1964 state highway renumbering (California)

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This article is part of the
highway renumbering series.
Alabama 1957
Arkansas 1926
California 1964
Colorado 1968
Connecticut 1932; 1963
Florida 1945
Indiana 1926
Iowa 1969
Louisiana 1955
Maine 1933
Massachusetts 1933
Minnesota 1934
Missouri 1926
Montana 1932
Nebraska 1926
Nevada 1976
New Jersey 1927; 1953
New Mexico 1988
New York 1927, 1930
North Carolina 1934;1937;1940
Ohio 1923; 1927; 1962
South Carolina 1928; 1937
Texas 1939
Utah 1962; 1977
Virginia 1928; 1933; 1940
Washington 1964
Wisconsin 1926
Wyoming 1927

In 1963 and 1964, the California Division of Highways implemented a major renumbering of its state highways. The majority of sign routes—those marked for the public—kept their numbers; the main changes were to the legislative routes, which had their numbers changed to match the sign routes. A large number of formerly unsigned routes received sign numbers corresponding to their new legislative numbers. A smaller change was the removal and truncating of many U.S. Routes in favor of the Interstate Highways (designated in 1959), and the renumbering of State Routes that conflicted with Interstate numbers. Some U.S. Routes that were officially removed continued to be signed until the replacement Interstates were completed.

The state law authorizing the renumbering was passed on September 20, 1963. Signage changes took place by July 1, 1964.[1]

Changes in sign routes[edit]

U.S. Routes[edit]

State Routes[edit]

All available numbers up to and including State Route 255 were assigned in 1964; State Route 256 and above were assigned starting in 1965.[2]

See also[edit]


  1. ^ California Highways and Public Works, March-April 1964, Route Renumbering (PDF)
  2. ^ State Highway Routes, Selected Information - 1994 with 1995 Revisions (PDF)

External links[edit]