There isn't anything that makes me more nervous to know I'm on a bus route and see a bus in my mirror, especially when a stop is coming up. They're so long and wide, stop frequently, and the driver is often stressed about getting to his stops on time so I have zero expectations that they change lanes to pass only to move back over to the curb 1/4 of a mile up ahead to drop off/pickup riders.

They pass, I catch up, they pass I catch up... CURSE YOU BUSSES AND YOUR NECESSITY!