Drug impaired driving is a problem on California highways. This includes drivers under the influence of prescribed medications, illicit drugs, over-the-counter medications or marijuana. And just like drunk driving, driving under the influence of drugs is illegal.
It is also dangerous and poses a threat to the driver, vehicle passengers, and other users on the road. Nearly one in four weekend 
drivers tested positive for at least one drug that could impair their ability to drive safely according to the National Highway Traffic Safety Administration (NHTSA) 2013/14 National Roadside Survey of Alcohol and Drug Use By Drivers.
On Wednesday, December 27, 2017, the California Highway Patrol and the California Office of Traffic Safety joined other state and local law enforcement officials to launch a campaign to address this problem and reinforce the message that "DUI Doesn't Mean Just Booze" and remind drivers: If you are impaired by drugs and thinking about driving, designate a driver. This is especially critical as California begins licensing commercial nonmedical cannabis sales on January 1, 2018.
This campaign will run from December 27, 2017 through January 2018. For more information about drug impaired driving, please visit the drugged driving site from the California Office of Traffic Safety.