California Pacific, a subsidiary of the Los Angeles Traction Company, began interurban service to San Pedro over a narrow-gauge line in 1903.

[3] Pacific Electric assumed control of the railroad in 1911; the tracks north of Delta Junction were turned over to the Los Angeles Railway and became part of the F line.

[4] The route was converted to standard gauge (with some cutoffs made), and began operations on March 19, 1912.

The line south of Torrance was reduced to a single round trip to Harbor City in 1939, and passenger service was fully discontinued the following January.

The line was entirely single track in private right of way from South Los Angeles to San Pedro.

The line turned south at Delta into the private right of way between the dual roadways of Vermont Avenue and ran to Strawberry Park (at Compton Boulevard).