I've often pondered #s 1 & 2 thinking about Virginia drivers on I-95.
As to Pennsylvania, the Keystone state has the oldest 4 lane limited access road in the nation (PA Turnpike) and some of the first roads of the Interstate system. They are showing their age. That's why there is so much construction on 81 and 78.
I noticed yesterday that on one of our overpasses there is a do not pass sign. If someone is crazy enough to pass, I don't think a sign will stop them. Yall can't have any worse drivers than we have in South Texas.