Most Frequent Cannabis Users Waited the Least Time Before Driving
Among 424 Connecticut cannabis users, more frequent users reported less driving impairment and shorter wait times before driving, with a plurality not waiting at all, and perceived impairment did not predict waiting behavior.
Quick Facts
What This Study Found
Cannabis use frequency predicted both lower self-reported driving impairment and shorter wait time before driving. A plurality of participants reported not waiting at all before driving after cannabis use. Importantly, perceiving that cannabis impaired driving did not predict longer wait times, suggesting knowledge of impairment does not translate to safer behavior.
Key Numbers
424 cannabis users in Connecticut; more frequent users reported less impairment; more frequent users waited less time; plurality reported not waiting at all; perceived impairment did not predict wait time
How They Did This
Cross-sectional survey of 424 cannabis users over age 18 in Connecticut. Purposive sampling used to recruit cannabis users. Measured cannabis use frequency, self-reported impact on driving ability, and time waited before driving after use.
Why This Research Matters
The disconnect between perceived impairment and driving behavior is concerning. Even people who acknowledge cannabis affects their driving are not waiting longer, suggesting that awareness campaigns alone may not be enough to change behavior.
The Bigger Picture
This study challenges the assumption that educating people about cannabis impairment will lead to safer driving behavior. Policy approaches may need to focus on enforcement and objective impairment measures rather than relying on user self-regulation.
What This Study Doesn't Tell Us
Self-reported data may not reflect actual driving behavior. Connecticut-specific sample may not generalize. Cross-sectional design cannot establish causation. Frequent users may have developed tolerance, making their self-reports of lower impairment partially accurate.
Questions This Raises
- ?Why does perceived impairment not change driving behavior?
- ?Would objective impairment feedback (like an app test) change wait times?
- ?Does tolerance in frequent users actually reduce driving impairment?
Trust & Context
- Key Stat:
- Knowledge of impairment did not increase wait time
- Evidence Grade:
- Reasonably sized survey with important findings about behavior-perception gap, but self-reported data and single-state sample
- Study Age:
- 2023 study
- Original Title:
- Self-reported impacts of recreational and medicinal cannabis use on driving ability and amount of wait time before driving.
- Published In:
- Traffic injury prevention, 24(3), 237-241 (2023)
- Authors:
- Auguste, M E, Zambrano, V C
- Database ID:
- RTHC-04382
Evidence Hierarchy
A snapshot of a population at one point in time.
What do these levels mean? →Frequently Asked Questions
How long do people wait to drive after using cannabis?
In this study, a plurality of cannabis users reported not waiting at all. More frequent users waited the least, and believing cannabis impaired driving did not lead to longer wait times.
Do frequent cannabis users actually drive better than occasional users after use?
Frequent users reported less impairment, which could partly reflect tolerance. However, this study only measured self-reported impairment, not actual driving performance.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-04382APA
Auguste, M E; Zambrano, V C. (2023). Self-reported impacts of recreational and medicinal cannabis use on driving ability and amount of wait time before driving.. Traffic injury prevention, 24(3), 237-241. https://doi.org/10.1080/15389588.2023.2172679
MLA
Auguste, M E, et al. "Self-reported impacts of recreational and medicinal cannabis use on driving ability and amount of wait time before driving.." Traffic injury prevention, 2023. https://doi.org/10.1080/15389588.2023.2172679
RethinkTHC
RethinkTHC Research Database. "Self-reported impacts of recreational and medicinal cannabis..." RTHC-04382. Retrieved from https://rethinkthc.com/research/auguste-2023-selfreported-impacts-of-recreational
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.