Traffic light
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Traffic lights, traffic signals, or stoplights – also known as robots in South Africa, Zambia, and Namibia – are signalling devices positioned at road intersections, pedestrian crossings, and other lo
An LED 50-watt traffic light in Portsmouth, United Kingdom
Traffic lights can have several additional lights for filter turns or bus lanes.
Horizontally-mounted signals in Japan
A traffic signal in Halifax, Nova Scotia, with specially shaped lights to assist people with colour blindness
In traffic engineering, there are regional and national variations in traffic light operation. This may be in the standard traffic light sequence or by the use of special signals.
Traffic light
…Traffic light control and coordination Traffic-light signalling and operation Traffic optimization…
Swedish traffic light (left) for use by public transport vehicles only. All signals use white lighting and special symbols ("S", "–" and an arrow) to distinguish them from regular signals. The small light at the top tells the driver when the vehicle's transponder signal is received by the traffic light.
A pole-mounted four-light signal with flashing yellow arrow for a left turn in Oregon
Right turn filter arrow in Liberec, Czech Republic
A T used for the street running section of the Parramatta Light Rail, in North Parramatta, New South Wales