Prescription drugs, over-the-counter medications, and illegal drugs may cause impairment alone or in combination with each other and/or with alcohol. In every State and the District of Columbia, impaired driving is illegal. Whether by drugs—legal or illegal—alcohol, or a combination of both drugs and alcohol, impaired driving puts the driver, their passengers, and other road users at risk. In NHTSA’s National Roadside Survey conducted in 2013-2014, 20 percent of drivers surveyed tested positive for potentially impairing drugs. Let’s work together to share this life-saving message: Impaired driving is illegal and deadly.
Drugs and Driving
While we’ve long studied and understood the dangers involving drunk driving, we are still researching and learning about the effects of drugs on driving. Meanwhile, it has become an increasing public and governmental concern in the United States.
The 2013-2014 Roadside Survey of Alcohol and Drug Use by Drivers found an increase in the number of drivers testing positive for marijuana and other drugs that can impair driving skills compared to the 2007 survey findings. In the 2013-2014 survey, nearly one in four drivers tested positive for at least one drug that could potentially affect safe driving skills.
Drug-impaired driving is an important safety issue that NHTSA continues to research. The agency is working to develop new knowledge on how drugs affect driving, to grow new and enhance existing programs to reduce drug-impaired driving.
How Marijuana Affects Driving
NHTSA is dedicated to eliminating risky behaviors on our nation’s roads
Ideas, concerns, and thoughts
NHTSA wants you to join in the conversation about drug-impaired driving. Share your thoughts, concerns, ideas to us in an email. We'll summarize and add them to the appropriate idea board from the meeting.
Search for more resources
NHTSA Launches Drug-Impaired Driving Initiative and Announces March 15 Summit
Marijuana-Impaired Driving - A Report to Congress