Didn't catch this thread the first time. I feel your road rage, Aqizzar.
I don't get upset with people who make mistakes. I make mistakes. I look at it this way. If it's safe for me to say that I probably do something stupid (but not dangerous) that might annoy someone else once every few hundred times I take to the road, and I see at least a few hundred cars every half hour that I drive, then I am guaranteed to encounter somebody doing something stupid on the road every day. It's ok. I get it. No big deal.
What bothers me is exactly what you described. The people who are either completely oblivious or intentionally slow down traffic. The people who drive the same way they would go out for a leisurely stroll through the park. The people who take 5 seconds to even begin to move when the stoplight turns green, and take three times as long as they should to reach the speed limit. The people who fucking pace each other doing this shit.
If nobody slows me down, my commute takes 10 minutes. On average it takes me 16-18, and I'm only really safe if I give myself 25. I get stuck behind people doing 30 in a 45 almost every day. There are 7 street lights I must pass through, and I'm sometimes forced to hit every single one because people don't accelerate at the rate that the lights are timed for. Sometimes I have to sit through multiple rotations because the 3 or 4 vehicles in front of me take that damn long to get moving. I get pissed off at slow people every fucking day.
And being on a motorcycle rarely helps. It would be fucking **glorious** if it were legal for motorcycles to go between lanes like I've heard it is in most of the world outside the U.S.... and California. I wouldn't do it in moving traffic, but I would be right up at the front of the pack at every goddamn red light and always have open road in front of me.
And my speeding habits... 8 mph over the limit in areas where I know the risk of getting pulled over to be quite low, and 4 mph over everywhere else.