The task of a driver on the road is very tough. Maintaining presence of mind is very important and many decisions is to be taken in a split of a second. A driver who is drunk cannot perform these tasks and would endanger traffic safety . A druken driver lacks the following things...
Alertness in perceiving a danger in the road and reacting to it quickly.
Accuracy of vision.
A broad range of vision to take note of events taking place on either side of the road without turning head in either direction.
Ability to perceive distance between two moving objects and their relative position in space.
Capacity to distinguish accurately between three traffic light colours e.g. green, amber and red.
Ability to drive the vehicle safely during night hours.
Ability to recover the glare effect quickly.
So, it is also advised.. Dont drink and drive..