Just slightly over half of US states require you to move right to yield to faster traffic. In some places it is completely allowable to drive the speed limit i

Just slightly over half of US states require you to move right to yield to faster traffic. In some places it is completely allowable to drive the speed limit in the left lane. https://www.mit.edu/~jfc/right.html https://www.mit.edu/~jfc/right.html