Are idiots. That may seem a bit harsh, but true nevertheless. I was going to Rochester yesterday on the thruway, and the NY game of leapfrog was going strong. I'm driving about 70mph with a couple hundred feet between me and the car ahead. The left lane empty ahead. Next thing I know, a car comes up on the left, passes me, whips over into my lane maybe a car length ahead of me, and stays in the right lane until he (or she) gets close to the truck ahead of me, when the car whips into the left lane, passes the truck and whips back into the right lane. If it was just one now and then it would be one thing but it's over and over, cars, trucks, semi's, buses. Maybe it's that I learned to drive in Calif where the faster traffic stays left, but to me this NY stay to the right leapfrog is stupid and dangerous.