The establishment of the Port of Los Angeles in the early 1900s spurred the development of the nearby city, and electric streetcars provided local transit services for workers and later military personnel.
California Pacific, a subsidiary of the Los Angeles Traction Company, began interurban service to San Pedro over a narrow-gauge line in 1903.
Several services offered a one-seat ride from San Pedro to downtown Los Angeles, Long Beach, and Balboa.
The last interurban service to San Pedro ran under the Los Angeles Metropolitan Transit Authority on December 7, 1958.
[2][5] While it was the most popular route in San Pedro, competition from parallel bus operators tempered its ridership potential.
[7][5] The line continued to see infrequent passenger service whenever the U.S. fleet was stationed at San Pedro, as interurban cars from Los Angeles would end their runs at the Harbor.
While local service was discontinued, tracks were maintained and were seeing regular use by 1942 as the bridge route over the harbor was deemed hazardous during wartime.