Drugs and driving: new international study

The incidence of drugs among drivers injured or killed in road accidents is in the range of 14-17 per cent, according to a new report published by the International Transport Forum, a transport think tank at the OECD. Cannabis and benzodiazepines top the list of drugs involved in lethal motor accidents, according to the study.
January 25, 2012 Read time: 2 mins

The incidence of drugs among drivers injured or killed in road accidents is in the range of 14-17 per cent, according to a new report published by the 998 International Transport Forum, a transport think tank at the OECD. Cannabis and benzodiazepines top the list of drugs involved in lethal motor accidents, according to the study.

Based on road-side tests, surveys and questionnaires from 16 countries, the new report Drugs and Driving: Detection and Deterrence highlights alarming facts regarding drug use by motorists:

  • The prevalence of drug use by drivers in North America now rivals or exceeds that of drivers who have been drinking.
  • Of over 500 high school students surveyed in Canada, 19.7% admitted to driving within an hour of using cannabis.
  • 27% of over 3 400 drivers killed in road accidents in Australia had some form of drug in their body system. In 14% of cases it was cannabis.
  • In a study of injured drivers in France, 14% of drivers also tested positive for cannabis.
  • Drugs were found in over 40% of injured drivers in two groups tested in the Netherlands.

The risk of accidents increases dramatically when drugs are combined with even a small amount of alcohol. Unlike alcohol, drugs mean many different substances – illegal as well as prescription medication. Applying a common standard such as blood alcohol concentration is therefore difficult. A policy of 'zero tolerance' can target illegal drugs, but not legal medication.

 “There is not one drug with one effect, but multiple drugs with multiple effects on the human body”, explained Jack Short, secretary general of the International Transport Forum, on the presentation of the report. “Both illicit substances and prescribed medicine are involved. Current drink-driving measures and legislation do not take this into account.”

The drugs and driving issue is moving up the policy agenda in many countries. A major EU-funded research project called DRUID (Driving under the Influence of Drugs, Alcohol and Medicines) is currently being carried out across Europe. In the US, the 834 National Highway Traffic Safety Administration is planning a large-scale study to examine the risks associated with driving after drug use. The results of these projects will contribute greatly to an increased understanding of the issues involved and help establish public policy along with enforcement and prevention measures.

The executive summary of Drugs and Driving: Detection and Deterrence can be downloaded from www.internationaltransportforum.org.

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