At one time, radar detectors were illegal in Connecticut. I couldn't mount one in the 1980's when I lived and/or worked there. Then in 1992, the state legislature legalized the use of detectors and ended what had been a 20 year ban.They are only illegal in a few states. I believe DC and Virginia are the two. In all of the other states if you do get a ticket while having a radar detector in plain sight it's sort of a HaHa for the officer.