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Verkehr
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keywords:(Verkehr)
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
Colour light signals for road traffic
Light signals for traffic regulation
Details of traffic control methods
Recommendations as to street traffic control signals
Traffic lights relieve congestion
Signals should move traffic not stop it