I'd say the 3 most infuriating things for me;
- People who drive down a 750m long merge lane (500m straight), and aren't able to get up to more than 70 or 80kph on Stoney
- People who do not open a gap up if you signal
- People who speed up while being passed in the oncoming lane of an undivided highway
I guess it boils down to if you are not a least making the minimal effort to stay out of other peoples way, within the bounds of normal usage of the road, than you are not doing enough to keep the road a safe place.
Bonus mention for non-zipper mergers, but it's just too common to get mad about.
