drunk driving

An analysis of car accidents found that drivers who slept only five or six hours in the previous 24 had nearly twice the accident rate of drivers who slept a full seven hours or more.

Nighttime driving restrictions on teens may save lives, a study finds, but should probably be shifted to include late evening. A third of all fatal crashes with teen drivers happen after dark.

A new study of data from 100 U.S. cities finds access to apps for ride-sharing services has not led to a decrease in alcohol-related traffic fatalities.

Raising the cost of alcohol with taxes makes it less likely that teenagers will die in a drunk-driving accident, a study finds. Some teen-specific policies like graduated drivers licenses help, too.

Blood alcohol levels match well with a person's impairment. But the THC in marijuana doesn't move around the body the same way, so blood tests can miss people who are stoned.

It's a good-news trend in public health: Teens and young adults are less likely to drive while impaired than they were 12 years ago. But the study didn't ask specifically about marijuana.

The Olympic gold medal winner gets no jail time for second conviction for drunk driving. He'll be able to train for Rio with his 18-month supervised probation.