Imagine being in a bar with a few of your good friends. Everyone is drinking and having a good time. Your are going to leave and go home, but you friends won't let you because they know the dangers of driving after having a few drinks. Instead they ca ll a cab to give you a ride home. You would be extremely lucky to have such smart friends. Drunk driving is a very serious problem in our society today, but it is becomming socially unacceptable causing the numbers of alcohol related traffic fatalites t o decline considerably.