Not in my state. And probably few, if any others. But it is a safety thing. The longer you spend in the oncoming lane completing a pass, the higher the risk of

Not in my state. And probably few, if any others. But it is a safety thing. The longer you spend in the oncoming lane completing a pass, the higher the risk of a collision (cars pulling out of driveways into the lane, people misjudging distances, etc.). There's also what I've observed (not sure if there's an official name for it), that if you pass someone slowly, they will "lock tractor beams" onto you and start to match your speed. So you want to have a noticeable speed difference between your vehicles to prevent this.