The Facts :

In spite of progress in reducing alcohol-impaired crashes, the drunk driving problem will not be solved until people change their attitudes toward drinking and driving.
Avoid driving if you've been drinking. Even a small amount of alcohol in your system can impair your ability to operate a vehicle safely.
Don't let your friends drive if they've had too much to drink. Someone who gets behind the wheel after he or she's been drinking is in danger of harming him or herself or others.
Plan ahead. If you plan to be drinking, your evening out will be safer and more enjoyable if you have decided ahead of time how you will get home safely and who will drive. It's best to designate a driver who won't be drinking.
A guide to understanding blood alcohol concentration and alcohol impairment is available at:
http://www.stopimpaireddriving.org/ABCsBACWeb/page2.htm