People who drive slow in the left lane are a problem, people who pass on the right are also a problem. Both these problems can exist independently. (Frustrate

People who drive slow in the left lane are a problem, people who pass on the right are also a problem. Both these problems can exist independently. (Frustrated drivers don't have to pass on the right; on three-lane highways, people sometimes pass in the rightmost lane when the leftmost lane is free.)