I think it's a matter of using both lanes to travel. A lot of people don't obey the rules of the road. For example, it's the same posted speed in all lanes. I wonder if all those people breaking the law by speeding by me truly follow the left-hand law and get over ever?

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You have to remember that if they are passing someone driving slower in the right lane, their passing speed might not be the same speed you're crusing at. So, maybe, the speeding driver should readjust and follow the posted speed.