As marijuana use in the United States is on the rise, a growing number of drivers are getting behind the wheel high, while regulations and law enforcement agencies scramble to keep up with the danger.

Virginia is gearing up for a legal retail cannabis market. Is it ready to handle drugged driving?

PIERCE COUNTY, Wash. — A 46-year-old woman in Pierce County has been arrested multiple times for driving under the influence (DUI) in a span of just two weeks, raising serious concerns about public ...