Key System

Beach Street Bridge (Alameda County, California)
Slab bridge over EBMUD Access Rd/Old Sacramento Northern Railway ROW on Beach Street/Oakland Terminal Railway ROW/Key System ROW
Open to traffic

San Francisco-Oakland Bay Bridge (San Francisco County, California)
Built 1936; Key System tracks removed 1958; rehabilitated 1962; partial collapse 1989; west span seismic retrofit 2013; east span replaced 2013.
Suspension bridge over San Francisco Bay on I-80 connecting San Francisco, Yerba Buena Island, and Oakland. New eastern span is a 1400 foot single anchored suspension bridge
Open to traffic