Driving north on I-91, just after you pass mile marker 13, you will be going up a hill. At the crest of the hill on the right shoulder of the road on the far side of the guard rail, there is a depression in the ground. When state troopers park their cars in this depression, it is absolutely impossible to see them. They use radar. Sometimes two troppers are in the "hole", one using radar, the other one in his car ready to take off after you if the first trooper gets you with the radar. They are there especially on Friday nights just waiting for tourists from MA, CT and NY. They’ll probably let you go at 70mph, but anything over that and they will definitely go after you. Please take heed of this one, because I promise you they will definitely get you. It is impossible to see them. Remember, right after mile marker 13. Good luck.