State highways in California

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Template:Portal US Roads Image:California 49.svg Each state highway in the U.S. State of California is maintained by the California Department of Transportation (Caltrans) is assigned a Route (officially State Highway Route<ref>California Streets and Highways Code, Section 231</ref><ref>Caltrans, Other State Highway Routes</ref>) number in the Streets and Highways Code (Sections 300-635). Most of these are numbered in a statewide system, and are known as State Route X (abbreviated SR-X). United States Numbered Highways are labeled US X, and Interstate Highways are Interstate X, though Caltrans typically uses Route X for all classes.

The majority of legislative route numbers, those defined in the Streets and Highways Code, match the sign route numbers. On the other hand, some short routes are instead signed as parts of other routes - for instance, Route 112 and Route 260 are signed as part of the longer State Route 61, and Route 51 is part of Interstate 80 Business.

Image:CA123-CA13.jpg Business routes are not maintained by the state unless they are also assigned legislative route numbers. A few routes or sections of routes are considered unrelinquished - a new alignment has been built, or the legislative definition has changed to omit the section, but the state still maintains the roadway - and are officially Route XU. State Route 14U, an old alignment of State Route 14, is the only one signed as such. Some new alignments are considered supplemental<ref>Metadata for ST_HWY GIS data layer (PDF)</ref> and have a suffix of S; State Route 86S, a replacement for State Route 86, is the only signed one. Both types of suffixed routes are also considered spurs.<ref name="bridge log">January 1, 2006 California Log of Bridges on State Highways (calls State Route 14U and State Route 180S, among others, spurs)</ref> Current or former unsigned suffixed routes include State Route 156U, signed as State Route 156 Business through Hollister, and State Route 180S, the freeway replacement for State Route 180 in Fresno (now signed as SR 180).

1 History
2 List of routes
3 See also
4 References
5 External links

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History

Image:ACSC CSAA.png The first legislative routes were defined by the State Highway Bond Act in 1909. These, and later extensions to the system, were numbered sequentially. No signs were erected for these routes.

The United States Numbered Highways were assigned by the American Association of State Highway Officials (AASHO) in November 1926, but they were not posted in California until January 1928. These were assigned to some of the main legislative routes in California. Signs were posted by the Automobile Club of Southern California and California State Automobile Association, which had been active in signing national auto trails and local roads since the mid-1900s.

After a large expansion of the system in 1933, sign route numbers were assigned in 1934. These were assigned in a geographical system, completely independent of the legislative routes. Odd-numbered routes ran north-south and even-numbered routes ran east-west. The routes were split among southern California (ACSC) and central and northern California (CSAA) as follows:

0 or 1 modulo 4: central and northern California
2 or 3 modulo 4: southern California

For instance, State Route 1 and State Route 4 were in central and northern California, and State Route 2 and State Route 3 (since moved) were in southern California. A rough grid was used inside the two regions, with the largest numbers - all less than 200 (except for State Route 740, which was related to State Route 74) - in eastern California (north-south) and near the border between the two regions (east-west).

Template:Main The Interstate Highway System numbers were assigned by AASHO in late 1959. In 1963 and 1964, a total renumbering of the legislative routes was made, aligning them with the sign routes. Some changes were also made with the sign routes, mostly related to decommissionings of U.S. Routes in favor of Interstates.

Since the 1990s, many non-freeway routes, especially in urban areas, have been deleted and turned over to local control. Not all cities have been prepared to accept such routes from Caltrans simultaneously, so many have been decommissioned from the state system one fragment at a time. Template:-

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List of routes

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Routes 1-99

State Route 1	Often referred to as the Pacific Coast Highway or P.C.H. in Southern California, the Cabrillo Highway north of San Luis Obispo and the Shoreline Highway north of San Francisco.
State Route 2	Santa Monica Boulevard (former U.S. Route 66), Glendale Freeway and, in the San Gabriel Mountains, Angeles Crest Highway.
State Route 3	A scenic route from Yreka that passes through the Shasta-Trinity National Forest.
State Route 4	Also known, in Contra Costa County, as the John Muir Parkway and, further east, as the California Delta Highway.
State Route 7	Runs from the U.S.-Mexico border to Route 98, to be extended to Interstate 8.
State Route 9	Travels from near Santa Cruz to Los Gatos via Boulder Creek and Saratoga.
State Route 11	Connects State Route 905 to the future Mexican border crossing east of San Ysidro, California.
State Route 12	Connects Sebastopol, Santa Rosa, Napa, Fairfield, Suisun City, Rio Vista, Lodi, and San Andreas.
State Route 13	Ashby Avenue in Berkeley and the Warren Freeway south of Route 24, named after Earl Warren.
State Route 14	Also known as the Antelope Valley Freeway (southern portion) and the Midland Trail north of Route 58. An old alignment is State Route 14U.
State Route 15	Non-Interstate portion of Interstate 15, runs from I-15 and Interstate 8 to Interstate 5.
State Route 16	Runs from Clearlake east to Amador City.
State Route 17	Freeway and expressway that runs between San Jose and Santa Cruz.
State Route 18	Connects the eastern Antelope Valley in Llano to Victorville, Big Bear Lake, and San Bernardino.
State Route 19	Lakewood Boulevard / Rosemead Boluevard in Los Angeles County.
State Route 20	Connects Fort Bragg with Clearlake, Yuba City, Marysville, where it ends east of Nevada City.
State Route 22	East 7th Street in Long Beach from SR-1 to Interstate 405, and the Garden Grove Freeway from Interstate 405 in Seal Beach to SR-55 in Orange.
State Route 23	Called Grimes Canyon Road/Moorpark Freeway / Westlake Boulevard/Decker Canyon Road, it connects Fillmore to Malibu.
State Route 24	Connects Oakland (Interstates 580 and 980) and Walnut Creek (Interstate 680).
State Route 25	The primary north-south highway in San Benito County.
State Route 26	Travels from Stockton up the Sierra Nevada to Mokelumne Hill.
State Route 27	Topanga Canyon Boulevard, which runs from Route 1 at Topanga Canyon in Southern California to Route 118 via the west side of the San Fernando Valley.
State Route 28	Runs along the north shore of Lake Tahoe from Route 89 to the Nevada border.
State Route 29	The primary Wine Country highway in Napa County.
State Route 30	Former State Route that was transferred to Route 210 in 1998.
State Route 31	Former routing of Hamner Avenue in Norco, California next to Interstate 15.
State Route 32	Primary route from Chico to Lassen National Forest.
State Route 33	Runs from Ventura north across the western side of the Central Valley to near Tracy.
State Route 34	Runs from Oxnard, California to Camarillo, California; connects State Route 1 with U.S. Route 101 and then onto State Route 118.
State Route 35	Skyline Boulevard in San Mateo County, then known as Summit Road along the Santa Cruz-Santa Clara county border.
State Route 36	Travels west from Susanville through Red Bluff to near Eureka.
State Route 37	Connects Novato with Vallejo
State Route 38	An alternate route from the Inland Empire to Big Bear Lake.
State Route 39	Beach Boulevard in Orange County and Azusa Avenue north of Interstate 10.
State Route 41	Mostly scenic highway connecting Morro Bay to Fresno and Yosemite National Park
State Route 42	A deleted route that has since been replaced by I-105 and SR-90
State Route 43	A Central Valley highway running north to south through Selma and Wasco.
State Route 44	Travels from Redding east to near vicinity of Lassen Volcanic National Park and ends west of Susanville.
State Route 45	Parallels the Sacramento River in the Sacramento Valley, running through Colusa.
State Route 46	Begins at Cambria, crosses the Santa Lucia Mountains, passes through Paso Robles, California, intersects SR-41 and then passes through the western part of the southern San Joaquin Valley.. Originally part of US-466.
State Route 47	Connects San Pedro, The Vincent Thomas Bridge, Terminal Island, and Long Beach.
State Route 48	Deleted routing that would have been multiplexed with State Route 138 west of Palmdale.
State Route 49	The Gold Country Highway in the California Gold Country.
State Route 51	Hidden designation of the eastern half Business 80 in Sacramento, California.
State Route 52	The San Clemente Canyon Freeway in San Diego.
State Route 53	Main highway through Clearlake.
State Route 54	South Bay Freeway in San Diego.
State Route 55	The Costa Mesa Freeway in Orange County.
State Route 56	The Ted Williams Parkway in northern San Diego.
State Route 57	The Orange Freeway in Orange County.
State Route 58	formerly known as U.S. Highway 466, connecting Morro Bay and the southern San Joaquin Valley to historic U.S. Highway 66 in Barstow
State Route 59	A north-south Central Valley highway running through Merced.
State Route 60	East/west route from Los Angeles to Beaumont; named the Pomona Freeway in Los Angeles County and, further east, the Moreno Valley Freeway in the Inland Empire
State Route 61	Main highway through Alameda.
State Route 62	Main highway through Yucca Valley, 29 Palms, and other communities of the Morongo Basin in the southern Mojave Desert. Primary route to Joshua Tree National Park.
State Route 63	A north-south Central Valley highway from Tulare to Route 180 via the city of Visalia.
State Route 64	UNCONSTRUCTED. Route 64 is defined from Route 1 near Malibu Beach to Interstate 5 south of San Fernando.
State Route 65	Designed to be a major highway along the eastern edge of the Central Valley. Currently only the northernmost section near Marysville and the southernmost section near Bakerfield have been built.
State Route 66	Also known as Foothill Boulevard in the Inland Empire, and covering a portion of old U.S. Route 66.
State Route 67	The San Vincente Freeway, connecting El Cajon to Ramona.
State Route 68	Connects Monterey and Salinas.
State Route 69	Former routing of State Route 245.
State Route 70	Travels through Marysville and along the Feather River.
State Route 71	The Chino Valley Freeway in Southern California.
State Route 72	Partially signed route running along Whittier Blvd in Los Angeles ; part of El Camino Real.
State Route 73	The Corona del Mar Freeway and San Joaquin Hills Transportation Corridor' (a tollway) in Orange County.
State Route 74	The Palms to Pines Highway and Ortega Highway between Palm Desert and San Juan Capistrano
State Route 75	Starts at Interstate 5 in San Diego as the San Diego-Coronado Bridge, then becomes Orange Ave, Silver Strand Blvd, and Palm Avenue as it loops back to Interstate 5.
State Route 76	Westernmost 4 miles in Oceanside named Oceanside Police Officer Tony Zeppetella Memorial Freeway; becomes Mission Avenue afterwards.
State Route 77	A short road in Oakland.
State Route 78	Connects Oceanside to Route 10 near Blythe.
State Route 79	Connects Route 8 near Alpine to Interstate 15 in Temecula.
State Route 81	Unsigned and unbuilt north/south route in Riverside County and San Bernardino County.
State Route 82	El Camino Real on the San Francisco Peninsula and through downtown San Jose along a former routing of U.S. Route 101.
State Route 83	Runs from The Corona Expressway/71 to Route 66, mostly along "Euclid Avenue" through Chino, Ontario and Upland. A short portion in Upland (From North of Interstate 10 to the Expansion of State Route 210 runs on Mountain Ave.
State Route 84	A Bay Area loop consisting of various types of State Routes from Half Moon Bay to West Sacramento, with a break between Livermore and Antioch.
State Route 85	An alternative route bypassing U.S. Route 101 through the San Jose area from Mountain View to south San Jose.
State Route 86	Connects Route 111 in Heber northward along the western shore of the Salton Sea. It rejoins Route 111 in Coachella and ends soon afterward at 111's split in Indio. Was originally part of US-99.
State Route 86S	The "86S Expressway" through the eastern Coachella Valley between Coachella and the Riverside County/Imperial County line in Valerie Jean.
State Route 87	The Guadalupe Parkway in San Jose, California.
State Route 88	Runs through Stockton, Jackson and the El Dorado National Forest.
State Route 89	Connects Mount Shasta, Lassen Volcanic National Park, Lake Tahoe, and Markleeville.
State Route 90	Known as the Marina Freeway and Imperial Highway and the Richard M. Nixon Parkway in Los Angeles and Orange counties.
State Route 91	From Gardena, the Artesia Freeway and the Riverside Freeway to Interstate 215 (California) in Riverside.
State Route 92	The Arthur Younger Freeway in San Mateo County and the San Mateo-Hayward Bridge.
State Route 93	Unconstructed route in the Bay Area.
State Route 94	The Martin Luther King Freeway from Interstate 5 in Downtown San Diego to the end of the freeway portion past Route 125 in Spring Valley; it then becomes Campo Road to Interstate 8 in Manzanita.
State Route 96	Follows the Trinity and Klamath Rivers in Northern California.
State Route 98	A highway in Imperial County that parallels Interstate 8 between that freeway and the Mexican border.
State Route 99	The Golden State Route in the Central Valley, much of which was formerly US-99.

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Routes 100-199

State Route 100
State Route 102
State Route 103	Route in Terminal Island, cosigned with CA-47.
State Route 104	Route between Galt and Ione named Twin Cities Road.
State Route 106
State Route 107	Hawthorne Boulevard from the Route 1 (Pacific Coast Highway) to Redondo Beach Blvd at Lawndale, via Torrance.
State Route 108	Connects Modesto and Oakdale in Stanislaus County.
State Route 109	University Ave. in East Palo Alto between U.S. Route 101 and Route 84.
State Route 110	the Pasadena Freeway, now regarded as an extension of Interstate 110. Entire route, including I-110, was formerly signed as California State Route 11.
State Route 111	Main State Route through the Coachella Valley southward to the Imperial Valley and the international border with Mexico.
State Route 112
State Route 113	Connects Interstate 80 and Interstate 5 through Woodland and Davis in Yolo County.
State Route 114	Willow Road in East Palo Alto between U.S. Route 101 and Route 84.
State Route 115	An Imperial Valley highway from Holtville north to Calipatria.
State Route 116	An east-west Sonoma County highway running along the Russian River connecting Jenner and Sebastopol.
State Route 118	Also known, in parts, as The Ronald Reagan Freeway through Ventura and Los Angeles counties.
State Route 119	Connects Route 33 near Taft to Route 99 south of Bakersfield.
State Route 120	Connects the San Francisco Bay Area to Yosemite, and as Tioga Pass Road to the US Highway 395 at Lee Vining. Once proposed as an extension of US-6.
State Route 121	Wine Country highway through Sears Point and Napa.
State Route 122
State Route 123	San Pablo Avenue from Oakland north to Richmond.
State Route 124	An Amador County highway.
State Route 125	Runs along the east side of greater San Diego.
State Route 126	The Santa Paula Freeway in Santa Paula and, until 2002, Magic Mountain Parkway and San Fernando Road in Santa Clarita.
State Route 127	Travels from Baker north towards the vicinity of Death Valley National Park to the Nevada state line.
State Route 128
State Route 129	Connects Watsonville to U.S. Route 101 in San Benito County.
State Route 130	Mount Hamilton Road, connects San Jose to Lick Observatory and, as a paper route, to Patterson.
State Route 131	Main route from U.S. Route 101 to Tiburon. Locally known as "Tiburon Boulevard".
State Route 132	Runs east from Interstate 580 to Modesto.
State Route 133	Laguna Canyon Road and Laguna Beach Freeway in Orange County, and also the east leg of the Eastern Transportation Corridor.
State Route 134	The Ventura Freeway from U.S. Route 101 in North Hollywood to Interstate 210 in Pasadena.
State Route 135	A scenic alternative to U.S. Route 101 in Santa Barbara County near Santa Maria.
State Route 136	Runs along the northern shore of the Owens Lake.
State Route 137	An east-west Tulare County highway.
State Route 138	Pearblossom Highway and Avenue D in the Antelope Valley.
State Route 139	A north-south Lassen County highway connecting State Route 299 with Susanville.
State Route 140	The Central Yosemite Highway going west from Yosemite through Mariposa, Merced, and Gustine
State Route 141
State Route 142	Carbon Canyon Road from Chino Hills to Brea.
State Route 143
State Route 144	Sycamore Canyon Road in Santa Barbara.
State Route 145	Runs from Interstate 5 in the vicinity of Coalinga to Madera.
State Route 146	Provides entry to both the western and eastern parts of Pinnacles National Monument
State Route 147	Runs along the eastern shore of Lake Almanor in Plumas County.
State Route 148
State Route 149	Connects State Route 70 near Wicks Corner with State Route 99 south of Chico.
State Route 150	Connects Santa Paula to Ojai and U.S. Route 101 near the Ventura/Santa Barbara County Line.
State Route 151	Runs from Shasta Dam to Interstate 5 near Project City, California.
State Route 152	Connects Los Banos to Watsonville. Partially co-signed with U.S. Route 101 through Watsonville.
State Route 153
State Route 154	The San Marcos Pass, a scenic alternative to U.S. Route 101 from Santa Barbara to north of Solvang.
State Route 155
State Route 156	Runs from Castroville to State Route 152 near Hollister.
State Route 157
State Route 158
State Route 159
State Route 160	Mixed highway and freeway in Sacramento. It then runs south along the Sacramento River to the Antioch Bridge.
State Route 161
State Route 162	Runs roughly west-east from Longvale, in Mendocino County, where it intersects U.S. Route 101 to Oroville, in Butte County. It crosses State Route 70, State Route 99, State Route 45, Interstate 5, & U.S. Route 101.
State Route 163	The Cabrillo Freeway for the whole length in San Diego. Former U.S. Route 395.
State Route 164
State Route 165	A north-south road from Turlock through Los Banos
State Route 166	An east-west highway from near the Interstate 5--Route 99 interchange in Kern County to Maricopa and Santa Maria.
State Route 167
State Route 168	A highway that exists in three segments: from Fresno to the Sierra Nevada; from the Inyo National Forest to Bishop; and from Big Pine to Route 266 near the Nevada border.
State Route 169
State Route 170	Highland Avenue in Hollywood and the northern portion of the Hollywood Freeway.
State Route 171
State Route 172
State Route 173	Located along Lake Arrowhead, it is California's only unpaved State Route.
State Route 174
State Route 175
State Route 176
State Route 177	Road that connects State Route 62 with Interstate 10.
State Route 178	Highway that goes from Bakersfield, California along the base of the Sierras to Ridgecrest; another segment is in Death Valley National Park.
State Route 179
State Route 180	Connects Kings Canyon National Park with Mendota, passing through Fresno.
State Route 181
State Route 182
State Route 183	Runs only 10 miles from Salinas to Castroville
State Route 184
State Route 185
State Route 186	Connects Interstate 8 near Winterhaven, California with the Mexican border.
State Route 187	Venice Boulevard from Lincoln Boulevard Route 1 to Route 10 via Culver City.
State Route 188	A two-mile road near Tecate in San Diego County from State Route 94 to the Mexican border.
State Route 189	Alternative route to Lake Arrowhead via Strawberry Peak.
State Route 190	Travels east-west through Death Valley from Route 127 to U.S. Highway 395.
State Route 191
State Route 192	Parallelling Route 101 through the Santa Barbara coast.
State Route 193
State Route 194
State Route 195	Small route that connects Route 111 to Route 86 near Mecca.
State Route 196
State Route 197
State Route 198	Travels east-west from Sequoia National Park to Visalia, Hanford, and Coalinga.

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Routes 200-299

State Route 200
State Route 201	A route from State Route 99 in Kingsburg, CA to State Route 63 just south of Cutler, CA. Most of the route runs through Tulare County, CA. The western part of the route from State Route 99 to about a quarter of a mile east of Kingsburg, CA is in Fresno County, CA.
State Route 202
State Route 203	The Mammoth Scenic Loop runs through Mammoth Lakes, California and returns to U.S. Highway 395.
State Route 204
State Route 206
State Route 207	A spur route from Route 4 into Bear Valley Ski Resort in Alpine County.
State Route 208
State Route 209	Formerly from the Cabrillo National Monument to the junctions of Interstates 5 and 8 in San Diego.
State Route 210	The portion of the Foothill Freeway in San Bernardino County and eastern Los Angeles County that is currently being upgraded to an InterState Route. It was originally signed as California State Route 30, and may still have such signage in some places.
State Route 211
State Route 212
State Route 213	Western Avenue from the Palos Verdes Peninsula to Carson Avenue in Torrance.
State Route 214
State Route 216	A route from Visalia to Woodlake in Tulare County. An alternate route between San Luis Obispo and Arroyo Grande.
State Route 217	A freeway, slightly more than 2 miles long, connecting the University of California, Santa Barbara with U.S. Route 101.
State Route 218
State Route 219
State Route 220	Connects Route 84 to Route 160 across Ryer Island in Solano County.
State Route 221
State Route 222
State Route 223	Known as Bear Mountain Blvd., connects Interstate 5 with CA-58.
State Route 224	A former state route linking Carpinteria State Beach and U.S. Route 101 in Carpinteria
State Route 225	State Route 225 is a loop route through the Santa Barbara beaches, ending in downtown Santa Barbara near SBCC
State Route 226
State Route 227	An alternate route between San Luis Obispo and Arroyo Grande.
State Route 228
State Route 229	A short rural road connecting SR-58 and SR-41 in San Luis Obispo County.
State Route 230
State Route 231
State Route 232	Vineyard Avenue in Oxnard. It connects (Route 1 (Oxnard Boulevard), U.S. Route 101, and Route 118.
State Route 233
State Route 234
State Route 235
State Route 236	Loop from Route 9 to Big Basin Redwoods State Park.
State Route 237	Connects El Camino Real in Mountain View to Interstate 680 in Milpitas. It is a major corridor through Silicon Valley.
State Route 238	Mission Boulevard in Alameda County, a portion of this route is designated as Interstate 238.
State Route 239
State Route 240
State Route 241	the Foothill Corridor and Eastern Transportation Corridor (tollways) in Orange County connecting Rotue 91 west of Corona and through the Santa Ana Canyon to the San Diego Freeway in Irvine.
State Route 242	Connects Interstate 680 north of Pleasant Hill to State Route 4 in Concord
State Route 243	Scenic mountain route from Banning to Idyllwild.
State Route 244
State Route 245
State Route 246	Cuts through the Santa Barbara wine country and the Danish town of Solvang.
State Route 247	Old Woman Springs Road between Yucca Valley and Barstow.
State Route 248
State Route 249
State Route 250
State Route 251
State Route 252	DELETED. Planned freeway from Interstate 805 (California) at 43rd St to Interstate 5 at Interstate 15 in San Diego.
State Route 253
State Route 254	The Avenue of the Giants
State Route 255
State Route 256
State Route 257	UNCONSTRUCTED. Planned freeway from Route 34 in the vicinity of Oxnard to U.S. Route 101 in Ventura.
State Route 258
State Route 259	Connects Interstate 215 (California) and Route 30 in San Bernardino.
State Route 260
State Route 261	The west leg of the Eastern Transportation Corridor (tollways) in Orange County.
State Route 262
State Route 263	Originally part of US-99.
State Route 265
State Route 266	A short highway in Mono County that both begins and ends at the Nevada state line.
State Route 267
State Route 268
State Route 269	Runs from SR-33 to SR-145 through the San Joaquin Valley.
State Route 270	Spur route to the ghost town of Bodie, a California state park.
State Route 271
State Route 273	Originally part of US-99.
State Route 274	DELETED. Balboa Avenue in San Diego from Interstate 5 (California) to Interstate 15.
State Route 275	The Tower Bridge and the Capitol Mall (to 9th Street) in Sacramento.
State Route 276
State Route 281
State Route 282	The 3rd Street & 4th Street couplet from Route 75 to the Naval Air Station North Island in Coronado.
State Route 283	The Eel River Bridge. California's shortest state highway.
State Route 284
State Route 285
State Route 299	Northern California route traveling west from Arcata to Redding and Alturas. Originally US-299.

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Routes 330-905

State Route 330	Popular scenic route starting from Route 30 in San Bernardino to the mountain resorts of Lake Arrowhead and Big Bear Lake.
State Route 371	Scenic highway from Route 74 in Anza to Route 79 in Warner Springs.
State Route 440
State Route 480	The former Embarcadero Freeway in San Francisco.
State Route 740
State Route 905	Temporary number for a highway from Interstate 5 to the Otay Mesa Mexican Border Crossing in San Diego. Once the highway has been fully upgraded to an Interstate, it will become Interstate 905.

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Interstates

Interstate 5	Goes north from the Mexican border at San Ysidro through San Diego, Los Angeles, and the Central Valley to Sacramento, Redding, and the Oregon border.
Interstate 8	Goes east from San Diego through El Centro into Arizona.
Interstate 10	Goes east through Los Angeles and San Bernadino to Blythe and Arizona.
Interstate 15	Interstate 15 begins in San Diego, then heads northeast towards Las Vegas, passing through Victorville and Barstow.
Interstate 40	Runs east of Barstow to Needles and Kingman, Arizona.
Interstate 80	Interstate 80 begins in San Francisco, then heads east through the Sierra Nevada Mountains into Nevada.
Interstate 238	Short Interstate that connects Interstate 580 to Interstate 880 in Hayward.

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Auxiliary Interstates

Interstate 5

Interstate 105	East/west route which connects LAX, to the southeastern Los Angeles metro area and Interstate 605.
Interstate 205	Connects Interstate 5 with Interstate 580.
Interstate 305	Unsigned Interstate known as Business Loop Interstate 80 and U.S. Highway 50.
Interstate 405	North/south route that bypasses downtown Los Angeles by following the shoreline west of Interstate 5.
Interstate 505	Connects Interstate 5 north of Sacramento to Interstate 80.
Interstate 605	Major north-south route in the eastern portion of the Los Angeles metro area.
Interstate 805	Inland north/south route that bypasses the San Diego metro area east of Interstate 5.

Interstate 10

Interstate 110	Runs from downtown Los Angeles south to San Pedro.
Interstate 210	Northern bypass of the Los Angeles metro area on Interstate 10, will be fully completed in 2007.
Interstate 710	Connects Valley Boulevard in Alhambra to Long Beach. Planned to extend to Pasadena, but faces local opposition.

Interstate 15

Interstate 215

North/south loop route from Interstate 15 into the cities of San Bernardino and Riverside.

Interstate 80

Interstate 280	A north/south route in the San Francisco Bay Area that runs to the west of U.S. Route 101 and connects San Francisco to San Jose.
Interstate 380	A short route from Interstate 280 to U.S. Route 101 leading into San Francisco International Airport.
Interstate 580	Connects Interstate 5 south of Tracy to U.S. Route 101 in San Rafael.
Interstate 680	Runs from San Jose to Interstate 80 in Benicia.
Interstate 780	Connects Interstate 680 to Interstate 80 in Benicia.
Interstate 880	A route from San Jose, California heading up the east Bay Area to Oakland.
Interstate 980	Short route that connects Interstate 880 to Interstate 580 and California State Route 24 in Oakland.

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Business Routes

This list is incomplete; you can help by expanding it.

Interstate 5

Business 5

In Weed, California, Weed Boulevard carried partway by Route 265.

Interstate 80

Business 80

A unique Business Loop Interstate Highway off of Interstate 80 in Sacramento, California. Bus-80 is a state maintained freeway, and in fact formerly carried Interstate 80.

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U.S. Routes

U.S. Route 6	Begins in Bishop and goes into Nevada.
U.S. Route 50	Begins in Sacramento, then goes by Lake Tahoe into Nevada.
U.S. Route 95	Goes from the Arizona state line near Needles to the Nevada state line near Laughlin.
U.S. Route 97	Runs north from Weed into Oregon.
U.S. Route 101	Runs along the California coast from Los Angeles through San Francisco into Oregon.
U.S. Route 199	Connects U.S. Route 101 in California to Interstate 5 in Oregon.
U.S. Route 395	Begins near Hesperia, goes through the Eastern Sierras, and emerges in Northern California.