
4.3487BCarpinteria AvenueSouthbound exit only
Toro Canyon R5.2888Padaro Lane, Santa Claus Lane
Summerland R7.1490Padaro Lane Summerland
R8.2691Evans Avenue Summerland
Montecito 9.0092Sheffield Drive
10.0293San Ysidro Road
10.5494AOlive Mill Road, Coast Village RoadNo northbound entrance
Santa Barbara 11.1094BHermosillo RoadNorthbound exit only
11.4194CCabrillo Boulevard, Coast Village RoadNo southbound entrance; signed as exit 94B southbound
95Los Patos Way (unsigned)Southbound exit only
12.1095Salinas StreetNorthbound exit and entrance
12.7596Milpas StreetFormer SR 144; northbound exit signed as exit 96A; southbound as exits 96B and 96A
13.4996Laguna Street, Garden Street Downtown Santa Barbara Laguna Street/Garden Street northbound exit signed as exit 96B; Garden Street southbound exit signed as exit 96C
R14.1997Bath Street, Castillo Street; Santa Barbara Harbor
R14.7698ACarrillo Street Downtown Santa Barbara Signed as exit 98 southbound
15.2698BArrellaga StreetNorthbound exit and entrance
R15.7399AMission StreetSigned as exit 99 southbound
16.0599BPueblo StreetNorthbound exit only
16.55100Las Positas RoadFormer SR 225
17.78101ALa Cumbre Road, Hope Avenue
18.38101BCalifornia 154.svg SR 154 west / State Street Cachuma Lake
Eastern Goleta Valley 18.92102El Sueno RoadNorthbound exit and entrance
20.06103Turnpike Road
Goleta 21.15104APatterson AvenueSigned as exit 104 southbound
21.41104BCalifornia 217.svgAirport Sign.svg SR 217 west Airport, UCSB Northbound exit and southbound entrance
22.53105Fairview Avenue
23.72107Los Carneros Road
24.77108Glen Annie Road, Storke Road
26.91110Winchester Canyon Road, Hollister AvenueAll ramps are via Cathedral Oaks Road
Northern end of freeway
Southern end of freeway
30.06113Dos Pueblos Canyon Road
Northern end of freeway
Southern end of freeway
32.84116El Capitan Ranch Road
33.85117 El Capitan State Beach
36.62120Refugio Road Refugio State Beach
Northern end of freeway
Gaviota 44.82128Mariposa ReinaInterchange
Gaviota State Beach (Gaviota Beach Road)At-grade intersection
Gaviota Pass 46.30–
46.90
Gaviota Rest Area
47.19 Gaviota Gorge Tunnel (northbound only)
Southern end of freeway
Las Cruces R48.85132California 1.svg SR 1 north Lompoc, Vandenberg AFB Northern end of SR 1 overlap
Northern end of freeway
Southern end of freeway
Buellton R56.46139Santa Rosa Road
R57.12140ACalifornia 246.svg SR 246  Lompoc, Solvang
R57.55140BMcMurray Road, Avenue of the Flags
Northern end of freeway
Southern end of freeway
62.67146California 154.svg SR 154 east / Zaca Station Road Los Olivos, Cachuma Lake
Northern end of freeway
Southern end of freeway
Los Alamos 70.92154California 135.svg SR 135 north Los Alamos, Vandenberg AFB
Northern end of freeway
Southern end of freeway
78.69161Solomon Summit Undercrossing
Orcutt 82.18165Clark Avenue Orcutt
83.42166Union Valley Parkway
Santa Maria 84.36167Santa Maria Way (US 101 Bus. north)
86.59169Betteravia Road Sisquoc
87.60170Stowell Road
88.60171California 166.svg SR 166 west (Main Street) Santa Maria, Guadalupe Southern end of SR 166 overlap
89.69172Donovan Road
90.75173California 135.svg SR 135 south (Broadway, US 101 Bus. south) Santa Maria
San Luis Obispo
SLO 0.00-R69.32
0.81175California 166.svg SR 166 east Maricopa, Bakersfield Northern end of SR 166 overlap
Nipomo 4.85179Tefft Street Nipomo
6.43180Willow Road
7.84182Thompson Road, Los Berros Road
Northern end of freeway
Southern end of freeway
Arroyo Grande 12.52186Traffic Way (US 101 Bus. north), Fair Oaks AvenueNo northbound entrance
13.17187ACalifornia 227.svg SR 227 north (Grand Avenue, US 101 Bus. south)
13.75187BBrisco Road, Halcyon Drive
Pismo Beach 14.61188Oak Park Road
15.58–
15.88
1894th Street, Five Cities DriveSigned as exits 189 (4th Street) and 190A (Five Cities Drive) southbound
16.62190Price Street (US 101 Bus. north)No northbound entrance; northbound signage
190BHinds Avenue, Price Canyon RoadNo northbound entrance; southbound signage
16.89191AWadsworth AvenueNorthbound signage; northbound entrance via Bello Street, southbound entrance via Price Street
California 1.svg SR 1 south Pismo Beach Southbound signage; north and south entrances via Price Street
17.76191BShell Beach RoadNorthbound signage
Price Street (SR 1 south, US 101 Bus. south)Southern end of SR 1 overlap; southbound signage
R19.81193Spyglass DriveNorthbound signage
Shell Beach RoadSouthbound signage
Avila Beach R21.11195Avila Beach Drive
R22.29196San Luis Bay Drive See Canyon, Avila Beach
R24.30198Higuera Street
San Luis Obispo 25.91200ALos Osos Valley RoadSigned as exit 200 southbound
26.83200BPrado Road, Elks LaneNorthbound exit and entrance
27.50201California 227.svg SR 227 south (Madonna Road)
28.07202AMarsh Street
28.81202BBroad Street
29.08203AOsos Street, Santa Rosa Street
29.08203BCalifornia 1.svg SR 1 north Morro Bay, Hearst Castle Northern end of SR 1 overlap
29.40203CCalifornia Boulevard
29.77203DGrand Avenue Cal Poly Northbound exit and southbound entrance
29.99204Monterey StreetNo southbound entrance
Northern end of freeway
Southern end of freeway
37.85211California 58.svg SR 58 east Santa Margarita
Atascadero 42.27216ASanta Barbara RoadSigned as exit 216 southbound
42.90216BSan Diego WayNorthbound exit and southbound entrance
44.01218ASanta Rosa Road
44.84218BCurbaril Avenue
45.57219California 41.svg SR 41 (Morro Road)
45.96220ATraffic Way (US 101 Bus. north)
46.87220BSan Anselmo Road
48.33222Del Rio Road (US 101 Bus. south)
49.32223San Ramon Road, Santa Cruz Road
Templeton 50.64224Vineyard Drive (US 101 Bus. north)
51.45225Las Tablas Road
52.44226Main Street (US 101 Bus. south)
Paso Robles 53.89228California 46.svg SR 46 west Cambria, Hearst Castle Southern end of SR 46 overlap
55.67229Spring Street (US 101 Bus. north)Northbound exit and southbound entrance; former US 101
56.14230Pine StreetSouthbound exit and entrance
230Paso Robles StreetNorthbound exit and entrance
56.88231A17th StreetSouthbound exit and entrance
57.92231BCalifornia 46.svg SR 46 east (24th Street / CR G14 west) Fresno, Bakersfield Northern end of SR 46 overlap; signed as exit 231 northbound
58.76232Spring Street (US 101 Bus. south)No southbound entrance; former US 101
Northern end of freeway
Southern end of freeway
San Miguel 65.08239AMission Street San Miguel Northbound exit and southbound left entrance
65.56239B10th StreetSigned as exit 239 southbound
67.23241AMission Street San Miguel Southbound exit and northbound entrance
R67.71241B Camp Roberts Signed as exit 241 northbound
Monterey
MON R0.00-101.32
R0.84244 Camp Roberts
R2.15245 East Garrison
R3.35–
R5.10
Camp Roberts Rest Area
Bradley R7.94251 Bradley
R9.67252CR G18 jct.svg CR G18 (Jolon Road) Fort Hunter Liggett
R15.47258Alvarado Road
R17.86260Los Lobos Road
R21.99263Paris Valley Road San Ardo
R29.90271Paris Valley Road Lockwood
San Lucas R32.02273California 198.svg SR 198 east San Lucas, Coalinga
R37.31278Wild Horse Road
King City R39.77281First Street (US 101 Bus. north / CR G15 to CR G13)
R40.72282ACanal Street
R41.18282BBroadway (US 101 Bus. south / CR G13)
R41.95283CR G14 jct.svg CR G14 (Jolon Road) Fort Hunter Liggett
Northern end of freeway
Southern end of freeway
Greenfield 52.66293Espinosa Road (US 101 Bus. north, CR G16)Former US 101
53.36294AOak Avenue
53.86294BWalnut Avenue
54.79295Thorne Road (US 101 Bus. south)Former US 101
Northern end of freeway
Southern end of freeway
Soledad 60.40301Arroyo Seco Road
61.59302California 146.svg SR 146 (US 101 Bus. north) Soledad Former US 101
62.70303Front Street (US 101 Bus. south)
64.63305Camphora Gloria Road
66.40307 Salinas Valley State Prison
Gonzales 69.37310Gloria Road (US 101 Bus. north), Alta StreetFormer US 101
70.863115th Street
72.61313Old Stage Road (US 101 Bus. south)
Northern end of freeway
Southern end of freeway
Chualar 76.97317 Chualar
Northern end of freeway
82.47323Abbott Street (US 101 Bus. north) Spreckels Northbound left exit and southbound left entrance; interchange
Southern end of freeway
Salinas 85.62326AAirport Boulevard
326BFairview AvenueNorthbound exit only
86.12326C Monterey Peninsula Signed as exit 326B southbound
86.82327California 68.svg SR 68 (John Street)
87.30328To plate green.svg
California 183.svg
Market Street to SR 183  Santa Cruz
R88.24329Main Street (SR 183, US 101 Bus. south)
R89.27330Laurel Drive
R91.01331Boronda Road (US 101 Bus. south)
92.19333Sala Road
Northern end of freeway
Prunedale 95.44336California 156.svg SR 156 west / Vierra Canyon Road Monterey Peninsula Southern end of SR 156 overlap; interchange
96.14337San Miguel Canyon Road (CR G12)Interchange
98.37339Crazy Horse Canyon Road, Echo Valley RoadInterchange
100.39Dunbarton Road to San Juan Road (CR G11)Closed in 2015 after the construction of the San Juan Road interchange
San Benito
SBT 0.00-R7.52
0.13342San Juan Road (CR G11) Aromas, Watsonville Interchange
Southern end of freeway
3.01345California 156.svg SR 156 east San Juan Bautista, Hollister Northern end of SR 156 overlap
R4.90347California 129.svg SR 129 west Watsonville, Santa Cruz
R6.49349Betabel Road, Y Road
Northern end of freeway
Santa Clara
SCL R0.03-52.55
3.16353California 25.svg SR 25 south Hollister, Pinnacles National Park Interchange
Southern end of freeway
Gilroy R4.94355 Monterey Road (US 101 Bus. north)
R6.08356California 152.svg SR 152 east (Pacheco Pass Road) / 10th StreetSouthern end of SR 152 overlap
R7.53357California 152.svg SR 152 west (Leavesley Road / CR G9) Gilroy Northern end of SR 152 overlap
R10.27360Masten Avenue
San Martin R12.46362San Martin Avenue
Morgan Hill R15.07365Tennant Avenue
R16.01366East Dunne Avenue
R17.82367Cochrane Road (US 101 Bus. south)
San Jose R21.25371Coyote Creek Golf Drive
R23.10373Bailey Avenue
R26.78377ACalifornia 85.svg SR 85 north (West Valley Freeway) Mountain View, Cupertino No northbound entrance; signed as exit 377B southbound; SR 85 south exit 1A
California 85.svg SR 85 north HOV access only; northbound exit and southbound entrance
R27.00377BSilicon Valley Boulevard, Bernal RoadSigned as exit 377A southbound
R28.61378To plate green.svg
California 82.svg
Blossom Hill Road (CR G10) / Silver Creek Valley Road to SR 82
Southern end of Bayshore Freeway; [50] former SR 82
30.10380Hellyer Avenue
31.00381Yerba Buena RoadSouthbound exit was separated from Exit 382 in 2014
31.70382 Capitol Expressway (CR G21)
33.03383Tully Road
34.11385BI-280 (1961).svgI-680 (1961).svg I-280 north / I-680 north Downtown San Jose, Sacramento Northbound exit and southbound entrance; southern end of Joe Colla Interchange; ramps extend over the Story Road interchange; I-680 exit 1B
34.55385AStory RoadSigned as exit 385 northbound
34.87384I-280 (1961).svgI-680 (1961).svg I-280 north / I-680 north San Francisco, Downtown San Jose, Sacramento Southbound exit and northbound entrance; northern end of Joe Colla Interchange; I-680 exit 1B
R35.76386ACalifornia 130.svg SR 130 (Alum Rock Avenue) / Santa Clara Street
R36.14386BMcKee Road, Julian Street
387Mabury Road, Taylor StreetPlanned interchange scheduled to open in late 2021
37.73388AOakland Road, 13th StreetFormer SR 238
38.30388I-880 (1961).svg I-880 (Nimitz Freeway) Oakland, Santa Cruz, Los Gatos Signed as exits 388B (north) and 388C (south); I-880 exits 4B-C
38.80389AOld Bayshore Highway, 4th StreetNo southbound exit
39.29389BBrokaw Road, First StreetSigned as exit 389 southbound
39.93390California 87.svg SR 87 south (Guadalupe Parkway)Southbound exit and northbound entrance; SR 87 north exit 9B
San JoseSanta Clara line40.70391Trimble Road, De la Cruz Boulevard (CR G6)Signed as exits 391A (Trimble Road) and 391B (De la Cruz Boulevard) southbound
Santa Clara 41.98392 San Tomas Expressway, Montague Expressway (CR G4)
42.73393Great America Parkway, Bowers Avenue
Sunnyvale 43.85394 Lawrence Expressway (CR G2)
44.83395Fair Oaks AvenueSigned as exits 395A (north) and 395B (south) southbound
45.68396ATo plate green.svg
California 237.svg
Mathilda Avenue to SR 237 east
Former SR 85
US 101 Peninsula Express LanesSouthern end of express lane-under construction; scheduled to open in 2021-23
46.13396BCalifornia 237.svg SR 237 east Alviso, Milpitas Southbound exit and northbound entrance; SR 237 west exit 3A
46.13396CCalifornia 237.svg SR 237 west (Mountain View Alviso Road)Northbound exit and southbound entrance; SR 237 east exit 3A
Mountain View 47.01397Ellis Street
47.89398AMoffett Boulevard, NASA ParkwaySigned as exit 398 northbound
California 85.svg SR 85 south HOV access only-express lane under construction; southbound exit and northbound entrance
48.10398BCalifornia 85.svg SR 85 south Cupertino, Santa Cruz Southbound exit and northbound entrance; northbound exit is via exit 396C; SR 85 north exit 24B
48.60399AShoreline BoulevardSigned as exit 399 southbound
48.97399BOld Middlefield WayNorthbound exit and southbound entrance
49.61400AAmphitheatre Parkway, Rengstorff AvenueSigned as exits 400A (Amphitheatre Parkway) and 400B (Rengstorff Avenue) northbound
Mountain ViewPalo Alto line50.32400CSan Antonio RoadSigned as exits 400B (north) and 400C (south) southbound
Palo Alto 52.01402 Oregon Expressway (CR G3)
52.17402Embarcadero Road
San Mateo
SM 0.00-26.11
East Palo Alto 0.89403University Avenue (to SR 109)
East Palo AltoMenlo Park line1.87404Willow Road (SR 114)
Menlo Park 3.59406California 84.svg SR 84 east (Marsh Road) – Dumbarton BridgeSouthern end of SR 84 overlap
Redwood City 5.39408California 84.svg SR 84 west (Woodside Road) / Seaport BoulevardNorthern end of SR 84 overlap
6.62409Whipple Avenue
San Carlos 411Brittan AvenueSouthbound exit and entrance
8.40411Holly Street, Redwood Shores Parkway
412Harbor BoulevardSouthbound exit and entrance
Belmont 9.55412Marine Parkway, Ralston AvenueFormer Legislative Route 214
San Mateo 11.15414AHillsdale Boulevard Foster City
11.90414BCalifornia 92.svg SR 92  Hayward, San Mateo Bridge, Half Moon Bay SR 92 exits 13A-B
11.90414BFashion Island BoulevardNo northbound exit
12.69415Kehoe AvenueNorthbound exit and entrance
13.464163rd AvenueFormer SR 92
14.33417ADore AvenueNorthbound exit and entrance
14.33417Poplar AvenueSouthbound exit and entrance
14.69417BPeninsula Avenue Burlingame Northbound exit and entrance
Burlingame 16.02419AAnza BoulevardNorthbound exit and entrance
16.58419BBroadwaySigned as exit 419 southbound
Millbrae 17.95421Millbrae AvenueSigned as exit 420 southbound
San Bruno 19.12422Airport Sign.svg San Francisco International Airport Southbound exit is part of exit 423A
R20.39423ASan Bruno Avenue
US 101 Peninsula Express LanesNorthern end of express lane-under construction; scheduled to open in 2021-23
R20.72423BI-380 (1961).svgTo plate blue.svg
I-280 (1961).svg
I-380 west to I-280  San Bruno
I-380 west exit 6, east exits 6A-B
South San Francisco R20.72423CNorth Access Road (I-380 east) – North Cargo AreaSouthbound exit is part of exit 423A
21.69424South Airport Boulevard
21.92425AGrand Avenue Downtown South San Francisco No southbound entrance
22.71425BOyster Point Boulevard
425C South San Francisco (Airport Boulevard)Southbound exit and entrance
Brisbane 23.39426A Brisbane, Cow Palace (Bayshore Boulevard)Northbound exit only
23.66426BSierra Point Parkway, Marina BoulevardSigned as exit 426 southbound; southbound exit and entrance are located 1.2 miles (1.9 km) north of northbound exit and entrance
City and County of San Francisco
SF 0.00-11.18
0.03429ATunnel Avenue Candlestick Park
0.77429B Third Street  Cow Palace
1.11429CPaul AvenueNo northbound entrance; signed as exit 430A southbound
1.44430AI-280 (1961).svg I-280  Daly City, Downtown San Francisco Northbound exit and southbound entrance; southern end of Alemany Maze; ramps extend over the Silver Avenue interchange; I-280 north exit 54A, south exit 54
1.77430BSilver AvenueNo northbound entrance
1.98431I-280 (1961).svg I-280 south Daly City Southbound exit and northbound entrance; northern end of Alemany Maze; I-280 north exit 54B
2.00431 Alemany Boulevard, Bayshore Boulevard
2.92432 Cesar Chavez Street, Potrero AvenueCesar Chavez Street was formerly Army Street
4.10433A Vermont Street Northbound exit only
R4.24433BI-80 (1961).svg I-80 east Bay Bridge, Oakland Northern end of Bayshore Freeway; southern end of Central Freeway; [50] signed as exit 433 southbound; I-80 exits 1A-B
R4.55433CNinth Street Civic Center Northbound exit and southbound entrance
T5.20434ADuboce AvenueNorthbound exit and southbound entrance
5.40434B Octavia Boulevard to Fell StreetNorthbound exit and southbound entrance
Northern end of Central Freeway
Market Street No left turns
Geary Boulevard No left turn from northbound US 101
Broadway No left turns from Broadway; no left turn from northbound US 101
Van Ness Avenue, Lombard Street No left turn from southbound Van Ness Avenue; no left turn from westbound Lombard Street
Southern end of Presidio Parkway
Southern end of freeway
L8.59437Marina Boulevard, Girard Road Marina, Presidio
9.40438California 1.svg SR 1 south (Park Presidio Boulevard) Golden Gate Park Southern end of SR 1 overlap
9.71439Lincoln Boulevard – View Area, Presidio, Golden Gate NRA, Fort Point Northern end of Presidio Parkway; Lincoln Boulevard not signed northbound
Golden Gate 11.18–
L0.01
Golden Gate Bridge
(Southbound toll only; no state maintenance on bridge)
Marin
MRN L0.00-27.63
Sausalito 0.10H. Dana Bower Rest Area and Vista Point (northbound only);
southern end of Redwood Highway
0.32442Alexander Avenue
0.89 Robin Williams Tunnel under Waldo Grade
1.52443Spencer Avenue, Monte Mar Drive
2.48444Rodeo AvenueSouthbound exit and entrance connects to a dead end
3.33445A Sausalito, Marin City
4.46445BCalifornia 1.svg SR 1 north Mill Valley, Stinson Beach Northern end of SR 1 overlap; Mill Valley not signed southbound
Strawberry 4.78446Seminary Drive
Redwood Highway Frontage Road (unsigned)Southbound exit only
5.70447California 131.svg SR 131 east (Tiburon Boulevard) / East Blithedale Avenue
Corte Madera Casa Buena DriveSouthbound entrance only
7.37449AParadise Drive, Tamalpais DriveSigned as exit 449 northbound
7.66449BMadera BoulevardSouthbound exit and entrance
8.02450ALucky Drive, Doherty DriveDoherty Drive not signed northbound
Larkspur 8.60450B San Anselmo, Richmond Bridge Northbound signage
Sir Francis Drake Boulevard Southbound signage
San Rafael 9.63451AAndersen Drive, Francisco BoulevardSouthbound exit and entrance
10.00451To plate blue.svg
I-580 (1961).svg
Francisco Boulevard east to I-580  Richmond Bridge
Northbound exit only
10.00451BI-580 (1961).svg I-580 east Richmond Bridge, Oakland Southbound exit and northbound entrance; I-580 west exit 1A
10.72452 Central San Rafael
12.19454ALincoln AvenueNo northbound exit
12.69454BNorth San Pedro RoadSigned as exit 454 northbound
13.71455Freitas Parkway Terra Linda
14.71456Lucas Valley Road, Smith Ranch Road
15.57457St. Vincent Drive, Miller Creek Road
Novato 16.64458Nave DriveNorthbound signage
Alameda del PradoSouthbound signage
18.09459Ignacio Boulevard, Bel Marin Keys Boulevard, Entrada Drive Hamilton Field Entrada Drive, Hamilton Field not signed northbound; signed as exits 459A (Bel Marin Keys Boulevard, Hamilton Field) and 459B (Ignacio Boulevard, Entrada Drive) southbound
18.94460California 37.svg SR 37 east / South Novato Boulevard Napa, Vallejo Signed as exits 460A (SR 37) and 460B (South Novato Boulevard) northbound
R20.19462ARowland Boulevard (US 101 Bus. north)
R21.11462BDe Long AvenueServes Downtown Novato
R22.00463Atherton Avenue, San Marin Drive (US 101 Bus. south)
26.90467San Antonio Road, Silveira Ranch Road
Sonoma 2.94472APetaluma Boulevard South (US 101 Bus. north), Kastania Road
Petaluma 3.58472BCalifornia 116.svg SR 116 east Sonoma, Napa Southern end of SR 116 overlap
4.76474East Washington Street Central Petaluma
5.76476Old Redwood Highway, Petaluma Boulevard North (US 101 Bus. south) Penngrove
10.67479Railroad AvenueNorthbound exit and southbound entrance
Cotati 12.00481AWest Sierra AvenueNorthbound exit and southbound entrance
12.69481BCalifornia 116.svg SR 116 west (Gravenstein Highway) Rohnert Park, Sebastopol, Cotati Northern end of SR 116 overlap; signed as exit 481 southbound
Rohnert Park 13.88483Rohnert Park Expressway
15.02484AGolf Course Drive, Wilfred AvenueSigned as exit 484 southbound
15.53484BSanta Rosa Avenue (US 101 Bus. north)Northbound exit and southbound entrance
16.54485Todd Road
Santa Rosa 18.49487Yolanda Avenue, Hearn AvenueYolanda Avenue not signed southbound
19.00488ABaker AvenueNorthbound signage
Corby Avenue, Santa Rosa AvenueSouthbound signage
19.66488BCalifornia 12.svg SR 12  Sebastopol, Sonoma SR 12 west exits 7A-B, east exit 7
20.09489Third Street – Downtown Santa Rosa Third Street not signed southbound
20.74490College Avenue
21.74491ASteele Lane, Guerneville RoadSigned as exit 491 southbound
22.52491BBicentennial WayNorthbound exit and southbound entrance
22.81492Mendocino Avenue (US 101 Bus. south), Old Redwood Highway, Hopper AvenueHopper Avenue not signed northbound; Old Redwood Highway not signed southbound
24.86494River Road Guerneville, Calistoga
25.90495AFulton Road Fulton Closed after the reconstruction of the Airport Boulevard interchange
26.33495Airport Boulevard, Fulton Road Fulton
Windsor 27.62496Shiloh Road
29.35498Old Redwood Highway – Central Windsor
30.67499Arata LaneNo northbound entrance
Healdsburg 33.48502Healdsburg AvenueNorthbound signage
Old Redwood HighwaySouthbound signage
34.55503 Central Healdsburg Northbound exit and southbound entrance
34.88504Westside Road Guerneville Southbound exit and northbound entrance
36.27505Dry Creek Road
R38.56507Lytton Springs Road, Alexander Valley Road
R40.03509Independence Lane
Geyserville R41.43510To plate green.svg
California 128.svg
Geyserville Avenue to SR 128 east Geyserville
R43.37512California 128.svg SR 128 east / Canyon Road (CR C1) Geyserville, Calistoga Southern end of SR 128 overlap
R47.85517 Asti
R49.05518Dutcher Creek Road Stewarts Point
Cloverdale R50.43519South Cloverdale Boulevard (US 101 Bus. north, SR 128 Bus. west)
R51.62520Citrus Fair Drive
R53.40522California 128.svg SR 128 west (US 101 Bus. south) Fort Bragg, Mendocino Northern end of SR 128 overlap
Mendocino
MEN R0.10-T106.80
0.48525Geysers Road
Northern end of freeway
Hopland 10.89California 175.svg SR 175 east Lakeport
Southern end of freeway
19.68544Burke Hill Drive
20.71545Cox-Shrader Road
R21.59546California 253.svg SR 253 west Ukiah, Boonville
Ukiah R23.45548A Talmage (SR 222)
R24.06548BGobbi Street
R24.53549Perkins Street, Vichy Springs Road Central Ukiah
R26.16551North State Street Ukiah
27.41552Lake Mendocino Drive
30.43555A Calpella
30.83555BCalifornia 20.svg SR 20 east Upper Lake, Williams Southern end of SR 20 overlap
R32.63557West Road Redwood Valley
Northern end of freeway
Ridgewood Summit
Southern end of freeway
568California 20.svg SR 20 west Willits, Fort Bragg Northern end of SR 20 overlap; former US 101 north
573North Main StreetFormer US 101 south
Northern end of freeway
58.90Moss Cove Rest Area (southbound only)
Longvale 59.31California 162.svg SR 162 east Covelo, Round Valley
61.82Irvine Lodge Road – Irvine Lodge Rest AreaNo left turn from US 101 south
82.50Empire Camp Rest Area (northbound only)
Southern end of freeway
R84.69609California 271.svg SR 271 northFormer US 101 north
South Leggett R89.57614 South Leggett (SR 271)Former US 101
Northern end of freeway
Leggett T91.25California 1.svg SR 1 south Leggett, Fort Bragg Former SR 208 south
South Fork Eel River R99.51–
R100.02
Confusion Hill Bridges
Southern end of freeway
Reynolds R101.89625California 271.svg SR 271 Former US 101
Piercy R103.81627 Piercy (SR 271)Former US 101
Humboldt
HUM T0.00-R137.44
Northern end of freeway
Cooks Valley T0.08California 271.svg SR 271 south Piercy, Cooks Valley Former US 101 south
Southern end of freeway
Benbow R8.60636 Benbow
Garberville R11.13639ASprowel Creek Road (US 101 Bus. north) Garberville No northbound entrance
R11.50639B Garberville, Redway No southbound entrance
R14.31642Redwood Drive (US 101 Bus. south) Redway
R17.91645 Avenue of the Giants (SR 254), Hooker Creek Road Phillipsville Hooker Creek Road not signed northbound; Avenue of the Giants not signed southbound
R22.44650 Miranda, Phillipsville
25.01653Salmon Creek Road
Myers Flat 27.94656 Myers Flat (SR 254)
33.22661 Weott
35.70663 South Fork, Honeydew (SR 254)
39.16667A Avenue of the Giants (SR 254)Southbound exit only
R39.67667 Redcrest, Holmes
R43.32671 Pepperwood, Redcrest, Holmes
R45.90674 Avenue of the Giants (SR 254), Jordan Road Pepperwood Avenue of the Giants not signed northbound; Jordan Road not signed southbound
R47.95676Stafford Road
Northern end of freeway
Southern end of freeway
R51.84679 Rio Dell, Scotia (SR 283, US 101 Bus. north)
Rio Dell R52.60680Davis Street
R53.38681Wildwood Avenue (US 101 Bus. south) Rio Dell
Northern end of freeway
Southern end of freeway
Fortuna 57.69685California 36.svg SR 36 east Hydesville, Bridgeville
59.50687Kenmar Road (US 101 Bus. north), Riverwalk DriveRiverwalk Drive not signed southbound
60.4968812th Street
61.53689Main Street (US 101 Bus. south)
62.23690Palmer Boulevard
Fernbridge 63.10691 Fernbridge, Ferndale (to SR 211)Northbound exit and southbound entrance
64.30692 Loleta, Fernbridge, Ferndale (SR 211)
65.95694Loleta Drive
68.21696Hookton Road Loleta
Eureka 70.61698 College of the Redwoods
72.03699 Fields Landing
72.88700King Salmon Avenue
73.72701Humboldt Hill Road Humboldt Hill
74.77702Herrick Avenue, Elk River Road
Northern end of freeway
79.17California 255.svg SR 255 north (R Street) / Myrtle Avenue Samoa
Arcata Southern end of freeway
85.03712South G StreetSouthbound exit and entrance
85.83713California 255.svg SR 255 south (Samoa Boulevard) Arcata, Samoa, Sunny Brae
86.50714A14th Street Humboldt State University Northbound exit and southbound entrance
86.94714BSunset Avenue Arcata, Humboldt State University Signed as exit 714 southbound
88.27716ACalifornia 299.svg SR 299 east Weaverville, Redding
88.80716BGiuntoli Lane, Janes Road
McKinleyville R90.13718California 200.svg SR 200 east (North Bank Road) / Central Avenue (US 101 Bus. north) McKinleyville Central Avenue not signed southbound
R91.47719School Road
R93.00721Murray Road
R93.85722Airport Sign.svg Arcata-Eureka Airport
R95.62723North Central Avenue (US 101 Bus. south) McKinleyville
R97.02725Crannell Road
98.07726AWesthaven DriveNorthbound exit and southbound entrance
98.36726B6th Avenue Westhaven Signed as exit 726 southbound
Trinidad 100.71728 Trinidad
R102.90Trinidad – Southbound Rest Area
R103.37731Seawood Drive
R105.14Trinidad – Northbound Rest Area
R106.06734Patricks Point Drive
Northern end of freeway
Southern end of freeway
R126.09753Newton B. Drury Scenic Parkway northFormer US 101 north
Del Norte
DN M0.00-46.49
R0.15765Newton B. Drury Scenic Parkway southFormer US 101 south
R3.56768Klamath Beach Road (CR D8)
Klamath R4.64769California 169.svg SR 169 east Klamath, Terwer Valley
Northern end of freeway
Requa Road (CR D7) / Minot Creek Road
Crescent City 25.84Elk Valley Road (CR D2) Elk Valley Rancheria
27.01CR D3 jct.svg CR D3 (Northcrest Drive)
Parkway Drive to Washington BoulevardNorthbound exit and entrance; interchange
Southern end of freeway
R27.87791Washington Boulevard (CR D1)No northbound exit
R30.81794US 199 (1961 cutout).svgTo plate blue.svg
I-5.svg
US 199 north (Redwood Highway north) to I-5  Grants Pass
Northbound exit and southbound entrance; US 101 south transitions onto Redwood Highway south
Northern end of freeway
To plate.svg
US 199 (1961 cutout).svg
Elk Valley Cross Road (CR D2) to US 199  Grants Pass
Lake Earl Drive (CR D3) Pelican Bay State Prison
36.26California 197.svg SR 197 south (North Bank Road)
Fred D. Haight Drive (CR D4)
Smith River 39.83Fred D. Haight Drive (CR D4) Smith River
Sarina Road, Ocean View Drive (CR D5)
Smith River Rancheria Mouth Smith River Road (CR D6)
Ocean View Drive (CR D5)
46.20Agricultural Inspection Station (southbound only)
46.49US 101.svg US 101 north Oregon Coast, Portland Continuation into Oregon
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

Related Research Articles

U.S. Route 101 Numbered U.S. Highway in California, Oregon, and Washington in the United States

U.S. Route 101, or U.S. Highway 101 (US 101), is a north–south United States Numbered Highway that runs through the states of California, Oregon, and Washington, on the West Coast of the United States. It is also known as El Camino Real where its route along the southern and central California coast approximates the old trail which linked the Spanish missions, pueblos, and presidios. It merges at some points with California State Route 1 (SR 1).

State Route 1 (SR 1) is a major north–south state highway that runs along most of the Pacific coastline of the U.S. state of California. At a total of just over 656 miles (1,056 km), it is the longest state route in California, and the second-longest in the US after Montana Highway 200. SR 1 has several portions designated as either Pacific Coast Highway (PCH), Cabrillo Highway, Shoreline Highway, or Coast Highway. Its southern terminus is at Interstate 5 (I-5) near Dana Point in Orange County and its northern terminus is at U.S. Route 101 (US 101) near Leggett in Mendocino County. SR 1 also at times runs concurrently with US 101, most notably through a 54-mile (87 km) stretch in Ventura and Santa Barbara counties, and across the Golden Gate Bridge.

Interstate 580 (I-580) is an approximately 82-mile-long (132 km) east–west auxiliary Interstate Highway in Northern California. The heavily traveled spur route of I-80 runs from US 101 in San Rafael in the San Francisco Bay Area to I-5 near Tracy in the Central Valley. I-580 forms a concurrency with I-80 between Albany and Oakland, the latter of which is the location of the MacArthur Maze interchange immediately east of the San Francisco–Oakland Bay Bridge. I-580 provides a connection from the Bay Area to the southern San Joaquin Valley and Southern California via I-5, as I-5 bypasses the Bay Area to the east.

Santa Ana Freeway Highway in California

The Santa Ana Freeway is one of the principal freeways in Southern California, connecting Los Angeles and its southeastern suburbs including the freeway's namesake, the city of Santa Ana. The freeway begins at its junction with the San Diego Freeway, called the El Toro Y, in Irvine, signed as I-5. From there, it generally goes southeast to northwest to the East Los Angeles Interchange, where it takes the designation of U.S. Route 101 (US 101). It then proceeds 2.95 miles (4.75 km) northwest to the Four Level Interchange in downtown Los Angeles. Formerly, the entirety of the route was marked as US 101 until the 1964 highway renumbering, which truncated US 101 to the East Los Angeles Interchange and designated the rest of the freeway as I-5.

Bayshore Freeway Freeway in California

The Bayshore Freeway is a part of U.S. Route 101 in the San Francisco Bay Area of the U.S. state of California. It runs along the west shore of the San Francisco Bay, connecting San Jose with San Francisco. Within the city of San Francisco, the freeway is also known as James Lick Freeway, named after the California philanthropist. The road was originally built as a surface road, the Bayshore Highway, and later upgraded to freeway standards. Before 1964, it was mostly marked as U.S. Route 101 Bypass, with US 101 using the present State Route 82.

Ventura Freeway freeway in Southern California

The Ventura Freeway is a freeway in southern California, United States, running from the Santa Barbara/Ventura county line to Pasadena in Los Angeles County. It is the principal east-west route through Ventura County and in the southern San Fernando Valley in Los Angeles County. From the Santa Barbara County line to its intersection with the Hollywood Freeway in the southeastern San Fernando Valley in Los Angeles, it is signed as U.S. Route 101 (US 101), which was built in the late 1950s and opened on April 5, 1960. East of the Hollywood Freeway intersection, it is signed as State Route 134 (SR 134) which was built by 1971.

California State Route 85 Highway in California

State Route 85, known as the West Valley Freeway along its entire length, is a state highway which connects the cities of southern San Jose and Mountain View in the U.S. State of California. The highway intersects with major highways such as I-280, SR 17, and SR 87. The route provides an alternate to U.S. Route 101, bypassing downtown San Jose and instead passing through the foothill cities of Los Gatos, Saratoga, Cupertino, and other cities in the southern San Francisco Peninsula, roughly paralleling the Santa Cruz Mountains up to its interchange with I-280.

California State Route 58 Major state highway in California

State Route 58 is a major east-west state highway in the U.S. state of California that runs across the Coast Ranges, the southern San Joaquin Valley, the Tehachapi Mountains, which border the southern Sierra Nevada, and the Mojave Desert. It runs between U.S. Route 101 near Santa Margarita and Interstate 15 in Barstow. It has junctions with Interstate 5 near Buttonwillow, State Route 99 in Bakersfield, State Route 202 in Tehachapi, State Route 14 near Mojave, and U.S. Route 395 at Kramer Junction. SR 58 also provides access to Edwards Air Force Base. At various points it is known as the Calf Canyon Highway, Carrisa Highway, Bakersfield-McKittrick Highway, Rosa Parks Highway, Rosedale Highway, Barstow-Bakersfield Highway, Bakersfield Tehachapi Highway, Kern County Korean War Veterans Memorial Highway, and Mojave-Barstow Highway.

California State Route 152 East-west highway in central California

State Route 152 is a state highway that runs from east to west near the middle of the U.S. state of California from State Route 1 in Watsonville to State Route 99 southeast of Merced. Its western portion provides access to and from Interstate 5 toward Southern California for motorists in or near Gilroy and San Jose.

California State Route 87 Highway in San Jose, California

State Route 87, known as the Guadalupe Freeway, is a north–south state highway in San Jose, California, United States. Before being upgraded to a freeway, it was Guadalupe Parkway.

California State Route 82 Highway in California

State Route 82 is a state highway in the U.S. state of California that runs from Interstate 880 (I-880) in San Jose to I-280 in San Francisco following the San Francisco Peninsula. It is the spinal arterial road of the peninsula and runs parallel to the nearby Caltrain line along much of the route. For much of its length, the highway is named El Camino Real and formed part of the historic El Camino Real mission trail. It passes through and near the historic downtowns of many Peninsula cities, including Burlingame, San Mateo, Redwood City, Menlo Park, Palo Alto, Mountain View, and Sunnyvale, and through some of the most walkable and transit-oriented neighborhoods in the region.

State Route 2 (SR 2) is a state highway in Los Angeles County and San Bernardino County, California. It connects the Los Angeles Basin with the San Gabriel Mountains and the Victor Valley in the Mojave Desert. The highway's western end is at the intersection of Centinela Avenue at the Santa Monica-Los Angeles border and its eastern end is at SR 138 east of Wrightwood. The SR 2 is divided into four segments, and it briefly runs concurrently with U.S. Route 101 (US 101) and Interstate 210 (I-210). The western section of the highway runs along a segment of Santa Monica Boulevard, an old routing of US 66, to US 101 in East Hollywood; the second section runs along segments of Alvarado Street and Glendale Boulevard in Echo Park; the third section to I-210 in Glendale is known as the Glendale Freeway; and the eastern portion from I-210 in La Cañada Flintridge to SR 138 is designated as the Angeles Crest Highway.

California State Route 126 Highway in California

State Route 126 is a state highway in the U.S. state of California that serves Ventura and Los Angeles counties. The route runs from U.S. Route 101 in Ventura to Interstate 5 in Santa Clarita through the Santa Clara River Valley. The highway is an important connector highway in Ventura County, and serves as an alternate route into the Santa Clarita Valley, and the San Fernando Valley area of Los Angeles and the High Desert of Antelope Valley.

California State Route 12 State highway in California, United States

State Route 12 is a state highway in the U.S. state of California that travels in an east–west direction from State Route 116 in Sebastopol in Sonoma County to State Route 49 just north of San Andreas in Calaveras County. The route connects the Sonoma and Napa valleys with the Sacramento–San Joaquin River Delta and the Sierra Foothills. It is constructed to freeway standards from the Fulton Road/South Wright Road stoplight in Santa Rosa, to its partial interchange with Farmers Lane.

California State Route 4 State highway in California

State Route 4 is a state highway in the U.S. state of California, routed from Interstate 80 in the San Francisco Bay Area to State Route 89 in the Sierra Nevada. It roughly parallels the Sacramento-San Joaquin River Delta, a popular area for boating and fishing, with a number of accesses to marinas and other attractions. After crossing the Central Valley, the highway ascends up the Sierra foothills. It passes through Ebbetts Pass and contains the Ebbetts Pass Scenic Byway, a National Scenic Byway.

California State Route 156 Highway in California

State Route 156 is a west to east state highway in the U.S. state of California, running from State Route 1 in Castroville to State Route 152 near Hollister. It serves as part of the primary route from the Monterey Peninsula to either the San Francisco Bay Area or the California Central Valley.

California State Route 65 Highway in California

State Route 65 is a north-south state highway in the U.S. state of California. It is composed of two segments in the Central Valley. The southern segment begins at SR 99, near Bakersfield and terminates at SR 198 near Exeter. It also serves the communities of Oildale, Ducor, Terra Bella, Porterville, Strathmore, and Lindsay. The northern segment begins at Interstate 80 in Roseville and terminates at SR 70 at Olivehurst. It also serves Lincoln and Wheatland.

Interstate 10 (I-10) is a transcontinental Interstate Highway in the United States, stretching from Santa Monica, California, on the Pacific Ocean, to Jacksonville, Florida. The segment of I-10 in California runs east from Santa Monica through Los Angeles, San Bernardino, and Palm Springs before crossing into the state of Arizona. In the Greater Los Angeles area, it is known as the Santa Monica Freeway and the San Bernardino Freeway, linked by a short concurrency on I-5 at the East Los Angeles Interchange. I-10 also has parts designated as either the Rosa Parks Freeway, the Redlands Freeway, or the Christopher Columbus Transcontinental Highway.

Interstate 5 (I-5) is a major north–south route of the Interstate Highway System in the United States, stretching from the Mexican border at the San Ysidro crossing to the Canadian border near Blaine, Washington. From San Ysidro, the segment of I-5 in California runs north across the length of the state, and crosses into Oregon south of the Medford-Ashland metropolitan area. It is the more important and most-used of the two major north–south routes on the Pacific Coast, the other being U.S. Route 101 (US 101), which is primarily coastal. I-5 is known colloquially as "the 5" to Southern California residents and "5" to Northern California residents due to varieties in California English. The highway connects to the Mexican Federal Highway 1 (Fed. 1) in the south.

References

  1. 1 2 3 California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on June 30, 2015. Retrieved June 30, 2015.
  2. McNichol, Dan (2006). The Roads that Built America: The Incredible Story of the US Interstate System. New York: Sterling. p. 74. ISBN   1-4027-3468-9.
  3. Bureau of Public Roads & American Association of State Highway Officials (November 11, 1926). United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Washington, DC: United States Geological Survey. OCLC   32889555 . Retrieved November 7, 2013 via Wikimedia Commons.
  4. 1 2 Flores, Oscar (December 19, 2016). "Gaviota Coast officially designated State Scenic Highway status". KEYT-TV . Retrieved May 12, 2019.
  5. 1 2 California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved May 12, 2019.
  6. Faigin, Daniel P. "Highway Statistics". California Highways. Retrieved July 15, 2011.[ self-published source ]
  7. Masters, Nathan (November 10, 2015). "Why Southern Californians Love Saying 'the' Before Freeway Numbers". KCET . Retrieved August 4, 2017.
  8. "Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  9. Federal Highway Administration (March 25, 2015). National Highway System: California (South) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 7, 2017.
    Federal Highway Administration (March 25, 2015). National Highway System: California (North) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 7, 2017.
  10. Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012.
  11. "Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  12. California Department of Transportation (2012). Scenic Highway Guidelines (PDF). Sacramento: California Department of Transportation. p. 5. Retrieved June 8, 2017.
  13. Corwin, Miles (April 19, 1988). "Signal Removal on US 101 Gets Green Light After 34 Years". Los Angeles Times . Retrieved December 19, 2014.
  14. "First Phase OK'd for Novato Narrows Widening of Hwy. 101". The Press Democrat . Santa Rosa, CA. January 21, 2011. Retrieved July 14, 2011.
  15. County of Sonoma. "Sonoma County General Plan 2020 Open Space Community Separators". County of Sonoma. Retrieved July 14, 2011.
  16. Summit information by district, county, route, and postmile, California Department of Transportation, archived from the original on March 1, 2017, retrieved December 4, 2019
  17. National Park Service. "Plan Your Visit". Juan Bautista de Anza National Historic Trail. National Park Service. Retrieved September 9, 2010.
  18. Simon, Richard (December 19, 1994). "Hollywood Freeway Spans Magic and Might of L.A." Los Angeles Times.
  19. Starr, Kevin (2009). Golden Dreams: California in an Age of Abundance, 1950–1963. New York: Oxford University Press. p. 3.
  20. "Lights Out on an Era: Roads: After 40 Years, the Final Traffic Signal on US 101 in Santa Barbara Is Coming Down. There Will Be an Uninterrupted Freeway Along the Coast Between Los Angeles and San Francisco". Los Angeles Times. November 19, 1991. Retrieved March 17, 2015.
  21. King, John (January 3, 2007). "An Urban Success Story: Octavia Boulevard an Asset to post-Central Freeway Area". San Francisco Chronicle .
  22. Sinclair, J.P. (March–April 1960). "Freeways in District IV". California Highways and Public Works. Vol. 39 no. 3–4. pp. 13–32. ISSN   0008-1159 . Retrieved August 2, 2015 via Archive.org.
  23. Kuhn, Tillo E. (1962). Public Enterprise Economics and Transport Problems. University of California Press. p. 200.
  24. "All Lanes Open on 101—Finally". Morgan Hill Times. May 20, 2003. Archived from the original on July 14, 2011. Retrieved July 15, 2011.
  25. "Hwy 101 Opening Just Weeks Away". Morgan Hill Times. February 18, 2003. Archived from the original on July 20, 2011. Retrieved July 15, 2011.
  26. Staff (March 7, 2003). "US 101 Southbound to Open Next Friday". Morgan Hill Times. Archived from the original on July 14, 2011. Retrieved July 15, 2011.
  27. "US 101 Speedway". The Gilroy Dispatch. May 29, 2003. Archived from the original on July 19, 2011. Retrieved July 15, 2011.
  28. "Herhold: The Story Behind Joe Colla's Famous 1976 Highway Stunt". San Jose Mercury News . Retrieved October 10, 2014.
  29. "Bill Text". Archived from the original on October 6, 2014. Retrieved October 10, 2014.
  30. 1 2 "National Register Information System". National Register of Historic Places. National Park Service. March 13, 2009. Retrieved April 19, 2010.
  31. Hawk, Diane (2004). Touring the Old Redwood Highway: Humboldt County. Arcata, CA: Hawk Mountaintop Publishing. p. 48. ISBN   0-9672162-4-9.
  32. Olney, Jennifer (August 8, 2013). "Construction Begins on Controversial Willits Bypass". San Francisco: KGO-TV . Retrieved July 13, 2017.
  33. Olney, Jennifer (June 20, 2014). "Caltrans Ordered to Stop Work on Willits Bypass". San Francisco: KGO-TV. Retrieved July 30, 2014.
  34. Frisbie, Phil, Jr. (July 10, 2014). "Corps Lifts Permit Suspension on Willits Bypass Project". California Department of Transportation. Retrieved July 13, 2017.
  35. Anderson, Glenda (November 3, 2016). "Willits Highway 101 Bypass Finally Opens to Traffic". The Press Democrat. Santa Rosa, CA. Retrieved July 13, 2017.
  36. Carmona, Ariel, Jr. (November 3, 2016). "Willits Bypass Finally Opens to Fanfare and Dedication to Fallen Hero". The Willits News. Retrieved July 13, 2017.
  37. Anderson, Glenda (June 27, 2017). "Final Price of Willits Bypass $159 Million Higher than Reported". The Press Democrat. Santa Rosa, CA. Retrieved July 13, 2017.
  38. Weinreb, Elaine. "Big Changes Considered for 101 Through Eureka". North Coast Journal. Retrieved November 20, 2021.
  39. "Freeway wildlife corridor is feasible, study says". Visalia Times Delta. Associated Press. September 3, 2015. Retrieved May 26, 2021.
  40. Guldimann, Suzanne (February 9, 2015). "Liberty Canyon wildlife crossing granted $1 million by SCC". Malibu Surfside News. Retrieved September 12, 2015.
  41. "US 101 and State Route 85 Express Lanes Project (Phase 3)". Santa Clara Valley Transportation Authority. Retrieved August 19, 2021.
  42. "Fastrak Toll Collection Coming To New Hwy 101 Express Lanes At End Of 2021". sfgate.com. June 17, 2021.
  43. "US 101 Express Lanes Project (Phase 5)". Santa Clara Valley Transportation Authority. Retrieved August 19, 2021.
  44. Tracy, Erin (December 21, 2008). "Long-awaited highway fix to be scrutinized". Times-Standard. Retrieved March 16, 2012.
  45. "Walters: The runaround on coastal bypass debates". Santa Rosa Press Democrat. September 3, 2014. Retrieved November 20, 2021.
  46. California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
  47. California Department of Transportation (2005–2006). "All Traffic Volumes on CSHS". California Department of Transportation.
  48. California Department of Transportation. "U.S. Route 101 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. California Department of Transportation. Retrieved February 7, 2009.
  49. "California Highways: US 101". www.cahighways.org. Retrieved December 28, 2021.
  50. 1 2 3 4 5 6 California Department of Transportation. "2014 Named Freeways, Highways, Structures and Other Appurtenances in California" (PDF). California Department of Transportation. Retrieved June 20, 2015.
  51. Anaya-Morga, Laura (October 9, 2021). "Caltrans projected to break ground on wildlife bridge over 101 Freeway in January 2022". Los Angeles Times. Retrieved December 29, 2021.

Route map:

KML file (edithelp)
    KML is from Wikidata
    US 101.svg U.S. Route 101
    Previous state:
    Terminus
    California Next state:
    Oregon