Interstate Highways in California | |
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Highway shields for I-5, I-580, and I-80 Bus. Loop | |
Interstate Highways highlighted in red; related state routes in purple | |
System information | |
Maintained by Caltrans | |
Length | 2,466.744 mi (3,969.840 km) |
Highway names | |
Interstates | Interstate XX (I-XX) |
Business Loop | Interstate XX Business Loop (I-XX Bus.) |
System links | |
This is a list of Interstate Highways in the U.S. state of California that have existed since the 1964 renumbering. It includes routes defined by the California State Legislature but never built, as well as routes entirely relinquished to local governments.
Each state highway in California is maintained by the California Department of Transportation (Caltrans) and is assigned a Route (officially State Highway Route [1] [2] ) number in the Streets and Highways Code (Sections 300-635). Under the code, the state assigns a unique Route X to each highway and does not differentiate between state, US, or Interstate highways.
Lengths for each state route were initially measured as they were during the 1964 state highway renumbering (or during the year the route was established, if after 1964) based alignment that existed at the time, and do not necessarily reflect the current mileage. Portions of some routes have been relinquished to or are otherwise maintained by local or other governments, and may not be included in the length listed below. Several routes are broken into non-contiguous pieces, and their lengths may not reflect the overlaps that would be required to make them continuous. Some routes may also have a gap because it is either explicitly defined in the California Streets and Highways Code or due to an unconstructed portion, and the listed length may or may not reflect the gap. Additionally, if a route was renumbered, the old or new number is given in the "notes" column. Years shown are when legislative action was taken, not when real-world changes were made.
Concurrences are not explicitly codified in the Streets and Highways Code; such highway segments are listed on only one of the corresponding legislative route numbers—for example, the I-80/I-580 concurrency, known as the Eastshore Freeway, is only listed under Route 80 in the highway code while the definition of Route 580 is broken into non-contiguous segments. When a highway is broken into such segments, the total length recorded by Caltrans only reflects those non-contiguous segments, and does not include those overlaps that would be required to make the route continuous.
Since the 1990s, a number of piecemeal relinquishments have been made. These are generally reflected in the length but not the termini. Former termini are not shown if they are along the current route, meaning that the route was simply extended.
One Interstate Highway—Interstate 305—is defined only federally; the state calls it part of US 50. It was signed as part of Business Interstate 80, the only state-maintained Interstate business route in California.
Number | Length (mi) [3] [lower-alpha 1] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
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![]() | 796.432 | 1,281.733 | Mexican border in San Ysidro, San Diego | I-5 at the Oregon state line | 1947 | current | ||
![]() | — | — | I-5 near Tracy | I-5 near Dunnigan | 1957 | 1970 | Former designation of I-5 when I-5W existed | |
![]() | — | — | I-5 near Tracy | I-5 near Dunnigan | 1957 | 1970 | Former designation of I-580 and I-505 | |
![]() | 302 | 486 | I-5 at Wheeler Ridge | I-5 in Stockton | proposed | — | Caltrans has proposed I-7 or I-9 for SR 99 in central California | |
![]() | 171.98 | 276.77 | Nimitz Boulevard, Sunset Cliffs Boulevard in San Diego | I-8 at the Arizona state line | 1964 | current | Westernmost segment between Nimitz Boulevard/Sunset Cliffs Boulevard and I-5 is not officially recognized as an Interstate by the FHWA | |
![]() | 302 | 486 | I-5 at Wheeler Ridge | I-5 in Stockton | proposed | — | Caltrans has proposed I-7 or I-9 for SR 99 in central California | |
![]() | 243.31 [lower-alpha 2] | 391.57 | SR 1 in Santa Monica | I-10 at the Arizona state line | 1947 | current | Route 10, as defined by the state, is broken into two segments at the East Los Angeles Interchange; traffic is directed via I-5 to connect the two; the portion between I-5 and US 101 not signed | |
![]() | 287.26 [lower-alpha 3] | 462.30 | I-8 in San Diego | I-15 at the Nevada state line | 1957 | current | ||
![]() | — | — | I-15 in Temecula | I-15 in Devore, California | 1973 | 1982 | Renumbered from I-215 in 1973 and back to I-215 in 1982 | |
![]() | — | — | I-15 in Murrieta | I-15 in Devore, California | 1972 | 1974 | Temporary Signage along current I-15 | |
![]() | 154.623 | 248.842 | I-15 in Barstow | I-40 at the Arizona state line | 1947 | current | ||
![]() | 205.07 | 330.03 | US 101 in San Francisco | I-80 at the Nevada state line | 1947 | current | Westernmost segment between US 101 and the Bay Bridge is not officially recognized as an Interstate by the FHWA | |
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Number | Length (mi) [3] [lower-alpha 1] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
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![]() | 18.82 | 30.29 | SR 1 in El Segundo | I-605 in Norwalk | 1982 | current | Right-of-way formerly planned as part of SR 42 | |
![]() | — | — | I-5 in East Los Angeles | US 101 in Los Angeles | 1964 | 1968 | Renumbered as US 101; part of East Los Angeles Interchange | |
![]() | 23.73 [lower-alpha 3] | 38.19 | SR 47 in San Pedro | I-10 in Los Angeles | 1978 | current | Former routing of US 6/SR 11 | |
![]() | — | — | I-10/I-5 in East Los Angeles | US 101 in Los Angeles | 1964 | 1968 | Deleted from highway system; part of East Los Angeles Interchange | |
![]() | — | — | US 101 in San Rafael | I-80 in Berkeley | 1981 | 1991 | Former designation of I-580 | |
![]() | 12.973 | 20.878 | I-580 near Tracy | I-5 near Manteca | 1970 | current | Formerly part of US 50 | |
![]() | 44.90 [lower-alpha 3] | 72.26 | I-5 in Los Angeles | SR 57 in Glendora | 1964 | current | Entire length of SR 210 to be renumbered to I-210. SR 57 from I-10 to I-210/SR 210 is an unsigned designation of I-210 used by the FHWA and AASHTO | |
![]() | 55.060 | 88.610 | I-15 in Murrieta | I-15 in San Bernardino | 1982 | current | Formerly I-15E and SR 215 | |
![]() | 2.126 [lower-alpha 3] | 3.421 | I-580 in Castro Valley | I-880 in San Leandro | 1983 | current | Technically a spur of I-80; only violation in the Interstate system | |
![]() | 57.510 | 92.553 | US 101/I-680 in San Jose | King and 5th Streets in San Francisco | 1955 | current | ||
![]() | 5.64 | 9.08 | I-80 in West Sacramento | SR 99 in Sacramento | 1981 | current | Unsigned designation used by the FHWA and the AASHTO; signed as part of US 50 | |
![]() | 1.67 | 2.69 | I-280 in San Bruno | US 101 in South San Francisco | 1964 | current | Formerly proposed to be extended west to SR 1 and east along the Southern Crossing to I-880 | |
![]() | 72.415 | 116.541 | I-5 in Irvine | I-5 near San Fernando | 1964 | current | ||
![]() | — | — | US 101 in San Francisco | I-80 in San Francisco | 1957 | 1968 | Demoted to state highway in 1968 | |
![]() | 32.99 | 53.09 | I-80 in Vacaville | I-5 near Dunnigan | 1977 | current | Formerly part of I-5W | |
![]() | 75.550 [lower-alpha 2] | 121.586 | US 101 in San Rafael | I-5 near Tracy | 1947 | current | Various segments formerly part of US 50, I-5W or SR 17 | |
![]() | 27.40 | 44.10 | I-405/SR 22 in Seal Beach | I-210 in Irwindale | 1964 | current | ||
![]() | 70.536 | 113.517 | US 101/I-280 in San Jose | I-80 in Fairfield | 1955 | current | Formerly part of SR 21 | |
![]() | 24.249 [lower-alpha 4] | 39.025 | SR 47 in Long Beach | Valley Boulevard in Alhambra | 1984 | current | Formerly part of SR 7. The portions north of I-10 and south of SR 1 are not officially recognized as Interstates by the FHWA | |
![]() | 6.759 | 10.878 | I-80 in Vallejo | I-680 in Benicia | 1976 | current | Formerly part of I-680 | |
![]() | 28.016 | 45.087 | I-5 in San Ysidro, San Diego | I-5 in Sorrento Valley, San Diego | 1959 | current | ||
![]() | 45.698 | 73.544 | I-280/SR 17 in San Jose | I-80/I-580 in Oakland | 1984 | current | Formerly part of SR 17 | |
![]() | 8.964 | 14.426 | I-5 in San Diego | Mexican border near Otay Mesa | proposed | — | Currently SR 905 | |
![]() | 2.027 | 3.262 | I-880 in Oakland | I-580/SR 24 in Oakland | 1981 | current | Right-of-way formerly part of SR 24 | |
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Number | Length (mi) [3] [lower-alpha 1] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
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![]() | — | — | I-5 in San Ysidro | I-5 in Chula Vista | 1960 | c.1990 | old US 101 along Beyer Boulevard, Broadway, Harbor Drive, and Pacific Highway. | |
![]() | — | — | I-5 in San Diego | I-5 in San Diego | — | 2005 | old US 101 along Mission Bay Drive. | |
![]() | — | — | I-5 in San Diego | I-5 in Oceanside | 1960 | c.current | old US 101 along Coast Highway (CR S-21). | |
![]() | — | — | I-5 in Glendale | I-5 in Granada Hills | 1970 | c.1980 | travels along San Fernando Road (old US 99 and US 6). | |
![]() | — | — | I-5 in Woodland | I-5 in Woodland | 1970 | c.1980 | Between I-5 Exits 537 and 540. | |
![]() | 1.1 | 1.8 | I-5 in Arbuckle | I-5 in Arbuckle | — | — | Between I-5 Exits 566 and 567. | |
![]() | — | — | I-5 in Williams | I-5 in Maxwell | — | — | Between I-5 Exits 575 and 588. | |
![]() | — | — | I-5 in Willows | I-5 in Orland | — | — | Between I-5 Exits 601 and 621. | |
![]() | 4.2 | 6.8 | I-5 in Red Bluff | I-5 in Red Bluff | — | — | Between I-5 Exits 647 and 651. | |
![]() | — | — | I-5 in Cottonwood | I-5 in Cottonwood | — | — | old US 99 between I-5 Exits 662 and 665. | |
![]() | 3.7 | 6.0 | I-5 in Dunsmuir | I-5 in Dunsmuir | — | — | old US 99 along Dunsmuir Avenue between I-5 Exits 729 and 732. | |
![]() | 3.8 | 6.1 | I-5 in Mount Shasta | I-5 in Mount Shasta | — | — | Between I-5 Exits 647 and 651. | |
![]() | — | — | I-5 in Weed | I-5 in Weed | — | — | old US 99 between I-5 Exits 747 and 748. | |
![]() | — | — | I-5 in Yreka | I-5 in Yreka | — | — | Between I-5 Exits 773 and 776. | |
![]() | — | — | I-8 in San Diego | I-8 in La Mesa | 1970 | c.1995 | Between I-8 Exits 4B-C and 13A (Washington Street, Normal Street, El Cajon Boulevard) | |
![]() | 8.15 | 13.12 | I-8 in El Cajon | I-8 in Lakeside | — | — | Between I-8 Exits 15 and 23 | |
![]() | 4.25 | 6.84 | I-8 in Alpine | I-8 in Alpine | — | — | former US 80 along Alpine Drive between I-8 Exits 30 and 33 | |
![]() | 4.25 | 6.84 | I-8 in El Centro | I-8 in El Centro | — | — | Between I-8 Exits 114 and 115 | |
![]() | 2.18 | 3.51 | I-8 in Alpine | Bus.I-8 in Yuma, AZ | — | — | Historic US 80 between I-8 Exit 170 and AZ line | |
![]() | 7.9 | 12.7 | I-10 in Pomona | I-10 in Ontario | — | — | former US 70/US 99 between I-10 Exits 42B and 55A | |
![]() | — | — | I-10 in Fontana | I-10 in Colton | — | — | former US 70/US 99 between I-10 Exits 59 and 71 | |
![]() | — | — | I-10 in Colton | I-10 in Coachella | — | — | former US 60/US 70/US 99 between I-10 Exits 139 and 146 | |
![]() | 7.9 | 12.7 | I-10 in Blythe | I-10 in Blythe | — | — | former US 60/US 70 between I-10 Exits 236 and 243 | |
![]() | — | — | I-15 in Escondido | I-15 in Escondido | — | — | former US 395 between I-15 Exits 28 and 34 | |
![]() | — | — | I-15 in Lake Elsinore | I-15 in Lake Elsinore | — | — | Between I-15 Exits 73 and 75 | |
![]() | — | — | I-15 in Norco | I-15 in Norco | — | — | Between I-15 Exits 98 and 100 | |
![]() | — | — | I-15 in Victorville | I-15 in Victorville | — | — | Historic US 66/US 91 between I-15 Exits 150 and 153A | |
![]() | — | — | I-15 in Barstow | I-15 in Barstow | — | — | Historic US 66/US 91 between I-15 Exits 181 and 184B | |
![]() | 3.6 | 5.8 | I-15 in Baker | I-15 in Baker | — | — | Old US 91/US 466 between I-15 Exits 245 and 248 | |
![]() | 3.4 | 5.5 | I-40 in Needles | I-40 in Needles | — | — | Old US 66/US 95 between I-40 Exits 141 and 145 | |
![]() | 13.82 | 22.24 | I-80 in West Sacramento | I-80 in Sacramento | 1980 | c.current | Between I-80 Exits 82 and 95 | |
![]() | — | — | I-205 in Tracy | I-5 in Lathrop | — | — | Old US 50 between I-205 Exit 4 and I-5 Exit 458B | |
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Interstate 580 (I-580) is an approximately 76-mile-long (122 km) east–west auxiliary Interstate Highway in Northern California. The heavily traveled spur route of I-80 runs from US Route 101 (US 101) in San Rafael in the San Francisco Bay Area to I-5 at a point outside the southern city limits of 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.
The state highway system of the U.S. state of California is a network of highways that are owned and maintained by the California Department of Transportation (Caltrans).
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 13 is a state highway in the U.S. state of California. It runs entirely in Alameda County, connecting Interstate 580 in Oakland to Interstate 80/Interstate 580 in Berkeley.
Route 238, consisting of State Route 238 (SR 238) and Interstate 238 (I-238), is a mostly north–south state and auxiliary Interstate highway in the San Francisco Bay Area of California. The southern segment is signed as SR 238 and is a divided multilane surface highway that runs parallel to the Hayward hills between I-680 in Fremont and I-580 in Castro Valley. The northern segment is signed as I-238 and is a six-lane freeway that runs more east–west between I-580 and I-880 in San Leandro.
State Route 60 (SR 60) is an east–west state highway in the U.S. state of California. It serves the cities and communities on the eastern side of the Los Angeles metropolitan area and runs along the south side of the San Gabriel Valley. It functions as a bypass route of Interstate 10 (I-10) through the area between the East Los Angeles Interchange in Los Angeles and Beaumont. SR 60 provides a route across several spurs of the Peninsular Ranges, linking the Los Angeles Basin with the Pomona Valley and San Gabriel Valley. The highway also runs concurrently with SR 57 and I-215. Portions of SR 60 are designated as either the Pomona Freeway or the Moreno Valley Freeway.
State Route 237 is a state highway in the U.S. state of California that runs from El Camino Real in Mountain View to Interstate 680 in Milpitas. Known as the Southbay Freeway for most of its length, SR 237 runs south of the San Francisco Bay, connecting the East Bay to the Peninsula.
State Route 123 is a 7.39-mile (11.89 km) state highway in the U.S. state of California in the San Francisco Bay Area. Named San Pablo Avenue for almost its entire length except for its northernmost 0.10 miles (0.16 km), SR 123 is a major north–south state highway along the flats of the urban East Bay. Route 123 runs between Interstate 580 in Oakland in the south and Interstate 80 at Cutting Boulevard in Richmond in the north. San Pablo Avenue itself, a portion of Historic US 40, continues well past the SR 123 designation south to Downtown Oakland and north to Crockett.
State Route 39 is a state highway in the U.S. state of California that travels through Orange and Los Angeles counties. Its southern terminus is at Pacific Coast Highway, in Huntington Beach. SR 39's northern terminus is at Islip Saddle on Angeles Crest Highway in the Angeles National Forest, but its northernmost 4.5-mile (7.2 km) segment has been closed to public highway traffic since 1978 due to a massive mud and rockslide.
State Route 84 is a state highway in the U.S. state of California that consists of two unconnected segments, one in the San Francisco Bay Area and the other primarily in the Sacramento–San Joaquin River Delta area.
The Foothill Freeway is a freeway in the Los Angeles metropolitan area, California, United States, running from the Sylmar district of Los Angeles east to Redlands. The western segment is signed as Interstate 210 (I-210) from its western end at I-5 to SR 57 in Glendora, while the eastern segment is signed as State Route 210 (SR 210) to its eastern terminus at I-10. Under the California Streets and Highways Code, the entire Foothill Freeway is legally referred to as Route 210.
State Route 66 is a state highway in the U.S. state of California that runs along a section of old U.S. Route 66 in Los Angeles and San Bernardino counties. It goes from State Route 210 in La Verne east to Interstate 215 in San Bernardino, passing through Claremont, Upland, Rancho Cucamonga, Fontana and Rialto along Foothill Boulevard. In San Bernardino, it is the part of Fifth Street west of H Street.
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.
State Route 132 is a state highway in the U.S. state of California that connects the Central Valley with the Sierra Nevada foothills and the California Gold Country. Its western segment also connects the city of Modesto with the San Francisco Bay Area via I-580, although this route is discouraged due to it being a two-lane road between Modesto and Interstate 5. East of Modesto, the road climbs the foothills and eventually ends at SR 49 at Coulterville.
State Route 185 is a state highway in the San Francisco Bay Area of the U.S. state of California. It runs along sections of Mission Boulevard in Hayward, East 14th Street in San Leandro and International Boulevard in Oakland. At its south end, SR 185 connects with State Routes 92 and 238 in Hayward. At the north end of SR 185 at International Boulevard and 42nd Avenue, the short State Route 77 heads southwest to Interstate 880.
State Route 127 is a state highway in the U.S. state of California that connects Interstate 15 in Baker to Nevada State Route 373 at the Nevada state line, passing near the eastern boundary of Death Valley National Park. The entire length of the highway closely follows the central portion of the former Tonopah and Tidewater Railroad and loosely follows the Amargosa River.
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.
Interstate 80 (I-80) is a transcontinental Interstate Highway in the United States, stretching from San Francisco, California, to Teaneck, New Jersey. The segment of I-80 in California runs east from San Francisco across the San Francisco–Oakland Bay Bridge to Oakland, where it turns north and crosses the Carquinez Bridge before turning back northeast through the Sacramento Valley. I-80 then traverses the Sierra Nevada, cresting at Donner Summit, before crossing into the state of Nevada within the Truckee River Canyon. The speed limit is at most 65 mph (105 km/h) along the entire route instead of the state's maximum of 70 mph (110 km/h) as most of the route is in either urban areas or mountainous terrain. I-80 has portions designated as the Eastshore Freeway and Alan S. Hart Freeway.