For safe driving, it is necessary to have good vision, good judgment, and quick reactions. Alcohol as a sedative affects all of the above. Your ability to drive a car or any other vehicle safely may be affected even with alcohol levels below the legal level.
The message is clear: alcohol and driving are NOT combined. Drinking and driving will put you and others at risk of physical harm. You also risk of being arrested and convicted for drink-driving - an experience that may include legal fees, higher vehicle insurance, fines, loss of a driving license, and/or imprisonment.
If you go to friends for lunch or go out for a drink or have clubbing arranged, the best advice is to agree in advance who will be the driver of the group or arrange a taxi home.