Abstract
Differences between the casual drug user and the addict as they relate to driving performance and accidents, are studied. Effects of marijuana, barbiturates, tranquilizers, hallucinogens such as lysergic acid diethylamide (LSD) and glue sniffing are considered, as well as amphetamines, speed, and Benzedrine. The possible effect on driving skills of other drugs, used for medical treatment, is also considered.