In my case, he doesn't need a radar, because I passed him. He drove a plain white pickup truck without any signs that I can tell a police car. OK. Here is the full story: I was driving on the bridge at around 80, limit is 55. I noticed he was following me. I thought he was just some dude trying to race me, so I floored my car, got to a little above 110. Now he was about 15-20 car length behind me. I slowed down to about 90. He caught up and flashed the lights. He told me that he gave me a break, and gave me a ticket for "violate traffic control device".