Are problem drinkers dangerous drivers? An investigation of arrest of drinking and driving, serum gamma glutamyltrans- peptidase activities, blood alcohol concentration, and road traffic accidents: The Tayside Safe Driving Project.

Serum Gamma glutamyltranspeptidase activity was measured in 440 drivers at the time of arrest for driving under the influence of alcohol. The results were compared with information gathered by the arresting police officer. One third of drivers over the age of 30 had abnormal gamma glutamyltranspeptidase activities at the time of arrest. These findings argue against the Department of Transport's criteria for high risk offenders and indicate a clear need for new measures against problem drinkers among drinking and driving offenders.