What little (and potentially dangerous) things do other drivers do that just really tick you off?

One of mine is coming up!

Today: The nine mile long left turn lane!

I work right next to one of the busiest intersections in town, 40th and Summitview. One of the things that really steams me is eastbound traffic that thinks they have to get into the two way left turn lane a good two or three blocks from the intersection!  They then proceed as if the lane is dedicated just to them. Never mind that people traveling westbound may need to turn left. More than once, I've come head to head with some one that does this.  figure it out , people!

What things that other drivers do really hack you off?