How does emotional arousal (e.g. anger, extreme joy, rushing due to time pressure) affect human cognitive processing while driving?

1. It improves reaction time by 500% and eliminates all driving errors
2. It impairs risk perception, increases aggressive tailgating and speeding, narrows attention, and increases reaction latency to peripheral hazards
3. It enables the human brain to see in the dark without vehicle headlights
4. It has zero physiological or psychological effect on driving performance