I have seen 3 "speed enforcement" squad cars (the newer ones with the vector lightbar, not strobes) hidden on the north side of the bridge by 14th and Ashland. I have spotted them before as it is a regular practice, yet this one time they caught me because I was trying to pass another vehicle. He claims he used Radar to measure my speed, yet I saw no radar gun, nor did my radar detector go off? The speed limit is 30MPH, for ALL Chicago streets, so watch out.