Are there traffic cameras that detect speed violations as well as traffic light violations?

Yes, its called photo radarAre there traffic cameras that detect speed violations as well as traffic light violations?
Many states have cameras on major interstates that are designed to catch speeders. In CT, I-95, I-91, I-84 all have cameras to detect speeders.Are there traffic cameras that detect speed violations as well as traffic light violations?
There are no red light cams, or cameras which detect speed in NJ. In NY there are red light cams, I'm not certain about speed cams though.