I guess what is the definition of a tailgater? I still say there is a benefit for both front and back at a normal rush hour following distance and even something at the 2 sec distance. Actually tailgater's often pay close attention to what the car in front is doing and if you think about it, in the even of a panic stop the differential in speed would be less because the car in front can't get to zero before the collision happens. If they are following back further an all relaxed not paying attention, the car in front can make a full stop and a full speed collision can happen. I normally don't tailgate because I like to set cruise and not have to mess with speed adjustments but if somebody drives behind me I'm OK with that also.
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