Very few people in this country know how to drive anymore. It's not so much that people's poor driving pisses me off, more like it scares the crap out of me.
I live on a small road near the dead end of a slightly larger road. There's a small three-way intersection that I drive through to get to my house, I go straight, and have the right-of-way (no yield or light or anything). People turning onto the road have a full stop sign, yet because it's a dead end to their right they assume nobody ever goes down there, and tend to either not stop and just turn, or slow down then turn even with cars coming. If I'm going straight to my house and don't turn on my blinker, indicating I'm going right, people assume that I just don't use my blinkers and pull out right in front of me. In the two years I've been here I've almost hit at least 5 dozen people that way, and because of it every time I go past that intersection I have my foot over the brakes just in case.
IMO people need to be re-tested to get a license every few years, it'd be a pain but it's something that's obviously necessary, seeing how few people actually know the traffic laws and/or follow them.