Traffic lights and traffic officers' signals

Three-aspect traffic lights for vehicles Directional traffic lights with arrows Traffic lights showing flashing amber Flashing amber general-warning light Flashing amber lights for pedestrians and cyclists Alternately flashing red lights Signals for scheduled public-transport vehicles Reversible-lane control signals Pedestrian signals Cycle traffic lights Green-wave speed advisory signal Traffic officer facing the driver with arms outstretched: stop Traffic officer seen side-on with arms outstretched Traffic officer with one arm raised Traffic officer with arms at right angles Prolonged whistle blast: all traffic must stop