In a huge city, lighting the streets is a necessary but pricey precaution. Pedestrians and motorists are no doubt safer when streetlamps, not just car headlights, illuminate roadways and sidewalks — but streetlamps are expensive and inefficient to run. A prototype system that turns the lights on and off depending on traffic could save money while preserving safety.
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Can't believe no one ever thought of this!
I'm guessing it might have to be an LED bulb though cause switching on and off of other types of lights usually cause the filaments or gas to burn out quickly.
for sum reason i think by the time the lights turns on car would be long gone