Careless drivers on the road who make poor judgements behind the wheel that put others at risk of endangerment, ultimately pissing people off and causing them to be hated or flipped the bird.
Traffic snarl up usually caused by drivers suspending common sense resulting in road rage, overlapping, chaos and generally poor judgement in execution of road rules.
Most of the time its in rush hour, accidents and a lane is closed or a bad storm.
You literaly have no option but to sit through it as you curse under your breath.