A large study by U.S. highway safety regulators found that more than half the people injured or killed in traffic crashes had one or more drugs or alcohol in their bloodstreams. Matt Rourke/AP hide caption
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A row of crosses form a memorial along Highway 33 as police officers survey the scene a day after a crash killed nine people south of Coalinga, Calif., on Jan. 2, 2021. Eric Paul Zamora/The Fresno Bee via AP hide caption
Car keys are shown by glasses with alcohol in this stock photo illustration. Companies are developing technology that would allow cars to stop people from driving when drunk. Peter Dazeley/Getty Images hide caption
The Driver Alcohol Detection System for Safety Program seeks to develop devices that will automatically detect when a driver is intoxicated with a blood-alcohol concentration over the legal limit. Courtesy of Driver Alcohol Detection System for Safety Program hide caption
A fridge holds Anheuser-Busch's Budweiser and Grupo Modelo's Corona Light beers. Lawmakers are touting craft breweries as the winners from the tax cuts, but public health officials are concerned about lost tax revenues and rising public costs. Joe Raedle/Getty Images hide caption
Although consuming cannabis is legal in Colorado and several other states, driving while under the influence of the drug is not. Nick Pedersen/Getty Images hide caption
Public safety experts and advocates disagree about what conclusions can be drawn from data on the presence of alcohol or other drugs in the bodies of people involved in deadly crashes. juefraphoto/Getty Images/iStockphoto hide caption
Drivers distracted by their devices are a well-documented, rising cause of traffic crashes, but there are a growing number of pedestrians, too, who can become oblivious to traffic around them. Bebeto Matthews/AP hide caption
Distraction, On Street And Sidewalk, Helps Cause Record Pedestrian Deaths
The highly rated variety of medical marijuana known as "Blue Dream" was displayed among other strains at a cannabis farmers market in Los Angeles in 2014. Frederic J. Brown/AFP/Getty Images hide caption
If you haven't had at least seven hours of sleep in the last 24, you probably shouldn't be behind the wheel, traffic safety data suggests. Katja Kircher/Maskot/Getty Images hide caption
In 23 states and Washington, D.C., the nighttime driving restriction for unsupervised teens begins at midnight or later. Getty Images hide caption
Although Uber has repeatedly extolled drunken-driving reduction as a benefit of its service, a new study of data from across the U.S. finds ride-sharing apps have had no effect on alcohol-related traffic fatalities. Eric Risberg/AP hide caption
Efforts aimed at teen drinking and driving help reduce deaths, but so do broader alcohol control efforts. Roy Morsch/Corbis RM Stills/Getty Images hide caption
The psychoactive ingredient in marijuana is a fat-soluble compound called THC. iStockphoto hide caption
Teens are drinking and driving less, but it's still a huge public health issue. Alejandro Rivera/Getty Images hide caption
Police officers check drivers at a sobriety checkpoint in Escondido, Calif. Lenny Ignelzi/AP hide caption
The BACTrack Vio keychain breathalyzer and app on the iPhone at NPR headquarters in Washington, D.C. A public health researcher says tools like this could help people make better decisions about alcohol use. Meredith Rizzo/NPR hide caption
I'm not really texting. I'm checking my homework assignments. iStockphoto hide caption
