Police don't know you are or aren't speeding. but they will see you drive style, When they see you keep pass other car, they think you are overspeed driver. then they will give you a snare.
1) you see one car close your in left and the car is so fast, 90% is police car. they will turn on radar when they in legal distance of detector your speed; or fast pass you , waiting for you in front of 5 miles.
2) Police see your have RD, they give you a snare. they use X band radar gun even 5~7 MIN. detector one time, or follow you.
I see one best snare is one Police car that it have SUV cover. they send sign to Green-Red light, make light is green before you reach light 1/4 miles. They entice you overspeed, and the Police car behind object and follow object 13 miles.
I don't like RD facade, their facade let every know you use RD. Someone know how cover RD but don't affect performan ?