Plain clothes Illinois State Trooper parks his squad car on Duffy Ln. on the east side of the bridge out of site to tollway traffic. He walks up to the center of the bridge where he uses handheld radar and a camera to trap speeders traveling northbound. I’ve only seen him radar southbound traffic once. I’m not sure if he radios ahead or sends a ticket in the mail. The cop is sneaky though. Today he was ducked down alongside the concrete barrier with his head barely sticking up above the top of it. It would be very hard to spot him from the tollway before he has you nailed.