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Cannabis and Driving.

Godfrey D Pearlson1,2,3, Michael C Stevens1,2, Deepak Cyril D'Souza2

  • 1Department of Psychiatry, Olin Neuropsychiatry Research Center, Institute of Living, Hartford Healthcare Corporation, Hartford, CT, United States.

Frontiers in Psychiatry
|October 11, 2021
PubMed
Summary
This summary is machine-generated.

Legalizing cannabis increases driving under the influence. Current policies on detecting cannabis impairment and using blood THC levels lag behind scientific understanding, highlighting critical research gaps.

Keywords:
THCcannabinoidscannabis usedriving impairmentmotor vehicle drivingpublic healthroadside testing

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Area of Science:

  • Public Health
  • Forensic Science
  • Transportation Safety

Background:

  • Cannabis legalization is rising, leading to increased driving under the influence (DUI) incidents.
  • A significant gap exists between current public policy and scientific knowledge regarding cannabis impairment.

Purpose of the Study:

  • To review current scientific information on cannabis and motor vehicle accidents.
  • To examine cannabis impairment of driving behaviors, their time courses, and relationship to dose and blood THC levels.
  • To compare cannabis and alcohol-impaired driving and address alcohol-cannabis combinations and per-se limits.

Main Methods:

  • Literature review of scientific studies on cannabis and driving.
  • Analysis of driving behavior patterns under cannabis influence.
  • Comparison of cannabis impairment with alcohol impairment.

Main Results:

  • Cannabis use is linked to increased motor vehicle accidents.
  • Driving impairment patterns, time courses, and dose-THC relationships are complex.
  • Research gaps exist in detection methods and the scientific basis for per-se limits.

Conclusions:

  • Public policy on cannabis-impaired driving needs to be better aligned with scientific evidence.
  • Further research is crucial to address knowledge gaps in cannabis detection and impairment assessment.
  • Recommendations are provided to guide future research and policy development.