Lighting Research Center

Advancing the effective use of light for society and the environment

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Lighting for Roadway Signals

Traffic signals are signaling devices positioned at road intersections in order to control traffic coming from different directions. Standard light colors are red, amber, and green. Recently, manufacturers of traffic signals have begun to use LED technology in traffic signals.


Highlighted Projects

failed traffic signalMaintaining LED Traffic Signals
LED traffic signals have lived up to their promise for an energy-efficient lighting solution for US highways. However, some modules have failed sooner than expected. The LRC examined LED traffic signal maintenance and monitoring issues and developed recommendationsfor replacement strategies.
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The following lists include articles and presentations on related subjects.

Traffic Signals
Pedestrian Signals


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