Information on the toll roadways on the Riverside Freeway (State Route 91) in metro Los Angeles.

UC Davis and Caltrans highway research center.

Backroads and byways of the San Francisco Bay Area, written from a sports-car driver's perspective.

Caltrans is the state agency responsible for highway, bridge, and rail transportation planning, construction, and maintenance.

This electronic toll collection system lets drivers electronically pay tolls on California's bridges and toll roads without stopping.

Live traffic incident information from the CHP computer system.

Brief history and status of every numbered highway in the state.

Statewide coverage.

Photos, articles and vintage construction information about California's road network.

Gives detailed history and other information on county, state, U.S. and Interstate facilities in the state. Includes links to pages within the cahighways.org domain.

Descriptions of scenic and challenging backroads.

Covers many aspects, including Historic U.S. highways and the unusually-numbered I-238.

Several freeway plans for the San Francisco Bay Area and California highway signs.

Information on both a book and a board game on Los Angeles alternate routes, as well as information on their creator.

Photos and information on some built and unbuilt freeways.

A community grass-roots organization dedicated to the rebuilding and expansion of the regional freeway and thoroughfare system.

Examines the area's highway past, present and future.

Private website disapproving of the California Department of Transportation.

Describes the process of the construction of I-105 (Century Freeway) near Los Angeles.

Information, ideas, and views on Northern California facilities, with an emphasis on the Santa Cruz and Monterey Bay areas.

Labor/contractor group advocating increased public investment in state infrastructure, including mass transit and highways.

Includes live freeway speed maps and traffic incident summaries for many locations around the state.

Information and tidbits from a Southern California perspective.

Maps, photos and history of the pioneer highway between Bakersfield and Los Angeles.

Addresses the erosion problem on the Pacific Coast Highway (SR 1).

Maintains the Orange County toll roads.

Information about old closures of SR 1 (Pacific Coast Highway) at Big Sur due to a landslide.