How do you know whether traffic lights have a camera to flash you if you run a red?

I think I went through a red today as it changed as I went through - how do you know if the traffic lights have a camera? I'm worried I'll get a ticket.How do you know whether traffic lights have a camera to flash you if you run a red?
Red Light Cameras have a flash when they take your picture, even in daylight.



Most cities iwth red light cameras have a sign posted on or near the pole where the camera is, to let motorists know about the camera.How do you know whether traffic lights have a camera to flash you if you run a red?
Well... Photo intersections usually display a warning sign that cameras are installed. The cameras that cities install are so high tech that it takes pictures and video with statistics. If your Hyundai Santa Fe is already in the intersection but crossed the limit line before the light turns red ... No worries.
Be advised that actual officers do survey camera footage for violations, so just because you don't see a flash... for example turning right with out stopping on a red light !