Departure of London buses regulated by new "lighthouse" control signal tower; structure of steel with glass-sided cabin on top is now occupied by traffic regulator who has before him time table of 21 services, watch and switchboard.
Signal controls buses
Elec. Traction
Electric Traction ; 24 , n 3
1928
1 Fig.
Aufsatz (Zeitschrift)
Englisch
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