Are the street lights (as in the red, yellow, green ones) on timers or do they have sensors when a car comes?
Please respond thanks !
2007-09-01 13:50:21 · 5 answers · asked by Kale 1 in Cars & Transportation ➔ Maintenance & Repairs
They come in both styles. It depends on which ones your city engineers installed. At busy intersections they usually put the timer type in so it will continue to flow both ways. At slower intersections they usually put in the sensor type so when a car pulls up it starts the cycle to change the light.
2007-09-01 14:02:21 · answer #1 · answered by Sheerhose 4 · 1⤊ 0⤋
There was a time many years ago that they were on timers. Nowadays they have sensors under the pavement.
2007-09-01 20:59:15 · answer #2 · answered by tronary 7 · 0⤊ 0⤋
some have sensors but most are on timers
2007-09-01 20:56:42 · answer #3 · answered by bungee 6 · 1⤊ 0⤋
Both. It depends on the intersection.
2007-09-01 20:55:50 · answer #4 · answered by Jody D 6 · 1⤊ 0⤋
both systems are common bepending on history of traffic patterns
2007-09-01 20:58:52 · answer #5 · answered by John St.Louis 5 · 1⤊ 0⤋