Really this is just a standard polic car waiting behind the supports of an overpass. The trick is that it’s on the other side of a hill that’s just high enough, you won’t see the potential for the trap until it’s too late.

I don’t remember the exact mile markers, but this was going North on I-390 in New York. The town of Groveland is small enough that there might actually only be the one overpass, and there were signs for "Town of Groveland". Sorry I can’t be more specific.