TUCSON, Ariz. — A ruling by one of the state's highest courts sets a "high" bar when it comes to suspending licenses for marijuana DUIs. The ruling by the Arizona Court of Appeals establishes a new ...

DUI enforcement is ramping up across Colorado as law enforcement agencies focus on the dangers of driving under the influence ...

A new paper issued by the United States National Highway Traffic Safety Administration (NHTSA) advises against the imposition of per se impairment levels for THC. Per se DUI laws, which exist ...

A bill filed for this year’s state legislative session would create a legal definition of driving under the influence of marijuana. House Bill 34 was filed by Rep. Mitch Whitaker, a Fleming-Neon ...

San Diego police have been using the handheld SoToxa device during traffic stops since October, testing a driver's saliva to ...

DuPage County State’s Attorney Robert Berlin is dismissing charges in 19 marijuana-impaired driving cases because laboratories incorrectly detected or measured THC in defendants’ bodies. That includes ...