In Reply to: Re: TRAFFIC LIGHTS frequency posted by The Big O on June 26, 2000 at 16:41:51:
: : i notice my radar detector now goes off at every intersection. the signal changes with the light. i know this is to allow the police/fire to change the light. it would be pretty cool to be able to do that, not that i would. wondering how.
: Today when an aid or a fire vehicle was responding somewhere, I heard it radio dispatch, give the location of the light, and ask to turn it red.
I dont know about any frequencies they emit but i do know that they have photo cell sensors that look like a small eyesomewhere on the crossbeam where the lights hang.if you have the right angle you can flash your brights on and off a few times and change the light green immediately for yourself. another way is to have a super bright flashlight or spotlight and aim it straight at the photo cell and flash it on and off quickly