State Route 5 followed the route of current SR 35 along Skyline Boulevard. It headed north along the ridges of the Santa Cruz Mountains from SR 17 near the Santa Clara-Santa Cruz county border to SR 1 in San Francisco. SR 5 was deleted in 1964 with the creation of Interstate 5 and was renumbered SR 35.
State Route 7 ran from SR 1 near SR 47 in Long Beach to Valley Boulevard in Monterey Park as the Long Beach Freeway. Originally running as State Route 15 in 1934, the route was changed to prevent confusion with I-15. In 1985, SR 7 was deleted and has since been renumbered as Interstate 710. SR 7 was redesignated in Calexico from I-8 near Holtville to the United States/Mexico border in 1990. This route was completed in 2005.
State Route 11 followed the route of current Interstate 110 and State Route 110 along the Harbor Freeway. It initially followed surface streets until the 1940s when the Arroyo Seco Parkway was completed. The Harbor Freeway, which was constructed to interstate standards, opened in phases from the late 1950s to the 1970s and SR 11 was since transferred to that route. In December 1978, the Harbor Freeway was approved as an Interstate Highway by the FHWA. In 1981, SR 11 was deleted and has since been renumbered as Interstate 110 on the Harbor Freeway, and State Route 110 on the Pasadena Freeway (later Arroyo Seco Parkway).
SR 11 was redesignated in San Diego from SR 905 near SR 125 to the United States/Mexico border in 1994 and the first segment opened in 2016.
State Route 21 closely followed the route of current Interstate 680. It began in San Jose heading northeast from I-280 and US 101 and closely paralleling SR 17 (now I-880) until reaching Fremont. From there, SR 21 headed northeast toward Pleasanton and intersected I-580. SR 21 then headed northwest to Concord and Martinez, California, intersecting SR 24 and SR 4 before reaching the Carquinez Strait. In Benicia, SR 21 intersected with SR 141 (now I-780) and ended in Fairfield at I-80.
The route was added to the Interstate Highway System in 1973. This became the new alignment of I-680, and the old route to Vallejo became I-780. SR 21 was then deleted in 1976 once corresponding changes were made by the state legislature.
State Route 26 was a state highway in Los Angeles and Orange counties in the U.S. state of California, from 1937 to 1964. It traveled from U.S. Route 101 Alternate (US 101 Alt.) in Santa Monica to SR 39 in Buena Park.[citation needed]
The route was assigned pre-1964 Legislative Route 173 (LR 173), defined in 1933 from Santa Monica to East Los Angeles.[citation needed] Between Santa Monica and Los Angeles, it was later replaced by the Santa Monica Freeway, and added to the Interstate Highway System on September 15, 1955.[citation needed] East of East Los Angeles, it was assigned LR 166.[citation needed]
The highway originally traveled along 10th Street in Los Angeles, but as Olympic Boulevard was built out to the west and east, it was aligned to that. East of Los Angeles, the highway turned southeast along the Anaheim Telegraph Road, which it followed into Santa Fe Springs. It then continued along Los Nietos Road, Valley View Avenue, and Stage Road before its terminus at La Habra Road (now Beach Boulevard). The portion east of Downtown Los Angeles was eventually deleted from the system as redundant to US 101 Byp. which later became Interstate 5 (I-5).[citation needed]
The highway was known as State Route 6 from 1934 to 1937. The current SR 26 bears no relation to this highway.
State Route 30 ran from Interstate 210 in San Dimas to Interstate 10 in Redlands through San Bernardino. It was built to freeway standards between Interstate 215 in San Bernardino and Interstate 10 and between the current terminus of State Route 57 in San Dimas to Foothill Boulevard in La Verne. When the freeway section between Foothill Boulevard and Interstate 215 was completed in 2007, the route was decommissioned and renumbered SR 210. It is expected to be incorporated into the Interstate highway system at some later date as an extension of Interstate 210.
State Route 31 ran from State Route 91 near Corona to Interstate 15 in Devore through San Bernardino. The route was deleted in 1974, when it was added to the interstate system. After being signed California 31, It was signed Temporary Interstate 15, and later, after being moved from Main Street in Corona, Hamner Avenue in Riverside County north of Corona, and Milliken Avenue in San Bernardino County to the Ontario Freeway. The route became Interstate 15.
State Route 35 originally ran north to south from State Route 22 to US 99, first along Los Alamitos Boulevard in Seal Beach which turns into Norwalk Boulevard. The highway continued west on Centralia Road and then north along Pioneer Boulevard until reaching San Antonio Drive at Rosecrans Avenue. San Antonio Drive would turn back into Norwalk Boulevard and continue with that street name until turning into Old Mill Road at Beverly Boulevard. Route 35 would wind through Rose Hills and Avocado Heights as Workman Mill Road and would then turn into Puente Avenue at Valley Boulevard where it would continue to its end at U.S. 99 at the border of Baldwin Park and West Covina. The route was deleted in 1964 due to the replacement by Interstate 605 and SR 35 was redesignated along Skyline Boulevard in the San Francisco Bay Area.
State Route 42 ran from State Route 1 west of Inglewood to State Route 91 near Norwalk, largely along Manchester Avenue and Firestone Boulevard. It was deleted in 2000. The segment east of Interstate 5 (Santa Ana Freeway) was added to State Route 90. The segment west of Interstate 5 was added to the interstate system as Interstate 105. The freeway would not be opened until 1993, which resulted in the original route continuing to be signed as State Route 42. To this day, Route 42 is still sporadically signed in many places.
State Route 69 began at SR 198 amid Tulare County. It then headed north and intersected SR 216 in Woodlake and CR J27 amid farmland in the county. The route continued to meet SR 201 in Elderwood. After several miles through Tulare County, it crossed into Fresno County, where it met its north end at State Route 180. In 1972, this highway was decommissioned and renumbered SR 245.
From 1963 to 1965, State Route 85 was a 10-11 mile highway that ran entirely on surface streets from US 101 near SR 237 to SR 82 along Mathilda Avenue and Saratoga-Sunnyvale Road (later De Anza Boulevard) between SR 82 and SR 9. The segment north of I-280 was deleted in 1965 once the current northern segment of the freeway opened. The southern segment was deleted in 1994 (the same day the remainder of the current freeway opened) and the route was immediately transferred over to the cities of Cupertino and Saratoga. The route still appeared in the California Transportation Commission's agenda in July 2000.
State Route 106 was originally created in 1964, and ran from State Route 38 in Redlands to State Route 18 in Running Springs. Prior to 1964, the highway was a part of Legislative Route 190, which ran from US 66 to State Route 38. After 1964, the route was split in half. The western portion became State Route 30. The eastern portion was combined with Legislative Route 207, and became State Route 106. A year later, its southern terminus was moved to Interstate 10. In 1972, State Route 106 was decommissioned. The northern portion between State Route 30 and State Route 18 was renumbered to State Route 330. The southern portion was added to State Route 30, extending it to Interstate 10. This also reconnected both halves of the original Legislative Route 190.
State Route 157 was planned to run from I-805 near Ocean View Boulevard in San Diego to SR 125 near the Sweetwater Reservoir, passing through the neighborhood of Paradise Hills.[1] What was known as Route 285 became a state highway in 1959,[2] and was redesignated as SR 157 in the 1964 state highway renumbering.[3] By 1974, plans called for constructing the freeway from Nogal Street across Imperial Avenue to end at SR 54. However, the project was cancelled after objections from the community, and because it was not compatible with any long-term plans.[4] Developments near the western half of the route served to discourage construction, and the plans for the eastern half were cancelled that year; the land was sold soon afterward.[1] The mayor of National City, Kile Morgan, opposed the proposal, citing concerns that many projects for the South Bay were being opposed by others.[5] The route was removed from the law by the Legislature in 1994.[6]
State Route 159 Between July 1, 1964, and the time it was turned back to local authorities, Route 159 was the segment of Linda Vista Avenue in Pasadena between State Route 134, the Ventura Freeway, and Interstate 210, the Foothill Freeway. From July 1, 1964, to 1965, this was also the segment of Figueroa Street between State Route 134 and Interstate 5. In 1965, this was to be deleted when I-210 was completed. Prior to July 1, 1964, it was a segment of California Legislative Route 165 and signed as California State Route 11.
State Route 171 was planned to run from I-5 near San Diego to I-805 through Switzer Canyon.[3] It was to be called the Switzer Canyon Freeway, and had been suggested by consultant John Nolen in 1926.[1] Originally designated as Route 284 in 1959,[2] the route was renumbered as SR 171 in the 1964 state highway renumbering.[3] However, the community opposed the project; it would have passed through Balboa Park and would have gone through canyons, residential districts, and a golf course. SANDAG endorsed the deletion in 1993,[1] and the Legislature deleted the route in 1994.[6]
State Route 176 ran from US 101 in Santa Maria to Sisquoc along Stowell Road, Philbric Road, and Foxen Canyon Road. Prior to July 1, 1964, it was an unsigned segment of California Legislative Route 148.
State Route 195 connected SR 86 with SR 111.[8] It served as a connector between the two routes while the SR 86 expressway was constructed. This route was deleted in 2014, when the part that was not deleted in 2009 was transferred to SR 111.[9]
State Route 206 was deleted from the state highway system, with varying reasons. Between July 1, 1964, and the time it was turned back to local authorities, Route 206 ran from Highland Avenue, formerly State Route 30, in San Bernardino along North E Street, Kendall Drive, and Palm Avenue to the Barstow Freeway, Interstate 215, in Verdemont. Prior to July 1, 1964, Route 206 was California Legislative Route 191 and was signed as Business U. S. 66.
State Route 214 was deleted in 1998. Between July 1, 1964, and the time it was turned back to local authorities, Route 214 ran between Lakewood Boulevard, then State Route 19, in Long Beach and the Santa Ana Freeway, Interstate 5, in Anaheim. Route 214 traversed Carson Street in Los Angeles County (between Route 19 and the Los Angeles/Orange County Line). It continued into Orange County on Lincoln Avenue (between the Los Angeles/Orange County Line and Route 5). Prior to July 1, 1964, Route 214 was a segment of California Legislative Route 178. Between 1962 and July 1, 1964, it was signed as US 91. Before 1962, it was signed as both US 91 and State Route 18.
State Route 224 was a spur route connecting U.S. Route 101 in Carpinteria to Carpinteria State Beach. From US101, it ran south along Casitas Pass Road, then west on Carpinteria Avenue before heading south again along Palm Avenue to the beach's entrance. The route was defined in the 1964 state highway renumbering,[3] then deleted in 1996.[13]
State Route 228 was to be a short bypass west of Brawley. The road as defined by the California State Legislature in the 1964 state highway renumbering would have begun at SR 862.5 miles (4.0km) southwest of Brawley and ended 2 miles (3.2km) west of Brawley.[3] However, this was also included in the 1935 definition of Route 26, which continued north to Los Angeles and south to Calexico,[14] along the approximate route of US 99.[15] The route was deleted in 1998;[16] by that time, no highway had been constructed along this route.[17]
State Route 231 was a designation for a state highway from SR 86 to SR 195 near Mecca. In 1935, the route was added to the state highway system.[14] Two years later, the route was given the designation of Route 204.[18] In the 1964 state highway renumbering, the route was renumbered as SR 231.[3] The Division of Highways proposed deleting this state highway in 1971,[19] The routing was removed from the state highway system in 1972.[20]
State Route 250 was the designation for State College Boulevard from I-5 in Orange to SR 91. The routing was only a temporary routing and the route ceased to be a state highway when the adjacent SR 57 freeway was completed.
State Route 252 was to connect I-5 to I-805, and provide almost direct access from I-805 to I-5, near the southern terminus of SR 15. The route would have run parallel to, and approximately halfway between, the current alignment of SR 94 and SR 54.[22][23]
SR 252 was defined as Route 283 in 1959,[2] and was redesignated as Route 252 in the 1964 state highway renumbering.[3] The California Highway Commission reviewed a 1.8-mile (2.9km) proposal for the route in 1965.[24] It was known as the El Toyon Freeway, and plans were to use it to balance the congestion between I-5 and I-805. By 1973, there was opposition based on concerns that it would split the community; according to an engineer from Caltrans, it was "a white man's freeway vs. a black community." If the freeway was not constructed, the federal government would stand to lose $10 million.[25] The Comprehensive Planning Organization in 1974 proposed widening arterial streets nearby as an alternative, even though the construction would affect 240 buildings.[26] Meanwhile, relocation of 280 households and the start of demolition had taken place.[27]
In 1977, a local vote took place to determine what to construct or if SR 252 should be constructed; however, $4.4 million had already been spent to construct the 43rd street interchange with I-805. Alternate plans included a city street and constructing a below-grade freeway.[28] By 1980, the California Transportation Commission had canceled plans to construct SR 252, due to the residential opposition.[1] The city of National City made attempts to have the plans reinstated in 1986 to reduce congestion within city limits.[29] The city of San Diego opposed the idea of constructing an additional freeway, while the county supported it.[30] The state told Caltrans to sell the land to the city of San Diego, though National City expressed interest in purchasing it, even though there would be San Diego city permits needed to construct a freeway on it.[31] National City then sued the state, but agreed to drop the suit in exchange for $10 million in traffic improvements on behalf of the city of San Diego.[32]
In 1993, the San Diego Association of Governments and Caltrans planned to have SR 252, along with SR 157 and SR 171, officially removed; the abandoned land was to be used for residential purposes.[1] The state legislature removed from the state highway system in 1994.[6] The only portion constructed is the ramps to and from I-805 at 43rd Street, in southern San Diego, approximately 0.5 miles (0.80km) long;[23] the ramps were completed in 1975.[29]
State Route 256 was a proposed highway from I-80 to State Route 65 north of Roseville, and was deleted in 1994. This was originally signed as part of Route 65, and of US 99E through Roseville. Route 256, a once adopted route for a west-side bypass of Roseville was rescinded by the California Transportation Commission in 1976 because of cost and difficulty of crossing the Southern Pacific Switchyard.
State Route 274 ran along Balboa Avenue, entirely within the city of San Diego. The highway started at I-5 in Pacific Beach before continuing east into Kearny Mesa and intersecting I-805 and SR 163 before ending at I-15.[33] Balboa Avenue still exists as a road between I-5 and I-15.[34]
Balboa Avenue was constructed in Pacific Beach by 1956,[35] and east into Clairemont by 1961.[36] The Legislature designated the route as from I-5 to SR 103 in 1965,[37] changing SR 103 to SR 15 in 1969.[38] Between 1969 and 1970, Balboa Avenue was completed from I-5 to SR 163 and signed as SR 274.[39][40] Completion of the route to I-15 was in place by 1982.[33] A sinkhole700-foot (210m) long and 65 feet (20m) deep opened at the I-15 interchange in 1998 after a storm across the region.[41] The route was deleted from state laws in 1999,[42] and given to the city of San Diego in 2001.[43]
State Route 285 was defined in 1970 as Route 70 on West Street in Portola northwesterly to the north city limits, then to Lake Davis via Humbug Canyon, and then easterly to Grizzly Reservoir via the south shore of the lake. This was deleted in 1998 because of problems with the right of way and drainage. The route was never constructed. According to the Caltrans photolog, the old alignment for Route 285 essentially is exactly the same as existing West Street (in Portola) and Lake Davis Road northeast to Grizzly Road just northeast of the Big Grizzly Creek.
State Route 480 was a state highway in San Francisco consisting of the elevated double-decker Embarcadero Freeway (also known as the Embarcadero Skyway), the partly elevated Doyle Drive approach to the Golden Gate Bridge and the proposed and unbuilt section in between. The unbuilt section from Doyle Drive to Van Ness Avenue was to have been called the Golden Gate Freeway and the Embarcadero Freeway as originally planned would have extended from Van Ness along the north side of Bay Street and then along the Embarcadero to the San Francisco-Oakland Bay Bridge.
The Embarcadero Freeway, which had only been constructed from Broadway along the Embarcadero to the Bay Bridge, was universally panned with many locals comparing it to the Alaskan Way Viaduct in Seattle. Demands to demolish the freeway were proposed as early as 1963 with the San Francisco Board of Supervisors supporting the proposal. The freeway was eventually demolished after the 1989 Loma Prieta earthquake, and Doyle Drive is now part of U.S. Route 101. SR 480 was Interstate 480, an auxiliary route of the Interstate Highway System, from 1955 to 1965. The entire route was deleted in 1991, approximately two years after the earthquake.
Interstate 880 (I-880) is a north–south auxiliary Interstate Highway in the San Francisco Bay Area of Northern California. It runs from I-280 and State Route 17 (SR 17) in San Jose to I-80 and I-580 in Oakland, running parallel to the eastern shore of San Francisco Bay. For most of its route, I-880 is officially known as the Nimitz Freeway, after World War II fleet admiral Chester W. Nimitz, who retired to the Bay Area. The northernmost five miles (8.0 km) is also commonly referred to as the Cypress Freeway, after the former alignment of the freeway and its subsequent replacement.
Interstate 805 (I-805) is a major north–south auxiliary Interstate Highway in Southern California. It is a bypass auxiliary route of I-5, running roughly through the center of the Greater San Diego region from San Ysidro near the Mexico–U.S. border to near Del Mar. The southern terminus of I-805 at I-5 in San Ysidro is less than 1 mi (1.6 km) north of the Mexican border. I-805 then traverses the cities of Chula Vista and National City before reentering San Diego. The freeway passes through the San Diego neighborhoods of North Park, Mission Valley, Clairemont, and University City before terminating at I-5 in the Sorrento Valley neighborhood near the Del Mar city limit.
Interstate 780 (I-780) is an east–west auxiliary Interstate Highway in the San Francisco Bay Area of Northern California. It runs from Curtola Parkway and Lemon Street in Vallejo to I-680 just north of the Benicia–Martinez Bridge in Benicia. It closely parallels the Carquinez Strait for its entire route. Originally, this segment was part of I-680 before that Interstate was extended and rerouted to Fairfield. The city-maintained Curtola Parkway continues west from I-80 to State Route 29 (SR 29) in Vallejo.
Interstate 680 (I-680) is a north–south auxiliary Interstate Highway in Northern California. It curves around the eastern cities of the San Francisco Bay Area from San Jose to I-80 at Fairfield, bypassing cities along the eastern shore of San Francisco Bay such as Oakland and Richmond while serving others more inland such as Pleasanton and Concord.
Route 710, consisting of the non-contiguous segments of State Route 710 (SR 710) and Interstate 710 (I-710), is a major north–south state highway and auxiliary Interstate Highway in the Los Angeles metropolitan area of the U.S. state of California. Also called the Los Angeles River Freeway prior to November 18, 1954, the highway was initially planned to connect Long Beach and Pasadena, but a gap in the route exists from Alhambra to Pasadena through South Pasadena due to community opposition to its construction.
State Route 57 (SR 57), also known as the Orange Freeway for most of its length, is a north–south state highway in the Greater Los Angeles Area of the U.S. state of California. It connects the interchange of Interstate 5 (I-5) and SR 22 near downtown Orange, locally known as the Orange Crush, to the Glendora Curve interchange with I-210 and SR 210 in Glendora. The highway provides a route across several spurs of the Peninsular Ranges, linking the Los Angeles Basin with the Pomona Valley and San Gabriel Valley.
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.
State Route 160 is a state highway in the U.S. state of California consisting of two sections. The longer, southern, section is a scenic highway through the alluvial plain of the Sacramento River, linking SR 4 in Antioch with Sacramento via the Antioch Bridge. The northern section, separated from the southern by Sacramento city streets, is the North Sacramento Freeway, running from the 16th Street Bridge over the American River to Interstate 80 Business towards Roseville.
State Route 67 (SR 67) is a state highway in San Diego County, California, United States. It begins at Interstate 8 (I-8) in El Cajon and continues to Lakeside as the San Vicente Freeway before becoming an undivided highway through the eastern part of Poway. In the town of Ramona, the route turns into Main Street before ending at SR 78. SR 67 provides direct access from the city of San Diego to the East County region of San Diego County, including Ramona and Julian.
State Route 275 is an unsigned state highway connecting West Sacramento, California and Downtown Sacramento. Since 1996, the highway has been legally defined to be the length of the Tower Bridge crossing the Sacramento River. Prior to that year, SR 275 was also known as the West Sacramento Freeway, and was a short spur connecting Interstate 80 Business / U.S. Route 50 in West Sacramento, and the Tower Bridge. SR 275 also extended east into Sacramento along the Capitol Mall from the bridge to 9th Street, just west of the California State Capitol. West Sacramento completed a project to replace the freeway with a pedestrian-friendly street named Tower Bridge Gateway.
State Route 905 (SR 905), also known as the Otay Mesa Freeway, is an 8.964-mile-long (14.426 km) state highway in San Diego, in the southwestern part of the U.S. state of California. It connects I-5 and I-805 in San Ysidro to the Mexican border at Otay Mesa. The entire highway from I-5 to the international border is a freeway with a few exits that continues east from the I-805 interchange before turning southeast and reaching the border.
State Route 209 (SR 209) was a state highway in the U.S. state of California, connecting Cabrillo National Monument with the interchange of Interstate 5 (I-5) and I-8 in San Diego, passing through the neighborhoods of Point Loma. The majority of the route was along Rosecrans Street; it also included Cañon Street and Catalina Boulevard leading to the tip of Point Loma.
State Route 19 is a state highway in the U.S. state of California, running along Lakewood Boulevard and Rosemead Boulevard in the Los Angeles area. An additional "hidden" state highway, State Route 164, is also signed as part of SR 19, despite having a legal description separate from Route 19. The combined route is a north–south four-to-six lane suburban roadway, lying east of the Long Beach Freeway and west of the San Gabriel River Freeway, and connecting the eastern parts of Long Beach and Pasadena via the Whittier Narrows. Under their legal descriptions, SR 19 runs north to Gallatin Road in Pico Rivera, then SR 164 goes from Gallatin Road to Pasadena. Since 1998, several pieces have been relinquished to local governments, and more transfers are authorized by state law.
State Route 371 is a state highway in Riverside County, California, serving as a 20.75-mile (33.39 km) connector from SR 79 near Aguanga to SR 74 near Anza. The highway crosses through the private community of Lake Riverside, as well as Cahuilla and the Cahuilla Indian Reservation. It is the primary road running through Anza but mostly serves rural areas.
State Route 47 is a state highway in the U.S. state of California, connecting Terminal Island to the mainland in the Los Angeles area. From its south end at I-110 in San Pedro, it heads east across the Vincent Thomas Bridge to the island and the end of state maintenance. The state highway begins again at the junction with I-710 on Terminal Island, crossing the Schuyler Heim Bridge north to the mainland and the second terminus, where SR 103 begins. Signage continues along a locally maintained route, mainly Alameda Street, to the Gardena Freeway in Compton, and an unconstructed alignment follows the same corridor to the Santa Monica Freeway (I-10) near downtown Los Angeles.
State Route 115 is a state highway in the U.S. state of California. It runs in Imperial County from Interstate 8 (I-8) southeast of Holtville to SR 111 in Calipatria. The routing was added to the state highway system in 1933, and was constructed by 1934; SR 115 was officially designated in the 1964 state highway renumbering.
State Route 244 is an unsigned state highway in the U.S. state of California located northeast of Sacramento. It serves as a short freeway connection between the Interstate 80/Interstate 80 Business junction and Auburn Boulevard. SR 244 was first added to the state highway system in 1959 as Legislative Route 288, and was renumbered as SR 244 in the 1964 renumbering. Portions of this route have been removed from the system as recently as 1994.
State Route 213 is a state highway in the U.S. state of California, in Los Angeles County. The California State Legislature has designated the route as Western Avenue from 25th Street in San Pedro north to the San Diego Freeway in Torrance. From 25th Street to Carson Street, the California Transportation Commission has officially adopted Western Avenue as a state highway. The segment of Western Avenue from 25th Street south to Paseo del Mar may have SR 213 signage but is not legally part of the highway. The northerly two miles from Carson Street to Interstate 405 has also not yet been adopted and remains a city street. Beyond Interstate 405, Western Avenue, continues through Torrance, Gardena, and Los Angeles to Los Feliz Boulevard in Hollywood as a city street.
Junipero Serra Boulevard is a major boulevard in and south of San Francisco named after Franciscan friar Junipero Serra. Within the city, it forms part of the route of State Route 1, the shortest connection between Interstate 280 and the Golden Gate Bridge. The remainder, in San Mateo County, was bypassed or replaced by I-280, the Junipero Serra Freeway. The boulevard was one of several new roads built along the San Francisco Peninsula before the age of freeways, and became a state highway known as Route 237 in 1956, receiving the State Route 117 designation in the 1964 renumbering, only to be deleted from the state highway system the next year. Two other regional highways—Bayshore Highway and Skyline Boulevard—were also upgraded into or bypassed by freeways.
References
1 2 3 4 5 6 Showley, Roger (October 3, 1993). "Forget the Switzer Canyon Freeway (proposed in 1926)". San Diego Union-Tribune. p.H8.
↑ 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.
↑ Riverside County Road Atlas (Map). Thomas Brothers. 2009.
↑ California Division of Highways (1969). State Highway Map: California (Map). Scale not given. Sacramento: California Division of Highways. San Diego inset.
↑ California Division of Highways (1970). State Highway Map: California (Map). Scale not given. Sacramento: California Division of Highways. San Diego inset.
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