Headline: Driving Under the Influence of Drugs is Now Deadlier than Driving Under the Influence of Alcohol
You might have heard something on the news or read a news story, or perhaps you only caught the headline suggesting that drugged driving now surpasses drunken driving in fatal crashes. Well, not exactly. What these news stories are citing is an updated report from the U.S. Department of Transportation Fatality Analysis Reporting System (FARS). The FARS study surveyed data of drug and alcohol testing of drivers who died in a car crash and found that 44.6% of the drivers had drugs in their system, while only 39.1% had alcohol in their system. But the statistics are murky: not all fatally-injured drivers were tested for drugs or alcohol; 57% were tested for drugs and 70.9% were tested for alcohol. At first glance, the fact that more fatally injured drivers were tested for alcohol than for drugs and less showed positive for alcohol might seem to make an even better case for the claim that there are more fatalities due to drugged driving than drunken driving.
But that statistic doesn’t tell the whole story. FARS collect data from what the individual states report—and those reports can vary considerably. Not all states test an equal number of fatally injured drivers. For example, 2 states test 15% or fewer fatally injured drivers, while 9 states test 85% or more. The most frequently found drug in those that were tested was marijuana, being 35.6%. But as I have previously discussed, marijuana will be detected in a person’s blood long after the effects have worn off. The state data used by the NARS study does not distinguish between the active and inactive metabolites and THC levels.