California State Route 238

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State Route 238
Defined by S&HC § 538, maintained by Caltrans
Length: 14.54 mi[1] (23.40 km)
Formed: July 1, 1964[2]
South end: I-680 in Fremont
Major
junctions:		 SR 92 / SR 185 in Hayward
North end: I-238 / I-580 in Castro Valley
State highways in California (list - pre-1964)
County routes in California (list)
< I-238 SR 241 >
History - Unconstructed - Deleted - Freeway - Scenic

State Route 238 is a north-south highway in the southeastern part of the San Francisco Bay Area, USA. A divided multilane surface highway, it connects Interstate 580 in Castro Valley and Interstate 680 in Fremont.

Contents

[edit] Route description

SR 238 goes through Hayward and Union City parallel to the Hayward Hills. It formerly contained a segment of east-west freeway now designated as Interstate 238 and, until Interstate 680 was completed in the area and supplanted it completely as a through route, extended to San José, California at its intersection with U.S. Route 101. Locally it is designated Mission Boulevard from I-680 to the intersection with State Route 92 and State Route 185 (which continues as Mission), then from that intersection to I-580 as Foothill Boulevard.

[edit] History

See also: Interstate 238

Before California massively renumbered its state highways in 1964, SR 238 was part of State Route 9. The segment of what is now Interstate 238 was built as a freeway in 1956,[1] before it became part of the Interstate Highway System in 1983.[3]

For several decades, SR 238 from Hayward to Fremont was also planned to be upgraded to a freeway, called the "Mission" or "Foothill" freeway.[2] It was submitted to the Interstate Highway System in October 1968 but was rejected.[3] Then after a series of lawsuits and appeals, Caltrans had to abandon the project in 2004 and sell off the property it had acquired in the name of eminent domain along the proposed route.[2]

As an alternative, SR 238 is proposed to be expanded from two lanes in each direction to three lanes in each direction along the majority of its width. Changes proposed also include a one way circulation through Central Hayward, and various improvements to traffic signals and closure of minor streets intersecting with SR 238. [4]

[edit] Major intersections

Note: Except where prefixed with a letter, postmiles were measured in 1964, based on the alignment as it existed at that time, and do not necessarily reflect current mileage.

The entire route is in Alameda County.

Location Postmile
[5][6][7]		 Destinations Notes
Fremont 0.00 I-680 – San Jose, Sacramento Interchange
3.31 SR 84 west (Mowry Avenue) – Centerville District, Newark, Dumbarton Bridge South end of SR 84 overlap
3.64 SR 84 east (Niles Canyon Road) – Sunol, Livermore, Niles District North end of SR 84 overlap
Hayward 12.61 SR 92 (Jackson Street) – San Mateo Bridge, San Mateo, San Jose
12.61 SR 185
Castro Valley 14.29 Castro Valley Boulevard, Mattox Road Interchange northbound and at-grade intersection southbound
R14.47 I-580 – Oakland, Stockton Northbound exit and southbound entrance
R14.47 I-238 to I-880 Northbound exit and southbound entrance

[edit] References

  1. ^ a b January 1, 2006 California Log of Bridges on State Highways
  2. ^ a b c California Highways: Interstate 238
  3. ^ a b California Highways: Interstate Highway Types and the History of California's Interstates
  4. ^ Route 238 Corridor Improvement Project
  5. ^ California Department of Transportation, State Truck Route List (XLS file), accessed February 2008
  6. ^ California Department of Transportation, Log of Bridges on State Highways, July 2007
  7. ^ California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006