Do all red light cameras have to have a "Photo Enforced" sign?

How can you tell the difference between a traffic monitoring camera for the lights or a red light camera? Do all red light cameras have the warning sign? What do red light cameras look like?Do all red light cameras have to have a "Photo Enforced" sign?
Red light cameras are usually a bit larger and have a strobe attached or nearby. Traffic monitors have no artificial light. You will see the strobe go of evey once and a while even when no one does a violation. Two reasons, calibrations and advertisement of the camera to decrease light running.



Signs are not needed at every intersection but some signs are needed saying something like Traffic Signals Camera Enforced near the entrances to the city.



No city I know keeps the information on what intersections have red light cameras secret. They want people to know since the cameras are there to stop people from killing others by running the light.



Check your cities web site for exact locations.



There is also a site that has all in the US.Do all red light cameras have to have a "Photo Enforced" sign?
Ok the monitoring cameras are mounted on the bars with the lights the red light cams are mounted on steel poles near the intersection they are a bundle of 2 cameras with a flash bulb attached at the top. And yes they should all have signs warning you that the intersection is photo inforced as most state courts require the signage to be inplace when the cameras are i operation. The sign with be a regulatory sign that says this intersection is photo enforced or something along those lines.