The Autobahn has no speed limit and is the safest road in the world. Why? Because they strictly enforce one rule, and one rule only: left lane is only for passing.

I live in Texas, and people drive slow in the left/passing lane all of the time. It’s not just a Pennsylvania thing. Many times, they are texting or talking on the phone. The rest are just ignorant. It doesn’t matter if they think “I’m doing the speed limit, so if you don’t like it, tough” because signs in many places say “slower traffic keep left.” If you are going the speed limit and have a line of cars stacked up behind you, then you are “slower traffic” and need to get in the right lane.