Varies by state. In New York you can be cited and fined for impeding traffic. In California, a car on a two-lane road with five or more vehicles behind it is r

Varies by state. In New York you can be cited and fined for impeding traffic. In California, a car on a two-lane road with five or more vehicles behind it is required to pull into a designated turnout area to alleviate the jam. Failure to do so can result in a citation and fine.