Los Alamitos Traffic Circle; current California State Route 1/former US Route 101 Alternate and US Route 91
Los Alamitos Traffic Circle is located in the city of Long Beach and presently a component of California State Route 1. Los Alamitos Traffic Circle was originally completed during 1934 and was originally designated as California State Route 3. Los Alamitos Traffic Circle would part of become US Route 101 Alternate in 1935, US Route 91 during 1947 and even for a brief time California State Route 18. California State Route 1 was designated as through Los Alamitos Circle during the 1964 State Highway Renumbering. Pictured as the blog cover photo is Los Alamitos Traffic Circle in 1942 when it was part of US Route 101 Alternate.
Part 1; the history of Los Alamitos Traffic Circle
What is now California State Route 1 (CA 1) from San Juan Capistrano (originally Serra) to El Rio was defined as Legislative Route Number 60 (LRN 60) as part of the 1919 Third State Highway Bond Act. At the time the State of California could not maintain highway mileage in cities which included Long Beach.
During 1933 the legislative barriers preventing the Division of Highways from maintaining urban highways was removed. Subsequently, construction of Los Alamitos Traffic Circle became an active Division of Highways project. Los Alamitos Traffic Circle opened during 1934 and likely is the second such design constructed in California (the first being the Belmont Traffic Circle of US Route 99 in Fresno).
The initial run of Sign State Routes were announced in the August 1934 California Highways & Public Works. CA 3 followed the entirety of LRN 60 which by proxy took it through Los Alamitos Traffic Circle in Long Beach. CA 3 originally carried the following definition:
A map depicting CA 3/LRN 60 passing through Long Beach can be seen in the August 1934 California Highways & Public Works. Los Alamitos Traffic Circle is shown to be the southern terminus of CA 19/LRN 168.
Los Alamitos Traffic Circle can be seen under State Maintenance on the 1935 Division of Highways Map of Los Angeles County-City of Los Angeles. Los Alamitos Traffic Circle was located at the junction of State Street, Bennett Avenue and Hathaway Avenue.
The completed Los Alamitos Circle can be seen facing westward towards State Street in the undated photo (post 1942) below. Los Alamitos Traffic Circle originally only had what is now the inner circle. The inner circle transitioned the implied connection of CA 3/LRN 60 from Hathaway Avenue to State Street.
On July 20th, 1935, the California State Highway Engineer notified the American Association of State Highway Officials (AASHO) Executive Secretary that US Route 101 Alternate (US 101A) had been designated over the entirety of CA 3/LRN 60. This measure put Los Alamitos Traffic Circle on the alignment of US 101A.