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Driver reaction time
Alcohol's effect on the brain slows down your reaction time. You need more time to respond to situations and hazards. If you are driving a car (or riding a motorcycle or bicycle), the perception of distance is increased. For example, if a cat runs out in front of the car, there will be a short delay between the time you will see the hazard and the time you will put your foot on the brake. It is estimated that one unit of alcohol can increase the time of distance perception by 20%.

Research shows that a driver who has consumed alcohol, will experience one or all the following behind the wheel:

•  He will underestimate the distance and the speed of other vehicles on the road
•  His vision will be affected
•  The reaction time will slow down and
•  It is almost certain that he will overestimate his abilities