Cannabis and Driving Laws
Learn about the laws and regulations surrounding cannabis use and driving in the United States.
Driving under the influence of cannabis is a serious offense in the United States. State laws regarding cannabis and driving vary significantly, reflecting the evolving landscape of cannabis legality and public safety concerns.
California: Impaired driving is illegal regardless of THC levels.
Colorado: Per se laws set a THC limit of 5 ng/mL in blood for drivers.
Marijuana is legal in Washington, but it is illegal to drive with any amount of active THC in your system.
Violating cannabis and driving laws can lead to fines, license suspension, and in some cases, jail time.