Middle lane hoggers. People driving around with no lights on the pitch black. People driving everywhere at 40mph (30mph zones, 40mph zones, 50mph zones...) People driving at 15mph everywhere until they reach a straight section, then fire off like roadrunner until they get to the next corner and slow back down to 15mph again. I'd rather they'd stay at 15mph so I can get past. People who stop every time another car approaches them in the dark. Pedestrians just wandering across the road without looking, even had it happen with someone pushing a pram! I live in the country where there are many places where the road is only wide enough for one vehicle. So is it too much trouble for drivers to acknowledge when someone else as obviously stopped to let you through. I've even resorted to putting my hand up to them to shame them into it! As a cyclist i'd also add: Idiots giving cyclists no room whatsoever. Life would be a lot safer and less stressful if people were more courteous and in less of a hurry.