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U.S. Route 101 in California

From Wikipedia, the free encyclopedia

U.S. Route 101 marker

U.S. Route 101
Map of California with US 101 highlighted in red
Route information
Defined by Streets and Highways Code § 401
Maintained by Caltrans
Length 808.111 mi[3] (1,300.529 km)
Portions of US 101 have been relinquished to or are otherwise maintained by local or other governments, and are not included in the length.
Existed November 11, 1926 (1926-11-11)[1][2] – present
Major junctions
South end I-5 / I-10 / SR 60 in Los Angeles
 
North end US 101 at Oregon state line
Location
Counties Los Angeles, Ventura, Santa Barbara, San Luis Obispo, Monterey, San Benito, Santa Clara, San Mateo, San Francisco, Marin, Sonoma, Mendocino, Humboldt, Del Norte
Highway system
SR 99SR 103

U.S. Route 101 (US 101) in the state of California is one of the last remaining and longest U.S. Routes still active in the state, and the longest highway of any kind in California.[4] US 101 was also one of the original national routes established in 1926. Significant portions of US 101 between the Los Angeles area and the San Francisco Bay Area follow El Camino Real, the historic road connecting the former Alta California's 21 missions.

Although the highway has been superseded in overall importance for transportation through the state by Interstate 5 (I-5), US 101 continues to be the major coastal north–south route that links the Greater Los Angeles Area, the Central Coast, the San Francisco Bay Area, and the North Coast (Redwood Empire). Generally referred to as "101" by residents of Northern California, in Southern California it is often called "The 101" (pronounced "the one oh one").[5] The highway has portions designated as the Santa Ana Freeway, the Hollywood Freeway, the Ventura Freeway, South Valley Freeway, and Bayshore Freeway. The Redwood Highway, the 350-mile-long (560 km) northernmost segment of the highway, begins at the Golden Gate and passes through the world's tallest and only extensive preserves of virgin, old-growth coast redwood trees.

Route description

US 101 is part of the California Freeway and Expressway System,[6] and is part of the National Highway System,[7] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[8]

Los Angeles to Ventura

US 101 northbound as it enters downtown Los Angeles
US 101 northbound as it enters downtown Los Angeles

The south terminus of US 101 is in Los Angeles, about one mile (1.6 km) east of downtown Los Angeles at the East Los Angeles Interchange, also known as the "Commuters' Complex". This southernmost portion is named the Santa Ana Freeway, inheriting that title as the northerly extension of the roadway now known as I-5.

After merging with westbound traffic from the San Bernardino Freeway (I-10), US 101 then proceeds northwest via the Downtown Slot under the northern edge of Los Angeles' Civic Center to State Route 110 (SR 110) at the Four Level Interchange. From here, US 101 becomes the Hollywood Freeway. It then heads to Hollywood and up through the Cahuenga Pass before reaching the San Fernando Valley.

View northward from the Cahuenga Pass in 1972
View northward from the Cahuenga Pass in 1972

US 101 then intersects with SR 134 and SR 170 at the interchange known as the Hollywood Split. Here, the alignment of US 101 shifts to the alignment of SR 134 (i.e. heading northbound, the road's alignment turns left, or westbound) and thereafter is referred to as the Ventura Freeway until it reaches Ventura. Though confusing, the "Hollywood Freeway" name continues northward from this interchange on SR 170, and the "Ventura Freeway" name continues eastward to SR 134.

From the Hollywood Split, US 101 is an east–west highway (until it reaches Gaviota State Park in Santa Barbara County where it shifts back to a north–south alignment). It meets with I-405 in Sherman Oaks, an interchange which holds claim to the most traveled intersection in the nation.[citation needed] The east–west geographical alignment of the Ventura Freeway and the north–south designation which appears on the freeway signs can be confusing to visitors; the same freeway entrance can often be signed as "101 North" and "101 West"; this is most common in the San Fernando Valley where the local E/W signing does not match the Caltrans' proper statewide N/S designation.

After the Conejo Grade, which is a 7% grade incline, the freeway enters the Oxnard Plain.

Upon reaching Ventura, there is an interchange with SR 126.

Central Coast

US 101 northbound approaching Gaviota Tunnel through the Santa Ynez Mountains
US 101 northbound approaching Gaviota Tunnel through the Santa Ynez Mountains

North of Santa Barbara, US 101 switches intermittently between freeway and expressway status (i.e. there is occasional cross-traffic), but there are no traffic signals until San Francisco. The last traffic signals along this stretch of the route were removed in 1991 when the section through downtown Santa Barbara was constructed to freeway standards after years of disagreement over the impact that the original elevated design would have on the community.[9]

From Ventura and through Santa Barbara, US 101 closely follows the Pacific coastline (generally no more than one to two miles [1.6 to 3.2 km] from the shore) until Gaviota State Park, about 23 miles (37 km) west of Goleta. At Gaviota State Park, the highway shifts back from an east–west highway to a north–south alignment. About one mile (1.6 km) north of this point, US 101 passes through the Gaviota Tunnel.

A few miles north of the Gaviota Tunnel, SR 1 splits from US 101 and heads northwest, running along the Pacific coastline parallel and to the west of US 101. US 101 passes through Buellton, Los Alamos, Orcutt, Santa Maria, and Nipomo. South of Santa Maria, US 101 widens from a four-lane highway to a six-lane freeway. SR 166 joins US 101 for about 3 miles (4.8 km) before splitting just north of the city limits, while US 101 continues as a four-lane freeway before reverting to expressway status north of Nipomo.

Farther north, SR 1 rejoins US 101 between Pismo Beach and San Luis Obispo. Then US 101 takes an inland route through the Salinas Valley, while Highway 1 heads northwest, running along the Pacific coastline in California, parallel and to the west of US 101.

Traffic descending the Cuesta Grade north of San Luis Obispo
Traffic descending the Cuesta Grade north of San Luis Obispo

A steep segment (7% grade) between San Luis Obispo and Atascadero is known as the Cuesta Grade. North of Atascadero, the highway joins SR 46 for about three miles (4.8 km) through Paso Robles.

From Paso Robles to Salinas, US 101 is an expressway known as the Salinas River Valley Highway, since the Salinas River Valley extends from Santa Margarita to the SR 156 junction in Prunedale. US 101 resumes freeway status between San Miguel and King City, passing through the smaller towns of Camp Roberts, Bradley, and San Ardo, as well as the San Ardo Oil Field about five miles (8.0 km) south of San Ardo. Near this point, the wide agricultural bottomlands of the Salinas Valley begins. North of King City, US 101 once again switches intermittently between freeway and expressway status, passing through Greenfield, Soledad, Gonzales, and Chualar before reaching Salinas. Shortly after leaving Salinas, US 101 joins SR 156 in Prunedale for about eight miles (13 km). After crossing the San Benito County line, SR 156 splits from US 101 near San Juan Bautista while US 101 continues northward mostly as a four-lane highway until it reaches Gilroy.

US 101 sign in San Francisco
US 101 sign in San Francisco

San Francisco Bay Area

US 101 in San Francisco between Sacramento and Clay Streets; a Muni ETI Skoda bus can be seen in the background.
US 101 in San Francisco between Sacramento and Clay Streets; a Muni ETI Skoda bus can be seen in the background.

US 101 crosses the Pajaro River into Santa Clara County as a four-lane highway, with an interchange at SR 25 a few miles later. Upon reaching Gilroy, it becomes the South Valley Freeway (as in South Santa Clara Valley), and at the same time, it expands to three lanes in each direction. It then enters Silicon Valley when reaching Morgan Hill, and shortly afterwards expands to four lanes in each direction, with an HOV lane in the middle, before reaching San Jose. From San Jose to San Francisco, US 101 is known as the Bayshore Freeway as it passes through Palo Alto and the other major communities along the San Francisco Peninsula.

The Golden Gate Bridge, which carries US 101 and SR 1 between San Francisco and Marin County
The Golden Gate Bridge, which carries US 101 and SR 1 between San Francisco and Marin County

US 101 is called the James Lick Freeway, named for James Lick, a philanthropist, from the San Francisco county/city line, through the interchange with I-280 at the Alemany Maze, until the junction with the San Francisco Skyway (I-80) and the Central Freeway near the city's Civic Center. US 101 continues in a northwestern direction on the Central Freeway, and then leaves the freeway, on Mission Street (northbound) and South Van Ness Avenue (southbound), to run north on Van Ness Avenue. At the intersection of Van Ness Avenue and Lombard Street, US 101 heads west on Lombard Street, and then on Richardson Avenue, entering The Presidio, where it becomes a divided highway again (the Presidio Parkway). It is then joined by Route 1 before approaching and crossing the Golden Gate Bridge.

From San Francisco north the highway is heavily traveled by commuters through to Windsor, just north of Santa Rosa. North of the Golden Gate Bridge, US 101 enters Marin County and is known as the Redwood Highway. After crossing the bridge, US 101 climbs the Waldo Grade and passes through the Robin Williams Tunnel, the only one of its kind in 300 miles (480 km) (the other being the Gaviota Tunnel in Santa Barbara County). Upon exiting the tunnel, it passes above the hillside town of Sausalito and descends to Richardson Bay, where SR 1 splits from the freeway and heads to the coast. US 101 then passes through Mill Valley, Corte Madera, Larkspur, San Rafael and Novato, before entering Sonoma County. The section between Novato in Marin County and Petaluma in Sonoma County changes from its original six or eight lanes through Marin to four lanes, creating a bottleneck, and is thus called the "Novato Narrows" by locals.[10] The Narrows continue up to North of Petaluma. The entire area between Novato and Petaluma is also the voter approved Novato–Petaluma Community Separator, which forbids most development.[11]

Upon entering Sonoma County, it continues as a four-lane highway until Petaluma, where it resumes freeway status and eventually a six-lane freeway between Petaluma and Windsor, passing through Cotati, Rohnert Park, and Santa Rosa. Upon reaching Windsor, the freeway returns to two lanes in each direction, passing through Healdsburg. It then proceeds up the Alexander Valley with the Russian River. SR 128 joins US 101 in the town of Geyserville before splitting just north of Cloverdale. US 101 then heads up a steep hill just before leaving Sonoma County and entering Mendocino County.

North Coast

US 101 follows the Russian River past Frog Woman Rock in southern Mendocino County
US 101 follows the Russian River past Frog Woman Rock in southern Mendocino County
Historic US 101 roadside attraction in Ukiah, now bypassed by the freeway
Historic US 101 roadside attraction in Ukiah, now bypassed by the freeway

US 101 crosses into the Mendocino County line as a freeway for one mile (1.6 km), but then narrows to an expressway through the Russian River canyon and eventually a two-lane road south of Hopland, the first time since leaving San Francisco. Just before reaching Ukiah, US 101 becomes a four-lane freeway. In the community of Calpella, SR 20 merges with US 101 for the next 15.5 miles (24.9 km) to Willits. The freeway portion ends as the combined US 101 and SR 20 ascend the 1,953-foot (595 m) Ridgewood Summit, the highest elevation along the route's 808-mile-long (1,300 km) trek through California. As 101 resumes freeway status just south of Willits, SR 20 splits from 101 shortly before 101 suddenly reverts to a 2-lane undivided freeway and eventually a highway north of Willits.

US 101 then widens to a four-lane expressway until the intersection with the western portion of SR 162, where it reverts to a two-lane road. North of Laytonville, US 101 ascends Rattlesnake summit (1,796 feet or 547 metres) before a descent to follow the South Fork Eel River and Eel River all the way to Fortuna near the mouth of the river. About 12 miles (19 km) northwest of Laytonville, US 101 becomes an undivided freeway near the community of Cummings. SR 271 is the old portion of US 101 through this area. At Leggett, US 101 meets SR 1 for the last time, and from this point until Piercy, US 101 runs along a section of highway with frequent landslides. Cal Trans bypassed the most difficult section in 2009 with unique construction of two bridges known collectively as the Confusion Hill Bridges. This project, funded by an emergency act from the State Legislature, moved the highway across the Eel River away from the troubled spots to prevent disruption in commerce and travel from infrequent, but costly, winter closures on the main transportation route to the far North Coast. North of Piercy, the freeway portion again ends and the road narrows down to two lanes, before another stretch of divided highway.

Arriving in Humboldt County, another narrow two lane portion of US 101 bisects Richardson Grove State Park. Just after the park boundary, the highway switches to a short undivided freeway and then eventually a divided freeway just before reaching Garberville. North of Garberville, US 101 reverts to an undivided freeway, which continuing north by northwest, passes through the 53,000-acre (210 km2) Humboldt Redwoods State Park, California's third largest State Park and the site of the largest remaining Redwood old growth forest in the world. A preserved portion of the original, bypassed highway route, known as the Avenue of the Giants for the huge, centuries-old redwood trees, parallels the highway for over 30 miles (48 km) in southern Humboldt County. US 101 again switches to another stretch of divided freeway near the town Pepperwood before reverting to a short, 2-mile (3 km) expressway just north of Stafford. A short freeway then runs through Rio Dell before another short, 3-mile (5 km) expressway.

Shortly before reaching the western terminus of SR 36, US 101 becomes a freeway again between Fortuna and Eureka. North of Humboldt Hill, the road enters the City of Eureka (a potential new freeway cutting through or bypass of the city was successfully blocked repeatedly). As the route traverses Eureka, the southern portion is known as "Broadway" and then as it bears east along Humboldt Bay, the Highway is aligned on a one-way couplet (4th and 5th streets). Five miles (8.0 km) later the highway leaves Eureka's northern city limit and continues north. The expressway style section between Eureka and Arcata, which is also a safety corridor, is named the "Michael J. Burns Freeway," in honor of the State Senator who was a proponent of California's Highways. The Highway becomes an unobstructed Freeway south of the center of Arcata. Proceeding north it passes the junction for SR 299 (also the western terminus for that route), in the Valley West (northernmost) part of the college town.

Parking adjacent to US 101 along the sandy bar between Freshwater Lagoon and the Pacific Ocean
Parking adjacent to US 101 along the sandy bar between Freshwater Lagoon and the Pacific Ocean

The highway continues north as it skirts westerly around McKinleyville on a high bluff north of the Mad River. As the highway reaches Clam Beach (a county park), motorists get their first magnificent full view of the Pacific Ocean north of the Golden Gate. North of Trinidad, the highway narrows to one lane in each direction after crossing Big Lagoon to pass inland of Stone Lagoon and follow the coastal bar between Freshwater Lagoon and the Pacific Ocean south of Orick. After a 14-mile (23 km) freeway section through Redwood National and State Parks running inland east of the Prairie Creek Redwoods State Park boundary, the highway again narrows to one lane in each direction at the Klamath River. The original placement of the highway near giant Coast Redwoods led to increased awareness of the destruction of the redwoods after decades of extensive logging, which ultimately led to the establishment of Redwood National Park in 1968. The original highway segment through Prairie Creek Redwoods State Park is now a scenic alternate similar to Avenue of the Giants, named Newton B. Drury Scenic Parkway in honor of the fourth director of the National Park Service and executive director of the Save-the-Redwoods League

Intersection between US 101 and US 199
Intersection between US 101 and US 199

North of the town of Klamath just inside Del Norte County, the highway closely follows the Pacific coast again. In Crescent City, US 101 once again separates into a one-way couplet (L and M Streets) for nine blocks. As it leaves Crescent City, US 101 becomes a divided freeway for the last time in California (built slightly to the west of the original two-lane alignment, now called Parkway Drive). As the 3-mile divided freeway portion ends, US 101 intersects the southern terminus of US 199, which heads northeast as the Redwood Highway, passing through the Collier Tunnel and terminating in Grants Pass, Oregon. US 101 (no longer called the "Redwood Highway" at this point) is reduced to two lanes and continues north along the California coast until it reaches the Oregon border.

History

Juan Bautista de Anza National Historic Trail

The US 101 Highway is part of the auto tour route of the Juan Bautista de Anza National Historic Trail, a National Park Service unit in the United States National Historic Trail and National Millennium Trail programs.[12] In 2005, Caltrans began posting signs on roads that overlap with the historic 1776 Juan Bautista de Anza trail route, so that California drivers can now follow the trail.

Historic route: Los Angeles to San Diego

Early narrow concrete pavement survives on some former alignments like this stage route near Mission San Miguel Arcángel was designated US 101 until bypassed in 1938.
Early narrow concrete pavement survives on some former alignments like this stage route near Mission San Miguel Arcángel was designated US 101 until bypassed in 1938.

Instead of terminating in Los Angeles, US 101 once continued all the way south through San Diego to the United States–Mexico border in San Ysidro. However, this part was decommissioned on July 1, 1964, in favor of I-5. The only remnant of the old route on US 101's current alignment is a mileage sign at the Santa BarbaraVentura county line, which lists the distance to San Diego, even though US 101 ends in Los Angeles.

Oceanside–Carlsbad freeway bypass

By the early 1950s, traffic had become very heavy on US 101 through Oceanside and Carlsbad. The US 101 freeway bypass (Oceanside-Carlsbad freeway bypass) was built in 1953 and completed in 1955 by the California Department of Public Works (now Caltrans) and brought up by the San Diego Highway Development Association on a US 80/US 101 discussion on how to resolve the huge traffic loads on US 101 in Oceanside. Today it is part of I-5 and Palomar Airport Road. It follows I-5 from Coast Highway (former Hill Street exit) in Oceanside to Palomar Airport Road in Carlsbad. From there the US 101 bypass went onto Palomar Airport Road to merge with US 101 Bus. on Carlsbad Boulevard. As it approached the Coast Highway/SR 76 exit on southbound I-5 in Oceanside, US 101 Bus. split off. US 101 Bus. followed the original US 101 through downtown Oceanside and Carlsbad as former Hill Street/Carlsbad Boulevard (CR S-21) while the US 101 freeway followed modern I-5 and Palomar Airport Road. The south end of the freeway bypass is Carlsbad Boulevard and Palomar Airport Road and the north end is I-5 and the Coast Highway/SR 76 exit. The south end was modified after US 101 was decommissioned between the East Los Angeles Interchange in Los Angeles and the Mexican border in San Ysidro. This freeway construction by the California Department of Public Works put US 101 on an all new highway route alignment to relieve Oceanside and Carlsbad of their very heavy bumper-to-bumper burdensome traffic problem. Also before the bypass in the 1950s, US 101 followed North Coast Highway (formerly Hill Street) from San Luis Rey Mission Expressway (SR 76 and north end of the Oceanside–Carlsbad freeway bypass) to Harbor Drive. From there it followed Harbor Drive to Vandergrift Boulevard, San Rafael Drive, and the freeway onramp for I-5 north near the Camp Pendleton north entrance guardhouse gate. It merges with the I-5 northbound onramp to shoot onto the southbound lanes of I-5 to follow the freeway lanes all the way to Las Pulgas Road in Camp Pendleton.

Historic Route In Orange County

An old orphaned alignment of US 101, that ran through the cities of Mission Viejo, Laguna Niguel, San Juan Capistrano, Dana Point, and San Clemente, was located in south Orange County. The old roadway, from a dead end just west of I-5 and east of the railroad tracks in Mission Viejo to Cristianitos Road in San Clemente, followed Camino Capistrano, Doheny Park Road, Coast Highway and El Camino Real. It had interchanges with I-5 and California State Route 1. It was replaced by the San Diego freeway (which US 101 became part of it in 1958) and finally replaced by I-5 in 1968.

El Camino Real: Los Angeles to San Francisco

Distinctive route markers with symbolic mission bell and shepherd's crook are seen between Los Angeles and San Jose
Distinctive route markers with symbolic mission bell and shepherd's crook are seen between Los Angeles and San Jose

Significant portions of US 101 from its southern terminus to the San Francisco Bay Area is designated as the Royal Road or El Camino Real. The route roughly follows the historic trail that connected the former Alta California's 21 missions.

Before the Golden Gate Bridge was completed in 1937, there was regular vehicle ferry service across the Golden Gate strait, running from the Hyde Street Pier to  Sausalito. Under the California Streets and Highways Code § 401, the Golden Gate Bridge is legally not part of US 101. The portion of US 101 starting from Los Angeles ends at "the approach to the Golden Gate Bridge" and then resumes at "a point in Marin County opposite San Francisco" to the Oregon state line. The bridge itself is maintained by the Golden Gate Bridge, Highway and Transportation District instead of Caltrans.

From the 1940s to 1991, various segments of US 101 between Los Angeles and San Francisco were upgraded to either a freeway or expressway. In the Los Angeles area, the first segment of the Hollywood Freeway through the Cahuenga Pass opened in 1940, while the segment from the San Fernando Valley to Downtown Los Angeles opened in 1954.[13] The Ventura Freeway then opened in 1960.[14] The segment of the original two-lane alignment between Emma Wood State Beach north to the Mobil Pier Undercrossing near Sea Cliff, which followed the historic Rincon Sea Level Road, was the re-signed as part of SR 1.

In the San Francisco Bay Area, US 101 was originally divided. US 101W followed the same general right-of-way of today's US 101 through the region, primarily along what was originally signed as Bayshore Boulevard. US 101E then generally followed the right-of-way taken by today's I-880 from San Jose to Oakland, then across the Carquinez Bridge to follow what is now SR 37, joining US 101W. The US 101E designation was removed by the 1940s and became SR 17 (later designated as I-880 and the westernmost section I-580), running from San Jose to Oakland and then across the Richmond–San Rafael Bridge. Meanwhile, Bayshore Boulevard was later redesignated as the US 101A bypass and then eventually upgraded to what is now the Bayshore Freeway. The first stretch that was completed between Redwood City and South San Francisco was the Bay Area's first freeway when it opened in 1947. After the entire Bayshore Freeway was completed in the early 1960s, the old alignment along the peninsula was renumbered and renamed as SR 82/El Camino Real.

Various other freeway or expressway bypasses along the California Central Coast were also built. In 1991, the last traffic signal along US 101 between Los Angeles and San Francisco was taken down in Santa Barbara.[15] The primary control city that is listed on freeway signs along northbound US 101 through the Central Coast region remains San Francisco. Although San Jose surpassed San Francisco population decades after the highway was built, there has been no push to change all the signs.

As the result of freeway revolts in San Francisco in the 1950s, a direct freeway connection through the city to the Golden Gate Bridge has never been built. The Central Freeway was completed to extend from the Bayshore Freeway to Turk Street in 1959,[16][17] before the San Francisco Board of Supervisors voted to remove the remainder of the Central Freeway and most other proposed freeways from the city's highway plan.[18] For decades, southbound traffic on US 101 flowed on the one-way Turk Street from Van Ness Avenue to the Central Freeway, while northbound traffic used the parallel Golden Gate Avenue. After the 1989 Loma Prieta earthquake damaged the structure, the segment of the Central Freeway north of Market Street was replaced with the surface-level Octavia Boulevard; traffic on US 101 was then eventually re-routed to exit south of that at Mission Street/South Van Ness Avenue. With no direct freeway along US 101 through the City of San Francisco, the old US 101E/I-880/I-580 route remains as a faster bypass through the Bay Area.

In 2003, the segment of US 101 between Morgan Hill and San Jose, also known as the Sig Sanchez Freeway, expanded to eight lanes between Cochrane Road and SR 85 exits.[19] Originally, the ten-mile segment was only four lanes.[20] The improved segment was to alleviate the consistent congestion that had expanded as far south as Masten Avenue coming from Gilroy, and as far north as Bernal Road coming from San Jose.[21][22] Traffic now typically only runs slow between the Bailey Avenue and Dunne Avenue exits.

The interchange at the beginning of I-280 and I-680 was constructed years before its completion. The two bridges, with no on ramps or off ramps stood over US 101 as a 110-foot-tall (34 m) monument to inefficiency for years in the 1970s. It became the butt of many local jokes. The highlight prank occurred in January 1976, when a 1960 Chevrolet Impala was placed on the highest bridge overnight, where it obviously would be impossible to drive. The following day, San Jose City Councilman Joe Colla was photographed standing next to the car, a photo which was circulated across many newspapers.[23] It has been suggested this stunt nudged the wheels of progress to find the funds to complete the freeway. In 2010, the interchange was named the Joe Colla Interchange.[24]

Redwood Highway: Marin County to Del Norte County

Redwood Highway
Nearest city Klamath, California
Built 1900–1949
NRHP reference # 79000253[25]
Added to NRHP December 17, 1979

An abandoned segment of the Redwood Highway, US 101, located in the Redwood National and State Parks near Klamath was added to the National Register of Historic Places in 1979.[25]

Freeway segments along the Redwood Highway portion of US 101 are not as prevalent as along the Los Angeles-San Francisco route. A notable segment of the old US 101 alignment is SR 254, also known as the Avenue of the Giants, in Humboldt Redwoods State Park. The freeway bypassing this scenic route, surrounded by towering Coast Redwoods, was completed in 1960.[26] Several bridges along the segment of highway running along the Eel River were destroyed during the Christmas flood of 1964.

Construction on a freeway segment bypassing Willits began in 2013.[27] The bypass around Willits remained controversial because the intended route goes through protected wetlands. Construction was halted by US Army Corps of Engineers in June 2014 and work restarted the following month after Caltrans committed to extensive mitigation of the project.[28][29] The 5.9 mi (9.5 km) bypass around Willits opened to traffic in November 2016.[30] The bypass included a 1.1 mi (1.8 km) viaduct going over a flood plain.[31] The freeway segment cost $459 million to complete; 50% more than what Caltrans first reported when it opened.[32] The city of Eureka has long resisted a freeway through it.[citation needed]

Major intersections

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see the list of postmile definitions).[3] Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.

CountyLocationPostmile
[3][33][34]
Exit
[35]
DestinationsNotes
Los Angeles
LA S0.00-38.19
Los Angeles I-5 south (Santa Ana Freeway south) – Santa AnaSouthbound exit and northbound entrance; southern terminus of US 101
1Euclid AvenueSouthbound exit and northbound entrance
SR 60 east (Pomona Freeway) / Soto Street – PomonaSouthbound exit and northbound entrance; SR 60 west exit 1C
S0.001ASeventh StreetSouthbound exit and northbound entrance
Whittier BoulevardNorthbound entrance only
S0.621AFourth StreetSigned as exit 1B southbound; no northbound entrance
S0.911BFirst StreetSigned as exit 1C southbound; no southbound entrance
1CCesar Chavez AvenueNorthbound exit only
S1.33
0.00
1D To I-10 east / San Bernardino Freeway east (SR 10 east) – San BernardinoNo southbound entrance; left exit southbound; former western terminus of US 60 / US 70; former US 99 south; former I-110 east (1958–65)
0.101EMission RoadNo northbound exit
0.622AVignes StreetNorthbound exit and entrance
0.62–
0.82
2A-BAlameda Street – Union StationSigned as exit 2A southbound, 2B northbound
0.822BLos Angeles StreetNo northbound exit
1.10Spring StreetNorthbound exit only
1.102CBroadwaySouthbound exit and northbound entrance
1.40Temple StreetSouthbound entrance only
1.573 SR 110 to I-110 south (Harbor Freeway, Arroyo Seco Parkway) / Grand Avenue – Pasadena, San PedroGrand Avenue not signed southbound; signed as exit 3B southbound; north end of Santa Ana Freeway; south end of Hollywood Freeway[36] SR 110 exit 24A
2.484AGlendale Boulevard, Echo Park Avenue, Union Avenue, Belmont Avenue
2.864B SR 2 east (Alvarado Street)South end of SR 2 overlap
3.345ARampart Boulevard, Benton Way
3.765BSilver Lake Boulevard
Hollywood4.406AVermont Avenue
4.856BMelrose Avenue, Normandie Avenue
5.557 SR 2 west (Santa Monica Boulevard) / Western AvenueNorth end of SR 2 overlap
6.258ASunset BoulevardNo northbound entrance
6.528BHollywood Boulevard
6.918CGower Street
7.069AVine StreetSouthbound exit only
7.469BCahuenga Boulevard – Hollywood BowlSigned as exit 9A northbound
7.849CHighland Avenue – Hollywood BowlFormer SR 170 south; signed as exit 9B northbound
Hollywood Hills9.2211ABarham Boulevard – BurbankNo southbound exit
Studio City9.6011BUniversal Studios BoulevardNo southbound exit; serves Universal Studios Hollywood
10.3412ALankershim Boulevard – Universal City
10.5612BVentura BoulevardNo southbound exit
11.1112CVineland AvenueSigned as exit 12B southbound
Moorpark StreetNorthbound entrance only
11.8013 SR 170 north (Hollywood Freeway north) – SacramentoNorthbound left exit and southbound left entrance; US 101 north transitions onto Ventura Freeway west;[36] 170 south exit 5A
11.6513B SR 134 east (Ventura Freeway east) – PasadenaSouthbound exit and northbound entrance; US 101 south transitions onto Hollywood Freeway south;[36] SR 134 west exit 1A
11.8313ATujunga AvenueSouthbound exit and northbound entrance
12.8514Laurel Canyon Boulevard – Studio City
13.8815Coldwater Canyon Avenue
Sherman Oaks14.8916Woodman Avenue
15.9117Van Nuys Boulevard
16.9418Sepulveda BoulevardNorthbound exit and southbound entrance
17.1719A I-405 (San Diego Freeway) – Santa Monica, SacramentoI-405 exit 63B
Encino17.5019BHaskell AvenueNo southbound entrance
18.6120Hayvenhurst AvenueNorthbound exit and southbound entrance
19.2221Balboa Boulevard – Encino
20.2322White Oak Avenue
Tarzana21.2523Reseda Boulevard
22.2524Tampa Avenue
Woodland Hills23.2625Winnetka Avenue – Woodland Hills
24.3126ADe Soto Avenue, Serrania AvenueSigned as exit 26 southbound
24.8526BCanoga AvenueNorthbound exit and southbound entrance
25.3427 SR 27 (Topanga Canyon Boulevard) / Ventura BoulevardSigned as exits 27A (north) and 27B (south) northbound
25.7627CShoup AvenueNorthbound exit and southbound entrance
26.4528Fallbrook AvenueSouthbound exit only
26.8628Woodlake AvenueNorthbound exit and entrance
27.3629Mulholland Drive, Valley Circle Boulevard
Calabasas28.2930Parkway Calabasas
31.0632Las Virgenes Road (CR N1)– Malibu Canyon
31.9233Lost Hills Road
Agoura Hills32.7934Liberty Canyon Road
33.6935Chesebro Road – Agoura Hills
35.0436Kanan Road (CR N9)
36.1838Reyes Adobe Road
Westlake Village37.5439Lindero Canyon Road
Ventura
VEN 0.00-R43.62
Thousand Oaks0.7040 SR 23 south (Westlake Boulevard)South end of SR 23 overlap
1.6241Hampshire Road
3.0243ARancho RoadSigned as exit 43B northbound
3.1143B SR 23 north (Moorpark Freeway) – FillmoreNorth end of SR 23 overlap; signed as exit 43A northbound; SR 23 south exits 12A-B
4.0644Moorpark Road – Thousand Oaks
5.0545Lynn Road
6.1946Ventu Park Road – Newbury Park
7.0247ARancho Conejo Boulevard, Borchard RoadSigned as exits 47A (Rancho Conejo Boulevard) and 47B (Borchard Road) northbound
7.8947BWendy Drive – Newbury ParkSigned as exit 47C northbound
Camarillo10.7450Camarillo Springs Road – Camarillo Grove County Park
12.3052Santa Rosa Road, Pleasant Valley Road
13.7553AFlynn Road, Dawson Drive
13.8553B SR 34 (Lewis Road)
14.8054Carmen Drive – Camarillo
15.8955Las Posas Road
56Springville Drive
17.7557Central Avenue
Oxnard19.1759Del Norte Boulevard
20.0860Santa Clara Avenue, Rice Avenue
21.0161Rose Avenue
22.0162A SR 232 (Vineyard Avenue) – Oxnard
22.7362BOxnard Boulevard (SR 1)South end of SR 1 overlap
63AVentura RoadSouthbound exit only
VenturaR23.4563BJohnson Drive – MontalvoSigned as exit 63 northbound
R24.6564Victoria Avenue – Channel Islands Harbor
25.9765Telephone RoadNorthbound entrance is via Main St
26.3966A SR 126 east (Santa Paula Freeway) – Santa ClaritaSigned as exit 66 southbound; no southbound entrance; SR 126 west exit 1A
26.7266BMain Street (US 101 Bus. north) – VenturaNo southbound exit
28.4568Seaward Avenue
29.4569Vista del Mar Drive, Sanjon RoadNorthbound exit and southbound entrance
30.1570ACalifornia Street, Ventura Avenue
30.9170B SR 33 north (Ojai Freeway) – Ojai
31.5071Main Street (US 101 Bus. south) – VenturaSouthbound exit and northbound entrance
R32.7072 SR 1 north (PCH) – State BeachesNorth end of SR 1 overlap; northbound exit and southbound entrance
R38.9878 SR 1 south (PCH) – SeacliffSouth end of SR 1 overlap
Mussel ShoalsMussel Shoalssouthbound access only
La ConchitaSanta Barbara AvenueNorthbound access only
R43.5783Bates Road
VenturaSanta Barbara
county line
Northwest end of Ventura Freeway[36]
Santa Barbara
SB R0.00-90.99
CarpinteriaR0.6384 SR 150 east – Ojai, Lake Casitas
1.6185Bailard Avenue
2.6486ACasitas Pass RoadSigned as exit 86 northbound
3.0686BLinden AvenueSouthbound exit and northbound entrance
3.7787AReynolds Avenue, Santa Monica RoadSigned as exit 87 northbound
4.3487BCarpinteria AvenueSouthbound exit only
R5.2888Padaro Lane, Santa Claus Lane
R7.1490Padaro Lane – Summerland
R8.2691Evans Avenue – Summerland
Montecito9.0092Sheffield Drive
10.0293San Ysidro Road
Santa Barbara10.5494AOlive Mill Road, Coast Village RoadNo northbound entrance
94BHermosillo RoadNorthbound exit only
11.4194CCabrillo Boulevard, Coast Village RoadSigned as exit 94B southbound, no southbound entrance
95Los Patos Way (unsigned)Southbound exit only
95Salinas StreetNorthbound exit and entrance
12.7596Milpas StreetFormer SR 144; northbound exit signed as exit 96A; southbound as exits 96B and 96A
13.4996Laguna Street, Garden Street – Downtown Santa BarbaraLaguna Street/Garden Street northbound exit signed as exit 96B; Garden Street southbound exit signed as exit 96C
R14.1997Bath Street, Castillo Street; Santa Barbara Harbor
R14.7698ACarrillo Street – Downtown Santa BarbaraSigned as exit 98 southbound
15.2698BArrellaga StreetNorthbound exit and entrance
R15.7399AMission StreetSigned as exit 99 southbound
16.0599BPueblo StreetNorthbound exit only
16.55100Las Positas RoadFormer SR 225
17.78101ALa Cumbre Road, Hope Avenue
18.38101B SR 154 west / State Street – Cachuma Lake
18.92102El Sueno RoadNorthbound exit and entrance
20.06103Turnpike Road
Goleta21.15104APatterson AvenueSigned as exit 104 southbound
21.41104B SR 217 west – Airport, UCSBNorthbound exit and southbound entrance
22.53105Fairview Avenue
23.72107Los Carneros Road
24.77108Glen Annie Road, Storke Road
26.91110Winchester Canyon Road, Hollister AvenueAll ramps are via Cathedral Oaks Road
North end of freeway
South end of freeway
30.06113Dos Pueblos Canyon Road
North end of freeway
South end of freeway
32.84116El Capitan Ranch Road
33.85117El Capitan State Beach
36.62120Refugio Road – Refugio State Beach
North end of freeway
Gaviota44.82128Calle Mariposa ReinaInterchange
Gaviota State BeachSouthbound access only
46.30–
46.90
Gaviota Rest Area
47.19Gaviota Gorge Tunnel (northbound only)
South end of freeway
Las CrucesR48.85132 SR 1 north – Lompoc, Vandenberg AFBNorth end of SR 1 overlap
North end of freeway
South end of freeway
BuelltonR56.46139Santa Rosa Road
R57.12140A SR 246 – Lompoc, Solvang
R57.55140BMcMurray Road, Avenue of the Flags
North end of freeway
South end of freeway
62.67146 SR 154 east / Zaca Station Road – Los Olivos, Cachuma Lake
North end of freeway
South end of freeway
70.92154 SR 135 north – Los Alamos, Vandenberg AFB
North end of freeway
South end of freeway
78.69161Solomon Summit Undercrossing
Santa Maria82.18165Clark Avenue – Orcutt
166Union Valley Parkway
84.34167Santa Maria Way (US 101 Bus. north)
86.59169Betteravia Road – Sisquoc
87.60170Stowell Road
88.60171 SR 166 west (Main Street) – Santa Maria, GuadalupeSouth end of SR 166 overlap
89.69172Donovan Road
90.75173 SR 135 south (Broadway, US 101 Bus. south) – Santa Maria
San Luis Obispo
SLO 0.00-R69.32
0.81175 SR 166 east – Maricopa, BakersfieldNorth end of SR 166 overlap
Nipomo4.85179Tefft Street – Nipomo
181Willow Road
7.84182Thompson Road, Los Berros Road
North end of freeway
South end of freeway
Arroyo Grande12.52186Traffic Way (US 101 Bus. north), Fair Oaks AvenueNo northbound entrance
13.17187A SR 227 north (Grand Avenue, US 101 Bus. south)
13.75187BBrisco Road, Halcyon Drive
Pismo Beach14.61188Oak Park Road
15.581894th Street, Five Cities DriveSigned as exits 189 (4th Street) and 190A (Five Cities Drive) southbound
16.40190BPrice Street (US 101 Bus. north), Hinds AvenueNo northbound entrance; signed as exit 190 northbound
16.88191A SR 1 south / Wadsworth Avenue – Pismo BeachSR 1 exit southbound, Wadsworth Avenue exit northbound
17.76191BShell Beach Road, Price Street (SR 1 south, US 101 Bus. south)South end of SR 1 overlap
R19.81193Spyglass Drive, Shell Beach Road
R21.11195Avilla Beach Drive
R22.29196San Luis Bay Drive – See Canyon, Avila Beach
R24.30198Higuera Street
San Luis Obispo25.91200ALos Osos Valley RoadSigned as exit 200 southbound
26.83200BPrado Road, Elks LaneNorthbound exit and entrance
27.50201 SR 227 south (Madonna Road)
28.07202AMarsh Street
28.81202BBroad Street
29.08203AOsos Street, Santa Rosa Street
29.08203B SR 1 north – Morro Bay, Hearst CastleNorth end of SR 1 overlap
29.40203CCalifornia Boulevard
29.77203DGrand Avenue – Cal PolyNorthbound exit and southbound entrance
29.99204Monterey StreetNo southbound entrance
North end of freeway
South end of freeway
Santa Margarita37.85211 SR 58 east – Santa Margarita
42.27216ASanta Barbara RoadSigned as exit 216 southbound
42.90216BSan Diego WayNorthbound exit and southbound entrance
Atascadero44.01218ASanta Rosa Road
44.84218BCurbaril Avenue
45.57219 SR 41 (Morro Road)
45.96220ATraffic Way (US 101 Bus. north)
46.87220BSan Anselmo Road
48.33222Del Rio Road (US 101 Bus. south)
49.32223San Ramon Road, Santa Cruz Road
Templeton50.64224Vineyard Drive (US 101 Bus. north)
51.45225Las Tablas Road
52.44226Main Street (US 101 Bus. south)
Paso Robles53.89228 SR 46 west – Cambria, Hearst CastleSouth end of SR 46 overlap
55.67229Spring Street (US 101 Bus. north)Northbound exit and southbound entrance; former US 101
56.14230Pine StreetSouthbound exit and entrance
230Paso Robles StreetNorthbound exit and entrance
56.88231A17th StreetSouthbound exit and entrance
57.92231B SR 46 east (CR G14) – Fresno, BakersfieldNorth end of SR 46 overlap; signed as exit 231 northbound
58.76232Spring Street (US 101 Bus. south)No southbound entrance; former US 101
North end of freeway
South end of freeway
San Miguel65.08239AMission Street – San MiguelNorthbound exit and southbound left entrance
65.56239B10th StreetSigned as exit 239 southbound
67.23241AMission Street – San MiguelSouthbound exit and northbound entrance
R67.71241BCamp RobertsSigned as exit 241 northbound
Monterey
MON R0.00-101.32
R0.84244Camp Roberts
R2.15245East Garrison
R3.35–
R5.10
Camp Roberts Rest Area
R7.94251Bradley
R9.67252 CR G18 (Jolon Road) – Fort Hunter Liggett
R15.47258Alvarado Road
R17.86260Los Lobos Road
R21.99263Paris Valley Road – San Ardo
R29.90271Paris Valley Road – Lockwood
San LucasR32.02273 SR 198 east – San Lucas, Coalinga
R37.31278Wild Horse Road
King CityR39.77281First Street (US 101 Bus. north / CR G15 to CR G13) – King City
R40.72282ACanal Street
R41.18282BBroadway (US 101 Bus. south / CR G13) – King City
R41.95283 CR G14 (Jolon Road) – Fort Hunter Liggett
North end of freeway
South end of freeway
52.66293Espinosa Road (US 101 Bus. north, CR G16) – GreenfieldFormer US 101
Greenfield53.36294AOak Avenue
53.86294BWalnut Avenue
54.79295Thorne Road (US 101 Bus. south) – GreenfieldFormer US 101
North end of freeway
South end of freeway
Soledad60.40301Arroyo Seco Road
61.59302 SR 146 (US 101 Bus. north) – SoledadFormer US 101
62.70303Front Street (US 101 Bus. south)
64.63305Camphora Gloria Road
66.40307Salinas Valley State Prison
Gonzales69.37310Gloria Road (US 101 Bus. north), Alta Street – GonzalesFormer US 101
70.863115th Street
72.61313Old Stage Road (US 101 Bus. south) – Gonzales
North end of freeway
South end of freeway
Chualar76.97317Chualar
North end of freeway
82.47323Abbott Street (US 101 Bus. north) – SpreckelsInterchange; northbound left exit and southbound left entrance
South end of freeway
Salinas85.62326AAirport Boulevard
326BFairview AvenueNorthbound exit only
86.12326CMonterey PeninsulaSigned as exit 326B southbound
86.82327 SR 68 (John Street)
87.30328 To SR 183 (Market Street) – Santa Cruz
R88.24329Main Street (SR 183, US 101 Bus. south) – Salinas
R89.27330Laurel Drive
R91.01331Boronda Road (US 101 Bus. south)
92.19333Sala Road
North end of freeway
95.44336 SR 156 west / Vierra Canyon Road – Monterey PeninsulaSouth end of SR 156 overlap
96.14337San Miguel Canyon Road (CR G12)
98.37339Crazy Horse Canyon Road, Echo Valley Road
100.39Dunbarton Road to San Juan Road (CR G11)Closed in 2015 after the construction of the San Juan Road interchange
San Benito
SBT 0.00-R7.52
0.13342San Juan Road (CR G11) – Aromas, Watsonville
South end of freeway
3.01345 SR 156 east – San Juan Bautista, HollisterNorth end of SR 156 overlap
R4.90347 SR 129 west – Watsonville, Santa Cruz
R6.49349Betabel Road, Y Road
North end of freeway
Santa Clara
SCL R0.03-52.55
3.16353 SR 25 south – Hollister, Pinnacles National Park
South end of freeway
GilroyR4.94355Monterey Road (US 101 Bus. north) – Gilroy
R6.08356 SR 152 east (Pacheco Pass Road) / 10th StreetSouth end of SR 152 overlap
R7.53357 SR 152 west (Leavesley Road CR G9) – GilroyNorth end of SR 152 overlap
R10.27360Masten Avenue
San MartinR12.46362San Martin Avenue
Morgan HillR15.07365Tennant Avenue
R16.01366East Dunne Avenue – Morgan Hill
R17.82367Cochrane Road (US 101 Bus. south)
San JoseR21.25371Coyote Creek Golf Drive
R23.10373Bailey Avenue
R26.78377A SR 85 north (West Valley Freeway) – Mountain View, CupertinoSigned as exit 377B southbound; no northbound entrance; SR 85 south exit 1A
SR 85 northHOV access only; northbound exit and southbound entrance
R27.00377BSilicon Valley Boulevard, Bernal RoadSigned as exit 377A southbound
R28.61378 To SR 82 / Blossom Hill Road (CR G10), Silver Creek Valley RoadSouth end of Bayshore Freeway;[36] former SR 82
30.10380Hellyer Avenue
31.00381Yerba Buena RoadExit was separated northbound in 2014
31.70382Capitol Expressway (CR G21)
33.03383Tully Road
34.55385AStory RoadSigned as exit 385 northbound
34.87385B I-280 north / I-680 north – San Francisco, Downtown San Jose, SacramentoSigned as exit 384 northbound; I-680 exit 1B
R35.76386A SR 130 (Alum Rock Avenue) / Santa Clara Street
R36.14386BMcKee Road, Julian Street
387Mabury Road, Taylor StreetPlanned interchange scheduled to open in late 2021
37.73388AOakland Road, 13th StreetFormer SR 238
38.30388 I-880 (Nimitz Freeway) – Oakland, Santa Cruz, Los GatosSigned as exits 388B (north) and 388C (south); I-880 exits 4B-C
38.80389AOld Bayshore Highway, 4th StreetNo southbound exit
39.29389BBrokaw Road, First StreetSigned as exit 389 southbound
39.93390 SR 87 south (Guadalupe Parkway)Southbound exit and northbound entrance; SR 87 north exit 9B
San JoseSanta Clara line40.70391Trimble Road, De la Cruz Boulevard (CR G6) – Santa ClaraSigned as exits 391A (Trimble Road) and 391B (De la Cruz Boulevard) southbound
Santa Clara41.98392San Tomas Expressway, Montague Expressway (CR G4)
42.73393Great America Parkway, Bowers Avenue
Sunnyvale43.85394Lawrence Expressway (CR G2)
44.83395Fair Oaks AvenueSigned as exits 395A (north) and 395B (south) southbound
45.68396A To SR 237 east / Mathilda Avenue northNorthbound exit and southbound entrance
45.68396BMathilda Avenue south – SunnyvaleSigned as exit 396A southbound; former SR 85
46.13396B SR 237 east – Alviso, MilpitasSouthbound exit and northbound entrance; SR 237 west exit 3A
46.13396C SR 237 west (Mountain View Alviso Road)Northbound exit and southbound entrance; SR 237 east exit 3A
Mountain View47.01397Ellis Street
47.89398AMoffett Boulevard, NASA ParkwaySigned as exit 398 northbound
SR 85 southHOV access only; southbound exit and northbound entrance
48.10398B SR 85 south – Cupertino, Santa CruzSouthbound exit and northbound entrance; SR 85 north exit 24B
48.60399AShoreline Boulevard – Mountain ViewSigned as exit 399 southbound
48.97399BOld Middlefield WayNorthbound exit and southbound entrance
49.61400AAmphitheatre Parkway, Rengstorff AvenueSigned as exits 400A (Amphitheatre Parkway) and 400B (Rengstorff Avenue) northbound
Mountain ViewPalo Alto line50.32400CSan Antonio RoadSigned as exits 400B (north) and 400C (south) southbound
Palo Alto52.01402Oregon Expressway (CR G3)
52.17402Embarcadero Road
San Mateo
SM 0.00-26.11
East Palo Alto0.89403University Avenue (to SR 109)
East Palo AltoMenlo Park line1.87404 SR 114 (Willow Road) to SR 84 east
Menlo Park3.59406 SR 84 east (Marsh Road) – Dumbarton BridgeSouth end of SR 84 overlap
Redwood City5.39408 SR 84 west (Woodside Road) / Seaport BoulevardNorth end of SR 84 overlap
6.62409Whipple Avenue – Redwood City
San Carlos411Brittan AvenueSouthbound exit and entrance
8.40411Holly Street, Redwood Shores Parkway – San Carlos
412Harbor BoulevardSouthbound exit and entrance
Belmont9.55412Marine Parkway, Ralston Avenue – BelmontFormer Legislative Route 214
San Mateo11.15414AHillsdale Boulevard – Foster City
11.90414B SR 92 – Hayward, San Mateo Bridge, Half Moon BaySR 92 exits 13A-B
11.90414BFashion Island BoulevardNo northbound exit
12.69415Kehoe AvenueNorthbound exit and entrance
13.464163rd AvenueFormer SR 92
14.33417ADore AvenueNorthbound exit and entrance
14.33417Poplar AvenueSouthbound exit and entrance
14.69417BPeninsula Avenue – BurlingameNorthbound exit and entrance
Burlingame419AAnza BoulevardNorthbound exit and entrance
16.58419BBroadway – Burlingame
Millbrae17.95421Millbrae Avenue – MillbraeSigned as exit 420 southbound
San Bruno19.12422 San Francisco International AirportSouthbound exit is part of exit 423A
R20.39423ASan Bruno Avenue
R20.72423B I-380 west to I-280 – San BrunoI-380 west exit 6, east exits 6A-B
South San FranciscoR20.72423CNorth Access Road (I-380 east) – North Cargo AreaSouthbound exit is part of exit 423A
21.69424South Airport Boulevard
21.92425AGrand Avenue – Downtown South San FranciscoNo southbound entrance
22.71425BOyster Point Boulevard
425CSouth San Francisco (Airport Boulevard)Southbound exit and entrance
Brisbane23.39426ABrisbane, Cow Palace (Bayshore Boulevard)Northbound exit only
23.66426BSierra Point Parkway, Marina Boulevard – BrisbaneSigned as exit 426 southbound; southbound exit and entrance are located 1.2 miles (1.9 km) north of northbound exit and entrance
City and County of San Francisco
SF 0.00-R4.24
0.03429ATunnel Avenue – Candlestick Park
0.77429BThird Street – Cow Palace
1.11429CPaul AvenueNo northbound entrance; signed as exit 430A southbound
1.77430BSilver AvenueNo northbound entrance
1.98430A I-280 north – Downtown San FranciscoNorthbound exit and southbound entrance; I-280 south exit 54
1.98431 I-280 south – Daly CityI-280 north exits 54A-B
2.00431Alemany Boulevard, Bayshore Boulevard
2.92432Cesar Chavez Street, Potrero Avenue
4.10433AVermont StreetNorthbound exit only
R4.24433B I-80 east – Bay Bridge, OaklandSigned as exit 433 southbound; north end of Bayshore Freeway; south end of Central Freeway;[36] I-80 exits 1A-B
433CNinth Street – Civic CenterNorthbound exit and southbound entrance
434ADuboce AvenueNorthbound exit and southbound entrance
434BOctavia Boulevard to Fell StreetNorthbound exit and southbound entrance
North end of Central Freeway
Market StreetNo left turns
Geary BoulevardNo left turn from northbound US 101
BroadwayNo left turns from Broadway; no left turn from northbound US 101
Van Ness Avenue, Lombard StreetNo left turn from southbound Van Ness Avenue; no left turn from westbound Lombard Street
South end of Presidio Parkway
South end of freeway
L8.59437Marina Boulevard, Girard Road – Marina, Presidio
9.40438 SR 1 south (Park Presidio Boulevard) – Golden Gate ParkSouth end of SR 1 overlap
9.7143925th Avenue – View Area, Presidio, Golden Gate NRA, Fort PointNorth end of Presidio Parkway
Golden Gate Golden Gate Bridge
(Tolled southbound only; no state maintenance on bridge)
Marin
MRN L0.00-27.63
Sausalito0.10441H. Dana Bower Rest Area and Vista PointNorthbound exit and entrance only; south end of Redwood Highway
0.32442Alexander Avenue – Sausalito
0.89Robin Williams Tunnel under Waldo Grade
1.52443Spencer Avenue, Monte Mar Drive
2.48444Rodeo AvenueSouthbound exit and entrance connects to a dead end
3.33445ASausalito, Marin City
4.46445B SR 1 north – Mill Valley, Stinson BeachNorth end of SR 1 overlap
Strawberry446Seminary Drive
5.70447 SR 131 east (Tiburon Boulevard) / East Blithedale Avenue
Corte Madera7.37449AParadise Drive, Tamalpais DriveSigned as exit 449 northbound
7.66449BMadera BoulevardSouthbound exit and entrance
8.02450ALucky Drive, Doherty Drive
Larkspur8.60450BSir Francis Drake Boulevard – San Anselmo, Richmond Bridge, Kentfield
San Rafael9.63451AAndersen DriveSouthbound exit and entrance
10.00451 To I-580 east / Francisco Boulevard – Richmond BridgeNorthbound exit only
10.00451B I-580 east – Richmond Bridge, OaklandSouthbound exit and northbound entrance; I-580 west exit 1A
10.72452Central San Rafael
12.19454ALincoln AvenueNo northbound exit
12.69454BNorth San Pedro RoadSigned as exit 454 northbound
13.71455Freitas Parkway – Terra Linda
14.71456Lucas Valley Road, Smith Ranch Road
15.57457St. Vincent Drive – Marinwood
16.64458Nave Drive, Alameda del Prado – Hamilton Field
18.09459Ignacio Boulevard, Bel Marin Keys Boulevard, Entrada Drive – Hamilton Field
Novato18.94460 SR 37 east / South Novato Boulevard – Napa, VallejoSigned as exits 460A (SR 37) and 460B (South Novato Boulevard) northbound
R20.19462ARowland Boulevard (US 101 Bus. north)
R21.11462BDe Long Avenue – Downtown Novato
R22.00463Atherton Avenue, San Marin Drive (US 101 Bus. south)
26.90467San Antonio Road / Silveira Ranch Road
Sonoma2.94472APetaluma Boulevard South (US 101 Bus. north), Kastania Road
Petaluma3.58472B SR 116 east – Sonoma, NapaSouth end of SR 116 overlap
4.76474East Washington Street – Central Petaluma
5.76476Old Redwood Highway, Petaluma Boulevard North (US 101 Bus. south) – Penngrove
10.67479Railroad AvenueNorthbound exit and southbound entrance
Cotati12.00481AWest Sierra Avenue – CotatiNorthbound exit and southbound entrance
12.69481B SR 116 west (Gravenstein Highway) – Rohnert Park, Sebastopol, CotatiNorth end of SR 116 overlap; signed as exit 481 southbound
Rohnert Park13.88483Rohnert Park Expressway
15.02484AGolf Course Drive, Wilfred AvenueSigned as exit 484 southbound
15.53484BSanta Rosa Avenue (US 101 Bus. north)Northbound exit and southbound entrance
16.54485Todd Road
18.49487Yolanda Avenue, Hearn Avenue
19.00488ABaker Avenue, Santa Rosa Avenue, Corby Avenue
Santa Rosa19.66488B SR 12 – Sebastopol, SonomaSR 12 west exits 7A-B, east exit 7
20.09489Third Street – Downtown Santa Rosa
20.74490College Avenue
21.74491ASteele Lane, Guerneville RoadSigned as exit 491 southbound
22.52491BBicentennial WayNorthbound exit and southbound entrance
22.81492Hopper Avenue, Mendocino Avenue (US 101 Bus. south), Old Redwood Highway
24.86494River Road – Guerneville, Calistoga
25.90495AFulton Road – FultonClosed after the reconstruction of the Airport Boulevard interchange
26.33495Airport Boulevard, Fulton Road – Fulton
27.62496Shiloh Road
29.35498Old Redwood Highway – Central Windsor
30.67499Arata LaneNo northbound entrance
33.48502Healdsburg Avenue, Old Redwood Highway
Healdsburg34.55503Central HealdsburgNorthbound exit and southbound entrance
34.88504Westside Road – GuernevilleSouthbound exit and northbound entrance
36.27505Dry Creek Road – Healdsburg
R38.56507Lytton Springs Road, Alexander Valley Road
R40.03509Independence Lane
GeyservilleR41.43510 To SR 128 east / Geyserville Avenue – Geyserville
R43.37512 SR 128 east / Canyon Road (CR C1) – Geyserville, CalistogaSouth end of SR 128 overlap
R47.85517Asti
R49.05518Dutcher Creek Road – Stewarts Point
R50.43519South Cloverdale Boulevard (US 101 Bus. north, SR 128 Bus. west)
CloverdaleR51.62520Citrus Fair Drive
R53.40522 SR 128 west (US 101 Bus. south) – Fort Bragg, MendocinoNorth end of SR 128 overlap
Mendocino
MEN R0.10-T106.80
0.48525Geysers Road
North end of freeway
Hopland10.89 SR 175 east – Lakeport
South end of freeway
19.68544Burke Hill Drive
20.71545Cox-Shrader Road
R21.59546 SR 253 west – Ukiah, Boonville
UkiahR23.45548ATalmage (SR 222)
R24.06548BGobbi Street
R24.53549Perkins Street, Vichy Springs Road – Central Ukiah
R26.16551North State Street – Ukiah
27.41552Lake Mendocino Drive
30.43555ACalpella
30.83555B SR 20 east – Upper Lake, WilliamsSouth end of SR 20 overlap
R32.63557West Road – Redwood Valley
North end of freeway
South end of freeway
568 SR 20 west – WillitsNorth end of SR 20 overlap; former US 101 north
573 To SR 20 west / North Main StreetFormer US 101 south
North end of freeway
58.90Moss Cove Rest Area (southbound only)
Longvale59.31 SR 162 east – Covelo, Round Valley
61.82Irvine Lodge Road – Irvine Lodge Rest AreaNo left turn from US 101 south
82.50Empire Camp Rest Area (northbound only)
South end of freeway
R84.69609 SR 271 northFormer US 101 north
South LeggettR89.57614South Leggett (SR 271)Former US 101
North end of freeway
LeggettT91.25 SR 1 south – Leggett, Fort BraggFormer SR 208 south
South end of freeway
ReynoldsR101.89625 SR 271Former US 101
PiercyR103.81627Piercy (SR 271)Former US 101
Humboldt
HUM T0.00-R137.44
North end of freeway
Cooks ValleyT0.08 SR 271 south – Piercy, Cooks ValleyFormer US 101 south
South end of freeway
BenbowR8.60636Benbow
GarbervilleR11.13639ASprowel Creek Road (US 101 Bus. north) – GarbervilleNo northbound entrance
R11.50639BGarberville, RedwayNo southbound entrance
R14.31642Redwood Drive (US 101 Bus. south) – Redway
R17.91645Avenue of the Giants (SR 254), Hooker Creek Road – Phillipsville
R22.44650Miranda, Phillipsville
25.01653Salmon Creek Road
Myers Flat27.94656Myers Flat (SR 254)
33.22661Weott
35.70663South Fork, Honeydew (SR 254)
39.16667AAvenue of the Giants (SR 254)Southbound exit only
R39.67667Redcrest, Holmes
R43.32671Pepperwood, Redcrest, Holmes
R45.90674Avenue of the Giants (SR 254), Jordan Road – Pepperwood
R47.95676Stafford Road
North end of freeway
South end of freeway
R51.84679Rio Dell, Scotia (SR 283, US 101 Bus. north)
Rio DellR52.60680Davis Street
R53.38681Wildwood Avenue (US 101 Bus. south) – Rio Dell
North end of freeway
South end of freeway
Alton57.69685 SR 36 east – Hydesville, Bridgeville
Fortuna59.50687Kenmar Road (US 101 Bus. north) – Fortuna
60.4968812th Street
Fortuna61.53689Main Street (US 101 Bus. south)
62.23690Palmer Boulevard
Fernbridge63.10691Fernbridge, Ferndale (to SR 211)Northbound exit and southbound entrance
64.30692Loleta, Fernbridge, Ferndale (SR 211)
65.95694Loleta Drive
68.21696Hookton Road – Loleta
Eureka70.61698College of the Redwoods
72.03699Fields Landing
72.88700King Salmon Avenue
73.72701Humboldt Hill
74.77702Herrick Avenue, Elk River Road
North end of freeway
79.17 SR 255 north (R Street) / Myrtle Avenue – Samoa
ArcataSouth end of freeway
85.03712South G StreetSouthbound exit and entrance
85.83713 SR 255 south (Samoa Boulevard) – Arcata, Samoa, Sunny Brae
86.50714A14th Street – Humboldt State UniversityNorthbound exit and southbound entrance
86.94714BSunset Avenue – Arcata, Humboldt State UniversitySigned as exit 714 southbound
88.27716A SR 299 east – Weaverville, Redding
88.80716BGiuntoli Lane, Janes Road
R90.13718Central Avenue (US 101 Bus. north), North Bank Road (SR 200) – McKinleyville
McKinleyvilleR91.47719School Road
R93.00721Murray Road
R93.85722 Arcata-Eureka Airport
R95.62723North Central Avenue (US 101 Bus. south) – McKinleyville
R97.02725Crannell Road
98.07726AWesthaven DriveNorthbound exit and southbound entrance
98.36726B6th Avenue – WesthavenSigned as exit 726 southbound
Trinidad100.71728Trinidad
R102.90Trinidad – Southbound Rest Area
R103.37731Seawood Drive
R105.14Trinidad – Northbound Rest Area
R106.06734Patricks Point Drive
North end of freeway
South end of freeway
R126.09753Newton B. Drury Scenic Parkway northFormer US 101 north
Del Norte
DN M0.00-46.49
R0.15765Newton B. Drury Scenic Parkway southFormer US 101 south
R3.56768Klamath Beach Road (CR D8)
KlamathR4.64769 SR 169 east – Klamath, Terwer Valley
North end of freeway
Requa Road (CR D7) / Minot Creek Road
Crescent City25.84Elk Valley Road (CR D2) – Elk Valley Rancheria
27.01 CR D3 (Northcrest Drive)
Parkway Drive to Washington BoulevardInterchange; northbound exit and entrance
South end of freeway
R27.87791Washington Boulevard (CR D1)No northbound exit
R30.81794 US 199 north (Redwood Highway north) to I-5 – Grants PassNorthbound exit and southbound entrance; US 101 south transitions onto Redwood Highway south
North end of freeway
To US 199 / Elk Valley Cross Road (CR D2) – Grants Pass
Lake Earl Drive (CR D3) – Pelican Bay State Prison
36.26 SR 197 south (North Bank Road)
Fred D. Haight Drive (CR D4)
Smith River39.83Fred D. Haight Drive (CR D4) – Smith River
Sarina Road, Ocean View Drive (CR D5)
Smith River RancheriaMouth Smith River Road (CR D6)
Ocean View Drive (CR D5)
46.20Agricultural Inspection Station (southbound only)
46.49 US 101 north – Oregon CoastContinuation into Oregon
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

References

  1. ^ McNichol, Dan (2006). The Roads that Built America: The Incredible Story of the US Interstate System. New York: Sterling. p. 74. ISBN 1-4027-3468-9. 
  2. ^ Bureau of Public Roads & American Association of State Highway Officials (November 11, 1926). United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Washington, DC: U.S. Geological Survey. OCLC 32889555. Retrieved November 7, 2013 – via University of North Texas Libraries. 
  3. ^ a b c 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. 
  4. ^ Faigin, Daniel P. "Highway Statistics". California Highways. Retrieved July 15, 2011. [self-published source]
  5. ^ Masters, Nathan (November 10, 2015). "Why Southern Californians Love Saying 'the' Before Freeway Numbers". KCET. Retrieved August 4, 2017. 
  6. ^ California State Legislature. "Section 250–257". Streets and Highways Code. Sacramento: California State Legislature. Retrieved June 9, 2017. 
  7. ^ Federal Highway Administration (March 25, 2015). National Highway System: California (South) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 7, 2017. 
    Federal Highway Administration (March 25, 2015). National Highway System: California (North) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 7, 2017. 
  8. ^ Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012. 
  9. ^ Corwin, Miles (April 19, 1988). "Signal Removal on US 101 Gets Green Light After 34 Years". Los Angeles Times. Retrieved December 19, 2014. 
  10. ^ "First Phase OK'd for Novato Narrows Widening of Hwy. 101". The Press Democrat. Santa Rosa, CA. January 21, 2011. Retrieved July 14, 2011. 
  11. ^ County of Sonoma. "Sonoma County General Plan 2020 Open Space Community Separators". County of Sonoma. Retrieved July 14, 2011. 
  12. ^ National Park Service. "Plan Your Visit". Juan Bautista de Anza National Historic Trail. National Park Service. Retrieved September 9, 2010. 
  13. ^ Simon, Richard (December 19, 1994). "Hollywood Freeway Spans Magic and Might of L.A." Los Angeles Times. 
  14. ^ Starr, Kevin (2009). Golden Dreams: California in an Age of Abundance, 1950–1963. New York: Oxford University Press. p. 3. 
  15. ^ "Lights Out on an Era: Roads: After 40 years, the final traffic signal on US 101 in Santa Barbara is coming down. There will be an uninterrupted freeway along the coast between Los Angeles and San Francisco". Los Angeles Times. November 19, 1991. Retrieved March 17, 2015. 
  16. ^ King, John (January 3, 2007). "An Urban Success Story: Octavia Boulevard an Asset to post-Central Freeway Area". San Francisco Chronicle. 
  17. ^ Sinclair, J.P. (March–April 1960). "Freeways in District IV". California Highways and Public Works. Vol. 39 no. 3–4. pp. 13–32. ISSN 0008-1159. Retrieved August 2, 2015 – via Archive.org. 
  18. ^ Kuhn, Tillo E. (1962). Public Enterprise Economics and Transport Problems. University of California Press. p. 200. 
  19. ^ "All Lanes Open on 101—Finally". Morgan Hill Times. May 20, 2003. Archived from the original on July 14, 2011. Retrieved July 15, 2011. 
  20. ^ "Hwy 101 Opening Just Weeks Away". Morgan Hill Times. February 18, 2003. Archived from the original on July 20, 2011. Retrieved July 15, 2011. 
  21. ^ Staff (March 7, 2003). "US 101 Southbound to Open Next Friday". Morgan Hill Times. Archived from the original on July 14, 2011. Retrieved July 15, 2011. 
  22. ^ "US 101 Speedway". The Gilroy Dispatch. May 29, 2003. Archived from the original on July 19, 2011. Retrieved July 15, 2011. 
  23. ^ "Herhold: The Story Behind Joe Colla's Famous 1976 Highway Stunt". San Jose Mercury News. Retrieved October 10, 2014. 
  24. ^ "Bill Text". Archived from the original on October 6, 2014. Retrieved October 10, 2014. 
  25. ^ a b National Park Service (March 13, 2009). "National Register Information System". National Register of Historic Places. National Park Service. Retrieved April 19, 2010. 
  26. ^ Hawk, Diane (2004). Touring the Old Redwood Highway: Humboldt County. Arcata, CA: Hawk Mountaintop Publishing. p. 48. ISBN 0-9672162-4-9. 
  27. ^ Olney, Jennifer (August 8, 2013). "Construction begins on controversial Willits bypass". KGO-TV. Retrieved July 13, 2017. 
  28. ^ Olney, Jennifer (June 20, 2014). "Caltrans Ordered to Stop Work on Willits Bypass". KGO-TV. Retrieved July 30, 2014. 
  29. ^ Frisbie Jr., Phil (July 10, 2014). "Corps Lifts Permit Suspension on Willits Bypass Project". Caltrans. Retrieved July 13, 2017. 
  30. ^ Anderson, Glenda (November 3, 2016). "Willits Highway 101 bypass finally opens to traffic". The Press Democrat. Retrieved July 13, 2017. 
  31. ^ Carmona Jr., Ariel (November 3, 2016). "Willits bypass finally opens to fanfare and dedication to fallen hero". The Willits News. Retrieved July 13, 2017. 
  32. ^ Anderson, Glenda (June 27, 2017). "Final price of Willits bypass $159 million higher than reported". The Press Democrat. Retrieved July 13, 2017. 
  33. ^ California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation. 
  34. ^ California Department of Transportation (2005–2006). "All Traffic Volumes on CSHS". California Department of Transportation. 
  35. ^ California Department of Transportation. "U.S. Route 101 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. California Department of Transportation. Retrieved February 7, 2009. 
  36. ^ a b c d e f California Department of Transportation. "2014 Named Freeways, Highways, Structures and Other Appurtenances in California" (PDF). California Department of Transportation. Retrieved June 20, 2015. 

External links

KML is from Wikidata


U.S. Route 101
Previous state:
Terminus
California Next state:
Oregon
This page was last edited on 10 July 2018, at 03:41
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