KittySlayer
Grandmaster
My wife is not originally from Indiana, but she said this state is filled with drivers who feel it imperative to sit on the bumper of the car directly in front of them to prevent anyone else from merging or entering that lane.
So let's say it is heavy traffic and you are 30 feet from the back bumper of the car in front of you. Invariably some yahoo will zip into that space and suddenly you are 5 feet from the bumper of the car in front of you. Sometimes following closely is being a pr... and sometimes it is just safer.
Another spot to avoid is the blind spot of the driver beside you. Either move up a little or move back but don't hang out there in the invisible zone.