Unlike with alcohol, there is no universal standard for THC levels while driving. But that doesn't mean it's safe.

The driver of a semi-truck that police believe killed five people when the vehicle smashed into nearly stopped traffic on Interstate 35 last week was allegedly under the influence of drugs, according ...

When drivers are getting pulled over for drunk driving in Nebraska, their average BAC is .167%. It's not just alcohol; Nebraska also has a high rate of drivers under the influence of drugs. SYSTEM.

A 59-year-old truck driver from New Jersey was under the influence of drugs during a crash on the New York State Thruway last week that killed the driver of another tractor-trailer, authorities said.