Analysis of drug-related motor vehicle crash data in 2023 examined how cannabis legalization policies relate to drug-positive crash rates across US communities.
Traffic safety researchers, policymakers evaluating cannabis legalization impacts, law enforcement, and public health professionals.
What the researchers found
The study assessed drug use prevalence among non-fatally injured crash victims and evaluated whether state cannabis legalization policies were associated with differences in drug-related crash rates.
Why it matters
Understanding whether cannabis legalization affects crash rates is essential for evidence-based traffic safety policy. This study provides 2023 data as more states have legalized.
The numbers in context
2023 data on drug use among non-fatally injured crash victims across US states with varying cannabis legal frameworks.
How the study worked
Cross-sectional analysis of drug use among individuals injured in non-fatal motor vehicle crashes in 2023, examining associations with state-level cannabis and driving-related drug policies.
What this study cannot tell us
Cross-sectional design cannot establish causation. Drug presence doesn't equal impairment at time of crash. Testing protocols vary across jurisdictions. Non-fatal crashes only.
How to read the evidence
Cross-sectional analysis of real-world crash data — provides useful associations but cannot establish causal links between policies and outcomes.
When this study was published
Uses 2023 data, making it among the most current analyses of cannabis policy impacts on traffic safety.
The bigger picture
The relationship between cannabis legalization and traffic safety remains hotly debated. Real-world crash data helps move beyond speculation to evidence-based policy discussions.
Questions still open
- Do specific aspects of cannabis regulation (potency limits, packaging requirements, DUI laws) differentially affect crash rates? How do we best measure cannabis impairment at crash scenes?
Common questions
Does legalizing cannabis cause more car crashes?
How do they test for drugs after a crash?
Read the original research
Drug use among individuals injured in non-fatal motor vehicle crashes and related policies in 2023.
Traffic injury prevention, 26(7), 760-768
Citation
Won, Nae Y; Gurka, Kelly K; Striley, Catherine W; Nixon, Sara Jo; Cottler, Linda B. (2025). Drug use among individuals injured in non-fatal motor vehicle crashes and related policies in 2023.. Traffic injury prevention, 26(7), 760-768. https://doi.org/10.1080/15389588.2025.2456952
Explore the wider topic
- Cannabis Law and Your Rights: A Complete 2026 Guide
- How Much Weed Can You Legally Possess? A State-by-State Guide
- Cannabis and Gun Ownership: The Federal Conflict Nobody Talks About
- Flying with Weed: TSA Rules, State Lines, and What Happens If You Get Caught
- Crossing State Lines with Weed: Legal in One State, Felony in the Next
- Cannabis and Immigration Status: What Green Card Holders Need to Know