Synonyme wurden verwendet für:
Verkehr
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keywords:(Verkehr)
Following up time, fast or carded freight
Signal systems for speeding traffic and avoiding accidents
Co-ordinating traffic movement in existing streets
Co-ordinated lights and rerouting speed up Chicago's loop traffic
Traffic signals fitted to complicated intersections
Recommendations as to street traffic control signals
Colour light signals for road traffic
Details of traffic control methods
Light signals for traffic regulation
Traffic lights relieve congestion