California State Route 92

State Route 92
Route information
Defined by Streets and Highways Code § 392
Maintained by Caltrans
Length:	27.769 mi[1] (44.690 km)
Existed:	1964[2] – 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
Highway system
State highways in California Interstate U.S. State Pre-1964 History Unconstructed Deleted Freeway Scenic ← 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

This route is part of the California Freeway and Expressway System^[3] and is eligible for the State Scenic Highway System.^[4] However, it is not a scenic highway as defined by Caltrans.^[5]

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.

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.^[6]

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.

History

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.

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).^[1] 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 [1][7][8]	Exit [9]	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
Alameda 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       Concurrency terminus       Incomplete access

References

External links

Route map: Bing / Google

Wikimedia Commons has media related to California State Route 92.

• Caltrans: Route 92 road conditions