ⓘ List of Interstate Highways in California. This is a list of Interstates in the U.S. state of California that have existed since the 1964 renumbering. It includ ..

                                     

ⓘ List of Interstate Highways in California

This is a list of Interstates in the U.S. state of California that have existed since the 1964 renumbering. It includes routes that were defined by the California State Legislature but never built, as well as routes that have been entirely relinquished to local governments.

Each state highway in California is maintained by the California Department of Transportation Caltrans and is assigned a Route officially State Highway Route number in the Streets and Highways Code Sections 300-635. Under the code, the state assigns a unique Route X to each highway, and does not differentiate between state, US, or Interstate highways.

                                     

1. Overview

  • The years are when legislative action was taken, not when real-world changes were made.
  • Former termini are not shown if they are along the current route, meaning that the route was simply extended.
  • If a route was renumbered, the old or new number is given in the "notes" column.
  • One Interstate Highway - Interstate 305 - is defined only federally; the state calls it part of US 50. It was signed as part of Business Interstate 80, the only state-maintained Interstate business route in California.
  • Lengths for each state route were initially measured as they were during the 1964 state highway renumbering or during the year the route was established, if after 1964 based alignment that existed at the time, and do not necessarily reflect the current mileage. Portions of some routes have been relinquished to or are otherwise maintained by local or other governments, and may not be included in the length listed below. Several routes are broken into non-contiguous pieces, and their lengths may not reflect the overlaps that would be required to make them continuous. Some routes may also have a gap because it is either explicitly defined in the California Streets and Highways Code or due to an unconstructed portion, and the listed length may or may not reflect the gap.
  • Concurrences are not explicitly codified in the Streets and Highways Code; such highway segments are listed on only one of the corresponding legislative route numbers - for example, the I-80/I-580 concurrency, known as the Eastshore Freeway, is only listed under Route 80 in the highway code while the definition of Route 580 is broken into non-contiguous segments. When a highway is broken into such segments, the total length recorded by Caltrans only reflects those non-contiguous segments, and does not include those overlaps that would be required to make the route continuous.
  • Since the 1990s, a number of piecemeal relinquishments have been made. These are generally reflected in the length but not the termini.
                                     
  • mainline Interstate Highways these highways also meet all Interstate Highway Standards with rare exceptions they receive the same percentage of federal
  • There are 70 primary Interstate Highways in the Interstate Highway System, a network of controlled - access freeways in the United States. They are assigned
  • This is a list of state highways in the U.S. state of California that have existed since the 1964 renumbering. It includes routes that were defined by
  • Interstate highways The California Highway Patrol CHP is tasked with patrolling all state highways to enforce traffic laws. California s highway system
  • Interstate 40 I - 40 is a major east west Interstate Highway in the United States, stretching from Barstow, California to Wilmington, North Carolina.
  • In the United States, future Interstate Highways include proposals to establish new mainline one or two - digit routes to the Interstate Highway System
  • Interstate 980 I - 980 is a short 2.0 - mile 3.2 km auxiliary Interstate Highway spur entirely within the City of Oakland in Northern California connecting
  • 80 Business in Sacramento, California Unlike auxiliary Interstate Highways business Interstates can be repeated in several locations in the same state
  • Interstate 80 I - 80 is a transcontinental Interstate Highway in the United States, stretching from San Francisco, California to Teaneck, New Jersey
  • connections via other highways or based on future plans to fill in the gap in the Interstate or simply based on the shortness of the gap. The sections
  • Interstate 10 I - 10 is a transcontinental Interstate Highway in the United States, stretching from Santa Monica, California on the Pacific Ocean, to