The American Journal of Epidemiology published a study on drugged driving (click HERE to see full report). According to the abstract, there is increasing public concern over substance abuse affecting traffic safety results.
The study assessed trends in alcohol and other drugs detected in drivers who were killed within 1 hour of a motor vehicle crash in 6 US states (California, Hawaii, Illinois, New Hampshire, Rhode Island, and West Virginia) that routinely performed toxicological testing on drivers involved in such crashes. Their findings?
Of the 23,591 drivers studied, 39.7% tested positive for alcohol and 24.8% for other drugs. During the study period, the prevalence of positive results for nonalcohol drugs rose from 16.6% in 1999 to 28.3% in 2010 (Z = −10.19, P < 0.0001), whereas the prevalence of positive results for alcohol remained stable. The most commonly detected nonalcohol drug was cannabinol, the prevalence of which increased from 4.2% in 1999 to 12.2% in 2010 (Z = −13.63, P < 0.0001). The increase in the prevalence of nonalcohol drugs was observed in all age groups and both sexes. These results indicate that nonalcohol drugs, particularly marijuana, are increasingly detected in fatally injured drivers.
In short, fatal car crashes involving pot use have tripled in the U.S. during the study period.
“Currently, one of nine drivers involved in fatal crashes would test positive for marijuana,” Dr. Guohua Li, director of the Center for Injury Epidemiology and Prevention at Columbia, and co-author of the study told HealthDay News.
Other comments and quotes offered in the CBS article included:
“This study shows an alarming increase in driving under the influence of drugs, and, in particular, it shows an increase in driving under the influence of both alcohol and drugs,” Jan Withers, national president of Mothers Against Drunk Driving, added.
“MADD is concerned anytime we hear about an increase in impaired driving, since it’s 100 percent preventable,” Withers said. “When it comes to drugged driving versus drunk driving, the substances may be different but the consequences are the same – needless deaths and injuries.”
Of course an article that ran in Forbes (click HERE) suggests that the study may have been flawed and that testing for certain chemicals may provide “false positives”:
If “drugged driving” means operating a motor vehicle with any detectable amount of cannabinol in your blood, “drugged driving” inevitably will rise after legalization as consumption rises. But having cannabinol in your blood is not the same as being intoxicated.
Still, driving while impaired in any way endangers yourself and other drivers. We each have a responsibility for traffic safety results and must be vigilant, sober drivers to continue to see improvements in crash rates.