2006-10-16 18:00:44 · 11 answers · asked by got_bass 1 in Cars & Transportation ➔ Other - Cars & Transportation
sensors in the street.
2006-10-16 18:02:02 · answer #1 · answered by morningstar 3 · 0⤊ 0⤋
There is a little man inside the traffic light. He looks out for me when ever I come to a light and he changes it to RED so I have to stop.
Older lights have mechanical timers, newer computer and pressure sensors under the road surface.
2006-10-16 18:03:45 · answer #2 · answered by Eldude 6 · 0⤊ 0⤋
Some are on timers and some have an "eye" that tells them when traffic is waiting at the light...similar to the "eye" of the automatic doors.
2006-10-16 18:03:17 · answer #3 · answered by butrcupps 6 · 0⤊ 0⤋
They are programmed in a light sequence by computers inside each traffic light.
2006-10-16 18:03:22 · answer #4 · answered by Sal G 4 · 0⤊ 0⤋
they are automatic but sometimes when there is traffic they are manually controlled. whe it is really night time or really in the morning they are sensored so when a person comes it will turn green and then when they leave it is red
2006-10-16 18:04:14 · answer #5 · answered by ferrarienzo726 2 · 0⤊ 0⤋
dwarfs under the street watch the traffic and pull levers
2006-10-16 18:03:19 · answer #6 · answered by tommy beresford 3 · 0⤊ 0⤋
Timing, sensors or watched by security
2006-10-16 18:17:09 · answer #7 · answered by CL 2 · 0⤊ 0⤋
the sensor is in the form of a pressure plater...or a timer
2006-10-16 18:08:36 · answer #8 · answered by babydoll11000099874 3 · 0⤊ 0⤋
either by a timer, or a sensor
2006-10-16 18:02:07 · answer #9 · answered by USMCstingray 7 · 0⤊ 0⤋
timers&sensors
2006-10-16 18:03:15 · answer #10 · answered by Anonymous · 0⤊ 0⤋