AARoads:United States/California/History/Interregional Road System

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I believe this to be a full chronology of the changes to the Interregional Road System, referenced to state laws. Of course there may be typos or misinterpretations, and I may have missed some routes that were removed and later re-added. --NE2 02:16, 6 January 2008 (UTC)

Year Law Now From To High Emphasis Focus NHS Notes
1989 105 1 San Juan Capistrano (I-5) Leggett (US 101) yes, Monterey to Santa Cruz yes, Monterey to Santa Cruz
1989 105 2 LA-LB urban SR 138
1989 105 4 Antioch-Pittsburg urban Markleeville (SR 89)
1989 105 5 Mexico Oregon yes yes yes
1989 105 6 Bishop (US 395) Nevada yes yes
1996 1154 7 Mexico El Centro (I-8) yes yes yes
1989 105 8 San Diego (Sunset Cliffs Boulevard) Arizona yes yes yes
1989 105 9 Santa Cruz urban San Jose urban
1989 105 10 SB-Riverside urban Arizona yes yes yes
1989 105 12 Valley Ford (SR 1) San Andreas (SR 49) yes, Fairfield to Clements
1989 105 14 Santa Monica (SR 1) Little Lake (US 395) yes, north of Tunnel Station yes, north of Tunnel Station yes, north of Tunnel Station
1989 105 15 San Diego (I-5) Nevada yes yes yes
1989 105 16 Sacramento urban Drytown (SR 49)
1989 105 17 Santa Cruz urban San Jose urban yes
1989 105 18 SB-Riverside urban Victorville (I-15)
1996 1154 18 Victorville (I-15) Pearblossom (SR 138) yes
1989 105 20 Fort Bragg (SR 1) Emigrant Gap (I-80) yes, Ukiah to Upper Lake and Lower Lake to Emigrant Gap yes, Ukiah to Upper Lake and Lower Lake to Emigrant Gap yes, Ukiah to Upper Lake and Lower Lake to Emigrant Gap
1996 1154 25 SR 146 Gilroy (US 101)
1989 105 28 Tahoe City (SR 89) Nevada
1989 105 29 Vallejo (I-80) Upper Lake (SR 20) yes, Lower Lake to Upper Lake yes, Lower Lake to Upper Lake yes, Vallejo to Napa and Lower Lake to Upper Lake
1989 105 36 Red Bluff (I-5) Johnsonville (US 395) yes, connections at the ends only yes, connections at the ends only yes, connections at the ends only
1989 105 37 SFO urban (Novato) SFO urban (Vallejo) yes
1989 105 38 SB-Riverside urban Big Bear Lake west end (SR 18)
1989 105 40 Needles (I-15) Arizona yes yes yes
1989 105 41 Morro Bay (SR 1) Yosemite National Park yes, Cholame to Yosemite yes, Cholame to Fresno yes, Cholame to Yosemite
1989 105 44 Redding urban Susanville (SR 36) yes yes yes
1989 105 46 Cambria (SR 1) I-5 yes, Paso Robles to I-5 yes, Paso Robles to I-5 yes, Paso Robles to I-5
1996 1154 46 I-5 Famoso (SR 99) yes
1989 105 49 Oakhurst (SR 41) Sattley (SR 89) yes, Auburn to Nevada City yes, Auburn to Nevada City
1989 105 50 West Sacramento (I-80) Nevada yes yes
1989 105 53 SR 29 SR 20 yes yes yes
1989 105 58 I-5 Barstow (I-15) yes yes yes
1989 105 62 Whitewater (I-10) Arizona
1989 105 63 Visalia urban SR 180
1989 105 65 Bakersfield urban Exeter (SR 198) yes
1996 436 65 Roseville (I-80) Yuba City (SR 99)
1989 105 68 Asilomar State Beach Salinas (US 101)
1996 1154 70 Sacramento (SR 99) Wicks Corner (SR 149) yes yes yes
1989 105 70 Wicks Corner (SR 149) Hallelujah Junction (US 395) yes
1989 105 74 San Juan Capistrano (I-5) Thousand Palms (I-10) yes, Perris to Hemet
1989 105 78 Oceanside (I-5) Blythe (I-10) yes, connection in Brawley yes, connection in Brawley yes, Oceanside to Escondido and connection in Brawley
1989 105 79 Descanso (I-8) Temecula (I-15)
1996 1154 79 Temecula (I-15) Beaumont (I-10) yes
1989 105 80 San Francisco (US 101) Nevada yes yes yes
2003 598 84 Livermore (I-580) Brentwood (SR 4)
1989 105 86 Brawley (SR 111) Indio (I-10) yes, plus Heber to Brawley (not in the IRRS) yes, plus Heber to Brawley (not in the IRRS) yes
1989 105 88 Stockton (SR 99) Nevada yes, Clements to Nevada
1989 105 89 Coleville (US 395) Mount Shasta (I-5) yes, Lassen to Mount Shasta
1996 1154 94 San Diego (I-5) Jacumba (I-8) yes, San Diego to Tecate Except in San Diego urban
1989 105 95 Blythe (I-10) Nevada yes yes, Needles to Nevada
1989 105 97 Weed (I-5) Oregon yes yes
1996 1154 98 SR 111 SR 7
1989 105 99 Wheeler Ridge (I-5) Red Bluff (SR 36) yes yes, except between SR 70 and SR 149 yes, except between SR 70 and SR 149 Via either SR 99 or SR 70 between Sacramento and Chico
1989 105 101 Los Angeles (I-5) Oregon yes yes yes
1989 105 108 Yosemite Junction (SR 120) US 395
1989 105 111 Mexico Whitewater (I-10) yes, Mexico to Brawley yes, Mexico to Brawley yes, Mexico to Brawley
1989 105 113 Davis (I-80) Woodland (I-5)
1989 105 116 Jenner (SR 1) Sebastopol (SR 12)
1989 105 120 Mossdale (I-5) Mono Lake (US 395) yes yes
1989 105 126 Oxnard-Ventura-Thousand Oaks urban I-5 yes yes
1989 105 127 Baker (I-15) Nevada
1989 105 128 Navarro River (SR 1) Davis (SR 113)
1996 1154 129 Watsonville (SR 1) US 101
1991 775 132 Vernalis (I-580) Modesto (SR 99) yes
1989 105 138 Gorman (I-5) Crestline (SR 18) yes, Gorman to Cajon Pass yes, Gorman to Pearblossom
1989 105 139 Canby (SR 299) Oregon yes yes
1989 105 140 Merced urban Yosemite National Park yes
1989 105 146 Soledad (US 101) Pinnacles National Monument
1998 877 146 Pinnacles National Monument Bear Valley (SR 25)
1989 105 149 Wicks Corner (SR 70) Chico (SR 99) yes yes yes
1989 105 152 Gilroy (US 101) Sharon (SR 99) yes yes yes
1989 105 154 Zaca (US 101) Santa Barbara (US 101)
1989 105 156 Castroville (SR 1) SR 152 yes yes, San Juan Bautista to SR 152 yes
1989 105 160 Antioch-Pittsburg urban Sacramento urban yes, Antioch-Pittsburg urban to Rio Vista
1989 105 168 Fresno urban Florence Lake Road
1989 105 168 Lake Sabrina US 395
1989 105 178 Bakersfield urban Freeman (SR 14)
1989 105 180 Fresno urban Kings Canyon National Park yes Caltrans interprets the east end as the east end of SR 180, not General Grant Grove: [1]
1996 1154 188 Mexico SR 94 yes
1989 105 190 Porterville (SR 65) Death Valley Junction (SR 127)
1989 105 198 I-5 Sequoia National Park yes yes, I-5 to Visalia yes
1989 105 199 Crescent City (US 101) Oregon yes yes
1989 105 203 Minaret Summit US 395
1989 105 205 Tracy (I-580) Tracy (I-5) yes yes yes
1989 105 207 Lake Alpine (SR 4) Mount Reba Ski Area
1989 105 215 Temecula (I-15) Devore (I-15) yes yes yes
2003 598 239 Tracy (I-580) Brentwood (SR 4)
1989 105 243 Mountain Center (SR 74) Banning (I-10)
2002 438 246 Lompoc (SR 1) US 101
1989 105 267 Truckee (I-80) Kings Beach (SR 28)
1989 105 299 Arcata (US 101) SR 89 yes, Arcata to Redding yes, Arcata to Redding yes, Arcata to Redding
1989 105 299 SR 139 Alturas (US 395) yes yes
1989 105 330 SB-Riverside urban SR 18
1989 105 371 Aguanga (SR 79) Anza (SR 74)
1989 105 395 Cajon Pass (I-15) Oregon yes yes yes
1989 105 505 Vacaville (I-80) Dunnigan (I-5) yes yes yes
1989 105 580 San Rafael (US 101) Vernalis (I-5) yes yes yes
1989 105 680 San Jose (US 101) Cordelia (I-80) yes yes yes
1989 105 905 Mexico Mexico yes yes yes, I-5 to Mexico Except in San Diego urban

NHS in urban areas

Interstates are not listed here; neither are routes in small urban areas that are also listed above.

Map

California Interregional Road System.svg