NHTSA

Current sort has key articles at the top. Click on "Article Date" to sort by date, click on specific "tag" to view all articles in that category.

Title
Cannabis / Marijuana ( Δ 9 -Tetrahydrocannabinol, THC)
02/16/2000

Decreased car handling performance, increased reaction times, impaired time and distance estimation, inability to maintain headway, lateral travel, subjective sleepiness, motor incoordination, and impaired sustained vigilance have all been reported. Some drivers may actually be able to improve performance for brief periods by overcompensating for self-perceived impairment. The greater the demands placed on the driver, however, the more critical the likely impairment. Marijuana may particularly impair monotonous and prolonged driving. Decision times to evaluate situations and determine appropriate responses increase. Mixing alcohol and marijuana may dramatically produce effects greater than either drug on its own.


NHTSA, THC, Pharmacokinetics, driving
Subscribe to NHTSA