[pr1us]

1.) Driving slowly in the left lane

2.) Rubbernecking

3.) Driving while doing things other than driving

4.) Cutting in line for the turn lane

5.) Not speeding up before, during, or after merging

6.) Blocking emergency vehicles

7.) Braking all the time in a jam

8.) Not using turn signals

9.) Pulling in front, then slowing down

10.) Not coping with an ending lane

the full article here:
The Ten Most Annoying Things People Do In Traffic

 

[dpfocjack]

The thing that drive me insane are people going the speed limit in the passing lane, and assholes who don't use an onramp to get to the necessary speed to merge with highway traffic. Watching them try at 45 only to fail and then slow down even more is irritating.