Odd Traffic Signs Warn Motorists (Sep, 1931)
16 mph? Were early speedometers in binary?
Odd Traffic Signs Warn Motorists
ESPECIALLY designed to command instant notice of motorists, a new type of traffic signal, recently put into use in Philadelphia, is shaped like a diamond and equipped with a blinker light to give additional warning. The signals are installed at all corners likely to prove hazardous to speeding motorists.