List of Interstate Highways in California

This is a list of Interstates in the U.S. state of California that have existed since the 1964 renumbering. It includes routes that were defined by the California State Legislature but never built, as well as routes that have been entirely relinquished to local governments.

Interstate Highways in California
Standard Interstate signage in California
Highway names
InterstatesInterstate XX (I-XX)
US HighwaysU.S. Route XX (US XX)
StateState Route XX (SR XX)
System links

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.

Overview

  • 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.
  • If a route was renumbered, the old or new number is given in the "notes" column.
  • The years 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.

Primary Interstates

Number Length (mi)[3][lower-alpha 1] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-5 796.4321,281.733 Mexican border in San Ysidro, San DiegoI-5 at the Oregon state line 1947 current
I-5E I-5 near TracyI-5 near Dunnigan 1957 1970 Former designation of I-5 when I-5W existed
I-5W I-5 near TracyI-5 near Dunnigan 1957 1970 Former designation of I-580 and I-505
Future I-7 302486 I-5 at Wheeler RidgeI-5 in Stockton proposed Caltrans has proposed I-7 or I-9 for SR 99 in central California
I-8 171.98276.77 Nimitz Boulevard, Sunset Cliffs Boulevard in San DiegoI-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
Future I-9 302486 I-5 at Wheeler RidgeI-5 in Stockton proposed Caltrans has proposed I-7 or I-9 for SR 99 in central California
I-10 243.31[lower-alpha 2]391.57 SR 1 in Santa MonicaI-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
I-15 287.26[lower-alpha 3]462.30 I-8 in San DiegoI-15 at the Nevada state line 1957 current
I-15E I-15 in TemeculaI-15 in Devore, California 1973 1982 Renumbered from I-215 in 1973 and back to I-215 in 1982
I-15W I-15 in MurrietaI-15 in Devore, California 1972 1974 Temporary Signage along current I-15
I-40 154.623248.842 I-15 in BarstowI-40 at the Arizona state line 1947 current
I-80 205.07330.03 US 101 in San FranciscoI-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
  •       Former
  •       Future

Auxiliary Interstates

Number Length (mi)[3][lower-alpha 1] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-105 18.8230.29 SR 1 in El SegundoI-605 in Norwalk 1982 current Right-of-way formerly planned as part of SR 42
I-105 I-5 in East Los AngelesUS 101 in Los Angeles 1964 1968 Renumbered as US 101; part of East Los Angeles Interchange
I-110 23.73[lower-alpha 3]38.19 SR 47 in San PedroI-10 in Los Angeles 1978 current Former routing of US 6/SR 11
I-110 I-10/I-5 in East Los AngelesUS 101 in Los Angeles 1964 1968 Deleted from highway system; part of East Los Angeles Interchange
I-180 US 101 in San RafaelI-80 in Berkeley 1981 1991 Former designation of I-580
I-205 12.97320.878 I-580 near TracyI-5 near Manteca 1970 current Formerly part of US 50
I-210 44.90[lower-alpha 3]72.26 I-5 in Los AngelesSR 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
I-215 55.06088.610 I-15 in MurrietaI-15 in San Bernardino 1982 current Formerly I-15E and SR 215
I-238 2.126[lower-alpha 3]3.421 I-580 in Castro ValleyI-880 in San Leandro 1983 current Technically a spur of I-80; only violation in the Interstate system
I-280 57.51092.553 US 101/I-680 in San JoseKing and 5th Streets in San Francisco 1955 current
I-305 5.649.08 I-80 in West SacramentoSR 99 in Sacramento 1981 current Unsigned designation used by the FHWA and the AASHTO; signed as part of US 50
I-380 1.672.69 I-280 in San BrunoUS 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
I-405 72.415116.541 I-5 in IrvineI-5 near San Fernando 1964 current
I-480 US 101 in San FranciscoI-80 in San Francisco 1957 1968 Demoted to state highway in 1968
I-505 32.9953.09 I-80 in VacavilleI-5 near Dunnigan 1977 current Formerly part of I-5W
I-580 75.550[lower-alpha 2]121.586 US 101 in San RafaelI-5 near Tracy 1947 current Various segments formerly part of US 50, I-5W or SR 17
I-605 27.4044.10 I-405/SR 22 in Seal BeachI-210 in Irwindale 1964 current
I-680 70.536113.517 US 101/I-280 in San JoseI-80 in Fairfield 1955 current Formerly part of SR 21
I-710 24.249[lower-alpha 4]39.025 SR 47 in Long BeachValley 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
I-780 6.75910.878 I-80 in VallejoI-680 in Benicia 1976 current Formerly part of I-680
I-805 28.01645.087 I-5 in San Ysidro, San DiegoI-5 in Sorrento Valley, San Diego 1959 current
I-880 45.69873.544 I-280/SR 17 in San JoseI-80/I-580 in Oakland 1984 current Formerly part of SR 17
I-905 8.96414.426 I-5 in San DiegoMexican broder near Otay Mesa proposed Currently SR 905
I-980 2.0273.262 I-880 in OaklandI-580/SR 24 in Oakland 1981 current Right-of-way formerly part of SR 24
  •       Former
  •       Future

Business Routes

Number Length (mi)[3][lower-alpha 1] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-5 BL I-5 in San YsidroI-5 in Chula Vista c.1960 1990 old US 101 along Beyer Boulevard, Broadway, Harbor Drive, and Pacific Highway.
I-5 BL I-5 in San DiegoI-5 in San Diego 2005 old US 101 along Mission Bay Drive.
I-5 BL I-5 in San DiegoI-5 in Oceanside c.1960 current old US 101 along Coast Highway (CR S-21).
I-5 BL I-5 in GlendaleI-5 in Granada Hills c.1970 1980 travels along San Fernando Road (old US 99 and US 6).
I-5 BL I-5 in WoodlandI-5 in Woodland c.1970 1980 Between I-5 Exits 537 and 540.
I-5 BL 1.11.8 I-5 in ArbuckleI-5 in Arbuckle Between I-5 Exits 566 and 567.
I-5 BL I-5 in WilliamsI-5 in Maxwell Between I-5 Exits 575 and 588.
I-5 BL I-5 in WillowsI-5 in Orland Between I-5 Exits 601 and 621.
I-5 BL 4.26.8 I-5 in Red BluffI-5 in Red Bluff Between I-5 Exits 647 and 651.
I-5 BL I-5 in CottonwoodI-5 in Cottonwood old US 99 between I-5 Exits 662 and 665.
I-5 BL 3.76.0 I-5 in DunsmuirI-5 in Dunsmuir old US 99 along Dunsmuir Avenue between I-5 Exits 729 and 732.
I-5 BL 3.86.1 I-5 in Mount ShastaI-5 in Mount Shasta Between I-5 Exits 647 and 651.
I-5 BL I-5 in WeedI-5 in Weed old US 99 between I-5 Exits 747 and 748.
I-5 BL I-5 in YrekaI-5 in Yreka Between I-5 Exits 773 and 776.
I-8 BL I-8 in San DiegoI-8 in La Mesa c.1970 1995 Between I-8 Exits 4B-C and 13A (Washington Street, Normal Street, El Cajon Boulevard)
I-8 BL 8.1513.12 I-8 in El CajonI-8 in Lakeside Between I-8 Exits 15 and 23
I-8 BL 4.256.84 I-8 in AlpineI-8 in Alpine former US 80 along Alpine Drive between I-8 Exits 30 and 33
I-8 BL 4.256.84 I-8 in El CentroI-8 in El Centro Between I-8 Exits 114 and 115
I-8 BL 2.183.51 I-8 in AlpineBus.I-8 in Yuma, AZ Historic US 80 between I-8 Exit 170 and AZ line
I-10 BL 7.912.7 I-10 in PomonaI-10 in Ontario former US 70/US 99 between I-10 Exits 42B and 55A
I-10 BL I-10 in FontanaI-10 in Colton former US 70/US 99 between I-10 Exits 59 and 71
I-10 BL I-10 in ColtonI-10 in Coachella former US 60/US 70/US 99 between I-10 Exits 139 and 146
I-10 BL 7.912.7 I-10 in BlytheI-10 in Blythe former US 60/US 70 between I-10 Exits 236 and 243
I-15 BL I-15 in EscondidoI-15 in Escondido former US 395 between I-15 Exits 28 and 34
I-15 BL I-15 in Lake ElsinoreI-15 in Lake Elsinore Between I-15 Exits 73 and 75
I-15 BL I-15 in NorcoI-15 in Norco Between I-15 Exits 98 and 100
I-15 BL I-15 in VictorvilleI-15 in Victorville Historic US 66/US 91 between I-15 Exits 150 and 153A
I-15 BL I-15 in BarstowI-15 in Barstow Historic US 66/US 91 between I-15 Exits 181 and 184B
I-15 BL 3.65.8 I-15 in BakerI-15 in Baker Old US 91/US 466 between I-15 Exits 245 and 248
I-40 BL 3.45.5 I-40 in NeedlesI-40 in Needles Old US 66/US 95 between I-40 Exits 141 and 145
I-80 BL 13.8222.24 I-80 in West SacramentoI-80 in Sacramento c.1980 current Between I-80 Exits 82 and 95
I-205 BL I-205 in TracyI-5 in Lathrop Old US 50 between I-205 Exit 4 and I-5 Exit 458B
  •       Former
  •       Future

See also

  •  California Roads portal

Notes

  1. Lengths rounded to the nearest mile or tenth-mile are estimated from various sources including Google Maps.
  2. This route is broken into pieces, and the length does not reflect the overlaps that would be required to make the route continuous.
  3. Part of one of the contiguous routes that is partially signed as an Interstate Highway, while the remaining segment is signed as a state highway.
  4. This route is broken into pieces due to a gap in the description, unfilled by any route.

References

  1. "Section 231" . California Streets and Highways Code via Wikisource.
  2. California Department of Transportation. "Other State Highway Routes". Sacramento: California Department of Transportation.
  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.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.