Due to its indirect route, passenger operations were eventually replaced by bus service on Whittier Boulevard after 1938.

[3] Tracks were largely retained for use by freight trains, eventually becoming the Union Pacific La Habra Subdivision.

A short segment of the route is expected to be reactivated for passenger service as part of the Southeast Gateway Line.

[5] Operations were undertaken by the Los Angeles Inter-Urban Electric Railway in 1904 and they had double tracked the line by September 1904.

By September 1935, the number of departures was reduced to one round trip daily and service to Walker was regarded as its own local line.

From there, the double track Whittier Line ran easterly, in private way between dual roadways of Randolph Street, through Huntington Park, Vernon, Bell, and Maywood to reach the Los Angeles River.