キー・システム
After the Southern Pacific abandoned transbay service in 1941, the Key System acquired the rights to use its tracks and catenary on Shattuck north of Dwight Way and through the Northbrae Tunnel to The Alameda for the F-train. The SP tracks along Monterey Avenue as far as Colusa had been acquired by the Key System in 1933 for the H-train, but were abandoned in 1941. The Key System trains stopped running in April 1958. On December 15, 1962, the Northbrae Tunnel was opened to auto traffic.