Cannabis Consumption and Driving Impairment Assessment on a Closed Course

Description

In a true experiment, roughly 300 volunteer participants will smoke active cannabis, a corresponding placebo, or no substance at all (control). Next, participants will complete a drive test and then be observed by actual California Highway Patrol (CHP) officers who will attempt to classify participants as impaired or unimpaired. CHP Officers will evaluate participants in the context of driving (i.e., while following participants in an actual patrol car), as part of a roadside behavioral assessment (i.e., the Advanced Roadside Impaired Driving Enforcement, or ARIDE, battery, which includes Standardized Field Sobriety Tests, or SFSTs), and as part of a Drug Recognition Expert (DRE) evaluation conducted indoors.

Conditions

Cannabis Smoking, Driving Impaired

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Study Overview

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Study Details

Study overview

In a true experiment, roughly 300 volunteer participants will smoke active cannabis, a corresponding placebo, or no substance at all (control). Next, participants will complete a drive test and then be observed by actual California Highway Patrol (CHP) officers who will attempt to classify participants as impaired or unimpaired. CHP Officers will evaluate participants in the context of driving (i.e., while following participants in an actual patrol car), as part of a roadside behavioral assessment (i.e., the Advanced Roadside Impaired Driving Enforcement, or ARIDE, battery, which includes Standardized Field Sobriety Tests, or SFSTs), and as part of a Drug Recognition Expert (DRE) evaluation conducted indoors.

Cannabis Consumption and Driving Impairment Assessment on a Closed Course

Cannabis Consumption and Driving Impairment Assessment on a Closed Course

Condition
Cannabis Smoking
Intervention / Treatment

-

Contacts and Locations

Sacramento

California Department of Motor Vehicles Headquarters, Sacramento, California, United States, 95818-2606

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

For general information about clinical research, read Learn About Studies.

Eligibility Criteria

  • * Possessing a valid California driver's license
  • * Cannabis use in the past six months
  • * Willing and able to abstain from alcohol, cannabis, and other recreational drugs for 24 hours prior to scheduled participation
  • * Willing and able to avoid driving and operating heavy machinery for at least four hours after participation
  • * Residence within approximately 15 miles of the study site
  • * Possessing the capacity to provide informed consent
  • * Completion of a roadside sobriety test during the previous 12 months
  • * Physical or psychological conditions that can be exacerbated by cannabis use, or for which cannabis use is contraindicated
  • * Potential presence of Cannabis Use Disorder as assessed by a modified version of the Cannabis Use Disorder Identification Test
  • * Potential presence of Substance Use Disorder as assessed by a modified version of the Drug Abuse Screening Test
  • * Pregnancy or breastfeeding reported
  • * Unwillingness to be transported by taxi
  • * Having been convicted of Driving Under the Influence (DUI) within five years prior to scheduled participation
  • * Parole or probation status
  • * One or more felony convictions on record involving aggressive or dangerous criminal activity
  • * Any of the following at the time of the experimental session: breath alcohol content of .01% or greater; positive pregnancy test; cannabis consumption considered unsafe following medical checkup by the study nurse; or driving test behavior considered hazardous by the driving examiner

Ages Eligible for Study

21 Years to 55 Years

Sexes Eligible for Study

ALL

Accepts Healthy Volunteers

Yes

Collaborators and Investigators

Bayliss J. Camp, PhD,

Bayliss J Camp, PhD, PRINCIPAL_INVESTIGATOR, California Department of Motor Vehicles

Study Record Dates

2024-12-31