Scientific Reports
March 10, 2026
Bruna Brands, Adam Zaweel, Madison Wright et al.
Given the increasing availability of high-potency Δ9-tetrahydrocannabinol (Δ9-THC) products, understanding potency-related effects of Δ9-THC on driving performance is an important public safety issue. This randomized, double-blind, placebo-controlled, within-subjects trial examined the effects of smoked cannabis with varying Δ9-THC concentrations on simulated driving. Adults aged 19–45 who...
Traffic injury prevention
2022
Thomas S Burt, Timothy L Brown, Rose Schmitt et al.
The objective of this analysis was to determine the generalizability of the relationship between different samples of a driver's perceived state after cannabis use and related performance while operating a motor vehicle. Data were collected from 52 subjects in a study examining the effects of cannabis on driving performance. Data were analyzed using the SAS GLM Select procedure, using stepwise...
Traffic injury prevention
2021
Thomas S Burt, Timothy L Brown, Rose Schmitt et al.
Reports indicate that cannabis users will adapt their driving to compensate for the perceived drug effects of cannabis. This analysis examined the relationship between driver perceptions of their state contrasted with objective measures of their performance while operating a motor vehicle. Data was collected from ten subjects in a study examining the effects of cannabis on driving performance....
Frontiers in Neuroscience
2021
Christian D Richard, Jared R Poole, Marissa McConnell et al.
The trend toward cannabis legalization in the United States over the past two decades has unsurprisingly been accompanied by an increase in the number of cannabis users and use patterns that potentially pose wider risks to the public like driving under the influence. As such, it is becoming increasingly important to develop methods to accurately quantify cannabis intoxication and its associated...
Journal of Applied Toxicology
November 2016
Rebecca L Hartman, Timothy L Brown, Gary Milavetz et al.
Although evidence suggests cannabis impairs driving, its driving-performance effects are not fully characterized. We aimed to establish cannabis' effects on driving longitudinal control (with and without alcohol, drivers' most common drug combination) relative to psychoactive ∆(9) -tetrahydrocannabinol (THC) blood concentrations. Current occasional (≥1×/last 3 months, ≤3 days per week) cannabis...