I saw a ISP Motor Speed Trap set up a few times this summer. They had like 6 of them lined up on an overpass, one a mile or so up from the overpass running radar, another on the other side a mile down doing same. They were replaced by patrol cars the next time I saw the "Speed Enforcement" set up a couple of weeks later. Both the ISP and IMPD Motors were using the IDPSC S1 Tacs for the speed traps. Found that interesting. Probably a joint thing they had going. But recently, I have only seen IMPD Motors doing this.