1964 state highway renumbering

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 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 September 20, 1963. Signage changes took place by July 1, 1964.^[1]

Changes in sign routes

U.S. Routes

• U.S. Route 6 was truncated to Bishop. The part south of Bishop was replaced by U.S. Route 395, State Route 14, Interstate 5, State Route 11 (now renumbered Interstate 110), and State Route 1 to the old U.S. 6 terminus at the Los Alamitos Circle in Long Beach.
• U.S. Route 40 became Interstate 80.
• U.S. Route 40 Alternate became new State Route 113 and State Route 70.
• U.S. Route 40 Business became new State Route 123.
• U.S. Route 50 was truncated to Sacramento. West from Sacramento, it became new State Route 99, existing State Route 4, Interstate 5, Interstate 205, Interstate 580, and Interstate 80.
• U.S. Route 60 became Interstate 10 east of Beaumont and the new State Route 60 west from Beaumont to the East L.A. interchange.
• U.S. Route 66 was truncated to Pasadena, becoming State Route 11 (from U.S. Route 66 Alternate) and an extension of State Route 2. East of Pasadena, it was continued to be signed, but was officially State Route 248, Interstate 210, State Route 30 (extended from its pre-1964 route), State Route 66, Interstate 15 and Interstate 40.
• U.S. Route 66 Alternate became State Route 159.
• U.S. Route 70 became Interstate 10 and was eliminated in California (it now terminates in Globe, Arizona).
• U.S. Route 80 became Interstate 8.
• U.S. Route 91 became existing State Route 19, new State Route 214, part of new State Route 91, and Interstate 15.
• U.S. Route 99 was eliminated, along with U.S. Route 99E and U.S. Route 99W. South of Sacramento, US 99 became an extended State Route 111, a new State Route 86, Interstate 10, Interstate 5, and State Route 99. US 99E became Interstate 80, an extended State Route 65, a new State Route 70, and State Route 99, while US 99W became Interstate 80, a new State Route 113, and Interstate 5. US 99 north of the merge also became Interstate 5.
• U.S. Route 101 was truncated to Los Angeles, and was replaced by Interstate 5.
• U.S. Route 101 Bypass in the San Francisco Bay Area became a relocated U.S. Route 101.
• U.S. Route 101 Alternate in Southern California became part of an extended State Route 1.
• U.S. Route 101 Alternate from San Jose to San Francisco became a new State Route 82.
• U.S. Route 299 became the majority of the new State Route 299.
• U.S. Route 399 became an extension (and relocation) of State Route 33 and a new State Route 119.
• U.S. Route 466 became a relocation of State Route 41, a new State Route 46, a new State Route 58, and Interstate 15.
• U.S. Route 95, U.S. Route 97, U.S. Route 199 and U.S. Route 395 remained the same. (US 395 has since been truncated at Adelanto. and is now Interstate 15 and State Route 163.)

State Routes

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

This transport-related list is incomplete; you can help by expanding it.

• State Route 1 was extended south along U.S. Route 101 Alternate.
• State Route 2 was extended west along U.S. Route 66.
• State Route 7 replaced State Route 15 because of Interstate 15.
• State Route 9 was shortened and relocated along a formerly unsigned state route.
• State Route 14 replaced part of U.S. Route 6. Former SR 14 became part of State Route 91.
• State Route 26 replaced State Route 8 because of Interstate 8. Former SR 26 became part of Interstate 10.
• State Route 33 was extended south along U.S. Route 399.
• State Route 35 replaced State Route 5 because of Interstate 5. Former SR 35 became Interstate 605.
• State Route 42 had replaced State Route 10 several years before the 1964 renumbering, due to the closeness of Interstate 10.
• State Route 46 replaced part of U.S. Route 466.
• State Route 58 replaced part of U.S. Route 466. The new number was the same as the old legislative number, possibly by coincidence.
• State Route 60 replaced part of U.S. Route 60, as well as a new alignment.
• State Route 65 was relocated and extended north to replace part of U.S. Route 99E.
• State Route 66 replaced part of U.S. Route 66.
• State Route 69 replaced part of relocated State Route 65.
• State Route 70 replaced parts of truncated State Route 24 and former U.S. Route 40 Alternate.
• State Route 82 replaced part of relocated U.S. Route 101.
• State Route 86 replaced part of U.S. Route 99.
• State Route 91 replaced State Route 14 and part of U.S. Route 91.
• State Route 99 replaced much of U.S. Route 99 and U.S. Route 99E, with a new alignment between Sacramento and Olivehurst.
• State Route 113 replaced parts of U.S. Route 99W and U.S. Route 40 Alternate.
• State Route 119 replaced part of U.S. Route 399.
• State Route 237 replaced part of State Route 9.
• State Route 238 replaced part of State Route 9.
• State Route 273 replaced part of U.S. Route 99.
• State Route 299 replaced U.S. Route 299.

References

External links

• California Highways: State Highways Before 1964
• 1964 Highway Renumbering