San Francisco : Architect and Engineer, Inc · leaf 242
ignal Speed Lighted Sounded Applied per mi.. Aspect M.P.H. M.P.H. M.P.H. M.P.H. 180 Green 35 35 36 37 120 Yellow andGreen 25 25 26 27 75 Yellow 17 161/2 l7l/2 l8/2 None Red 1 1 10% 11% 12% The General Railway Signal Company is thecontractor for the Bridge Railways signal andinterlocking system. The… … This photograph shows the first electric train to cross the San Francisco-Oakland Bay Bridge. The occasionwas a test trip for the automatic cab control signal equipment. Informal ceremonies marked the event, with Former Governor Frank F. Merriam, chairman of the CaliforniaToll Bridge Authority, at…
Architecture · Building
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