California State Route 92

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State Route 92 marker

State Route 92
SR 92 highlighted in red
Route information
Defined by Streets and Highways Code § 392
Maintained by Caltrans
Length 27.769 mi[2] (44.690 km)
Existed 1964[1] – present
Major junctions
West end SR 1 in Half Moon Bay
  I-280 near San Mateo
US 101 in San Mateo
I-880 in Hayward
East end SR 185 / SR 238 in Hayward
Counties San Mateo, Alameda
Highway system
SR 91 SR 94

State Route 92 (SR 92) is an east-west highway in the San Francisco Bay area between Half Moon Bay near the coast (and State Route 1) in the west and downtown Hayward at its junction with State Route 238 and State Route 185. It is most notable for being the route that traverses the San Mateo Bridge. It has interchanges with three freeways: Interstate 280 (the Junipero Serra Freeway), U.S. Route 101 (the Bayshore Freeway) in or near San Mateo, and Interstate 880 (the Nimitz Freeway). It also connects indirectly to Interstates 238 and 580 by way of Hayward's Foothill Boulevard, which carries Route 238 and flows directly into Route 92.

Route description[edit]

Between Half Moon Bay and Interstate 280, Route 92 winds through the Coast Range as a narrow, mainly undivided two and three lane highway with a switchback turn. The east-bound uphill portion was upgraded with a long passing lane. Between Interstate 280 and Interstate 880 it is entirely a divided multilane highway, including the toll San Mateo-Hayward Bridge, the longest span across the San Francisco Bay. East of Interstate 880 the route becomes a divided surface street in Hayward, locally known as Jackson Street.

The freeway segment of SR 92 in San Mateo

State Route 92 traverses through significant habitat areas including wetland, California oak woodland, chaparral and grassland. In one serpentine soil location near Crystal Springs Reservoir, it passes near one of the only known colonies of the endangered wildflower Pentachaeta bellidiflora and near one of the limited number of colonies of the endangered Eriophyllum latilobum.

SR 92 is part of the California Freeway and Expressway System,[3] and a small portion near SR 1 as well as the entire portion east of I-280 are part of the National Highway System,[4] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[5] SR 92 is eligible for the State Scenic Highway System,[6] but it is not officially designated as a scenic highway by the California Department of Transportation.[7]


The San Mateo section was once referred to as the 19th Avenue Freeway which was the street name where the freeway now exits. Parts of the street remain. This section is also known as the J. Arthur Younger Freeway; J. Arthur Younger was a United States Representative who served during the 1950s and 60s. [1]

All of Route 92 that is not already a freeway or a toll bridge has been proposed as a freeway, none of which has been built. An upgrade of the intersection with Main Street in Half Moon Bay is in the late planning stage. The old cloverleaf interchange with Interstate 880 was rebuilt with direct ramp replacements for two of the tight "cloverleaf" ramps, and a new wider and taller overpass to carry Route 92 over Interstate 880. The project took four years, and was completed in October 2011.[8]

Major intersections[edit]

Aerial view of California highway 92, with its US 101 interchange and its path across the San Mateo Bridge

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).[2] 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.

County Location Postmile
Destinations Notes
San Mateo
SM 0.00-R18.80
Half Moon Bay 0.00 SR 1 – San Francisco, Santa Cruz West end of SR 92
0.20 Main Street – Downtown Half Moon Bay Former SR 1
5.19 SR 35 south (Skyline Boulevard) – Big Basin West end of SR 35 overlap
7.19 SR 35 north (Skyline Boulevard) – San Francisco East end of SR 35 overlap
  West end of freeway
R7.31 8 I-280 (Junipero Serra Freeway) – San Francisco, San Jose Signed as exits 8A (south) and 8B (north) eastbound; I-280 exit 33
San Mateo R7.93 9A Ralston Avenue – Belmont Former Legislative Route 214
R8.67 9B De Anza Boulevard, Polhemus Road
R9.38 10 West Hillsdale Boulevard
R10.56 11 Alameda de las Pulgas
R11.21 12 SR 82 (El Camino Real) Signed as exits 12A (south) and 12B (north)
R11.61 12C Delaware Street
R12.14 13 US 101 (Bayshore Freeway) – San Francisco, San Jose Signed as exits 13A (south) and 13B (north); US 101 exit 414B
Foster City R12.78 14A Mariners Island Boulevard, Edgewater Boulevard
R13.61 14B Foster City Boulevard, East Hillsdale Boulevard
San Mateo–
Alameda line
Foster City–
Hayward line
  San Mateo–Hayward Bridge over San Francisco Bay
ALA R0.00-8.22
Hayward R4.48 24 Clawiter Road, Eden Landing Road
R5.12 25A Industrial Boulevard
R5.76 25B Hesperian Boulevard – San Lorenzo
6.39 26 I-880 (Nimitz Freeway) – Oakland, San Jose Signed as exits 26A (south) and 26B (north); I-880 exit 27
  East end of freeway
6.78 Santa Clara Street Serves CSU East Bay
8.22 SR 185 / SR 238 (Mission Boulevard, Foothill Boulevard) to I-580 East end of SR 92; access to SR 185 is via a left turn on A Street from SR 238 north
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


  1. ^ Faigin, Daniel P. "County Highways - State Route 92". Retrieved 2008-07-21. 
  2. ^ 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. 
  3. ^ California State Legislature. "Section 250–257". Streets and Highways Code. Sacramento: California State Legislature. Retrieved June 9, 2017. 
  4. ^ Federal Highway Administration (March 25, 2015). National Highway System: San Francisco, CA (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 8, 2017. 
  5. ^ 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. 
  6. ^ California State Legislature. "Section 260–284". Streets and Highways Code. Sacramento: California State Legislature. Retrieved June 9, 2017. 
  7. ^ California Department of Transportation (September 7, 2011). "Officially Designated State Scenic Highways and Historic Parkways". Sacramento: California Department of Transportation. Retrieved October 8, 2017. 
  8. ^
  9. ^ California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation. 
  10. ^ California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
  11. ^ California Department of Transportation, California Numbered Exit Uniform System, State Route 92 Freeway Interchanges, Retrieved on 2009-02-07.

External links[edit]

Route map: Google

KML is from Wikidata