Los Angeles Railway rerouted many lines on May 9, 1920,[2] assigning them letter designations the following year.[3][4] The A line ran along
Adams;
Normandie Avenue; 24th; Hoover; Burlington;
16th;
Hill;
1st; Spring;
North Main;
Sunset;
North Broadway; Lincoln Park Avenue; looping back via Nort Main to Plaza; thence to west terminal over above route.[5] In 1924, the lines was split in two and was given numeric designations. The 2 West Adams and North Main Street Line operated on those streets as well as a portion of the former
C Griffith and Griffin Avenue Line. The 3 West Adams and Lincoln Park Line also ran on Main Street.[6] In 1926, the A-2 was rerouted to Griffin Park. The two routes were recombined in 1930 as a single A line.[7]
1932–1939
A new A line started service on June 12, 1932.[8][9][10] It was formed by the Adams Avenue segment of the former service and the Angeleno Heights segment of the
G Griffith and Angeleno Heights Line. A branch at Edgeware Road opened in 1934, and the main service was rerouted on this line starting in 1938.[11]
1939–46
Cars began running through the
Hill Street Tunnel in July 1939.[12] The final and longest lived routing of the A began service on September 25, 1939. It was predominantly formed from the old A line as well as
Temple Street taken from the
L West 11th and West Temple Street Line. Tracks on Fountain were removed from service in 1942, and the line ceased to operate on June 30, 1946.[7][13]
^"May 1: This Date in Los Angeles Transportation History". Metro Dorothy Peyton Gray Transportation Library and Archive. Los Angeles County Metropolitan Transportation Authority. Retrieved February 16, 2022. 1921: Large letter signs indicating the routes of different lines are placed on top of Los Angeles Railway streetcars.
^"Cars To Have Letter Signs"(PDF). Two Bells. Vol. 1, no. 48. Los Angeles Railway. May 2, 1921. p. 1. Retrieved February 16, 2022.