This document discusses driver performance and the effects of alcohol and other drugs on driving. It covers six topics: introducing alcohol and choosing not to use it, the nature of alcohol-related crash problems, the physiological and psychological effects of alcohol, how alcohol and other drugs affect driving abilities, dealing with driver fatigue, and preventing road rage. The document provides information on Virginia's zero tolerance law for underage drinking and driving, factors that influence blood alcohol concentration, and guidelines for determining blood alcohol content from different types and amounts of alcoholic beverages. It aims to help drivers make responsible decisions about alcohol use and understand the dangers of drinking and driving.