Ok, I have confirmed this ‘speed trap’ with a state trooper bud of mine. (He referrs it as ‘safety enforcement’). On I-91 north and south, between exits 14-24 there is this new 1 and 2 car speed trap. Usually involves 1 unmarked vehicle and 1 marked vehicle. The unmarked vehicle is a purplish colored GrandAM (looks to be around a 96 model or so). Does not look to have rear dash/deck lights, but does have a visor light (As i saw when he stopped someone.) You can identify this car because it usually is sporting a trunk antenna, and has a MA police association sticker in his back window. Car has normal plates, i think the last two digits are NW. He will clock you and radio ahead to another trooper that stops you. If working one car trap he will stop you. Similar trap on the MA pike (I-90) between W.Springfield exit and Ludlow exits. Frequently works with locals or other statie. I could have sworn once when I was behind this dude that I saw him with a radar detector, but maybe it’s a ploy to make him look normal or maybe it was the speed display for his radar gun. In either case, on that trip he nabbed someone. NOTE: WATCH OUT for this vehicle. If the person driving this car is workin with another cop he isn’t in uniform, and it looks like any other driver and car out on the road! DONT challenge or attempt to race!! Also I hear that this vehicle will be trolling side streets in the area as part of a program called "Safe Roads"