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The following is a list of roads defined by the Streets and Highways Code, sections 250–257, as part of the California Freeway and Expressway System. [1] Some of the routes listed may still be in the planning stages of being fully upgraded to freeways or expressways. State Route 1 (part) State Route 2 (part) State Route 3 (part) State Route 4 ...
Minimum lane width: The minimum lane width is 12 feet (3.7 m), identical to most US and state highways. Shoulder width: The minimum width of the left paved shoulder is 4 feet (1.2 m), and of the right paved shoulder 10 feet (3.0 m). With three or more lanes in each direction, both shoulders are to be at least 10 feet (3.0 m) wide.
In the United States, the Interstate Highway standards for the Interstate Highway System use a 12 ft (3.7 m) standard lane width, while narrower lanes are used on lower classification roads. In Europe, laws and road widths vary by country; the minimum widths of lanes are generally between 2.5 to 3.25 m (8.2 to 10.7 ft). [ 13 ]
The northern segment is signed as I-238 and is a six-lane freeway that runs more east–west between I-580 and I-880 in San Leandro. The numbering of I-238 does not fit within the usual conventions of existing three-digit auxiliary Interstate Highways, where a single digit is prefixed to the two-digit number of its parent Interstate Highway as ...
The freeway portion from Chapman Avenue to SR 91 opened on January 18, 1962, at a cost of $4.6 million (equivalent to $35.5 million in 2023 [12]). [13] The segment between SR 73 and Chapman Avenue opened in 1966. [5] SR 55 was the first freeway in Orange County to receive carpool lanes, opened in October 1985 between I-405 and SR 91.
The freeway is one of the busiest freeways in the nation and is the busiest freeway in California. [10] The freeway's congestion problems have led to jokes that the road was numbered 405 because traffic moves at "four or five" miles per hour (6.4 or 8.0 km/h), or because drivers had spent "four or five" hours to travel anywhere.
The Sacramento region is getting closer to its first major freeway toll lane. Caltrans, the state of California’s highway authority, is seeking public input on a proposed $465 million express ...
A freeway "name" may refer to portions of two or more differently numbered routes; for example, the Ventura Freeway consists of portions of U.S. Route 101 and State Route 134, and the San Diego Freeway consists of portions of Interstate 5 and the full length of Interstate 405.