Let's have a lesson on tailgating. Obviously so many people think that 2 car lengths behind the car in front of you at 70 mph is a good idea. At 70 you are traveling about 110 feet per second. You are supposed to be 3 to 4 seconds behind so that comes out to be 330 to 440 feet. 40 feet isn't going to cut it when the guy in front slams on his brakes to miss that deer.