Previous Presentations

Educating Enforcement and Industry - Captain Thomas Foster, Washington State Patrol, Commercial Division

This presentation focuses on the training and education for both enforcement and industry that has been necessary to address challenges posed by marijuana legalization in Washington State. 


Marijuana Impairment Impacts on Roadway Safety - Rebecca M. Brewster, President and COO, American Transportation Research Institute

This presentation identifies the important measures for addressing marijuana-impaired driving, including workplace screening programs conducted by industry, roadside detection by enforcement, and judicial training.


Traffic Safety Culture and DUIC: Exploring Commercial Drivers - Nicholas Ward, Director, Center for Health and Safety Culture

This presentation looks at the results of a driver survey focused on cannabis use behaviors and beliefs. When drivers' are willing to get behind a wheel while impaired by marijuana because they believe they can still drive safely, what can traffic safety stakeholders do to effectively intervene and shift these risk-prone attitudes to ones that center safety?


Decriminalization of Marijuana and Potential Impact on CMV Drivers - Darrin T. Grondel, Director, Washington Traffic Safety Commission

This presentation covers the signs, symptoms and risks of marijuana impairment, specific challenges in regulating and enforcing CMV driver impairment, and analysis of crash data in Washington State. Furthermore, this presentation includes strategies, including roadside enforcement, data collection and education, for combating impaired driving.

Marijuana Decriminalization 

While marijuana decriminalization has profound implications for all highway safety, it is of particular concern within the realm of professional drivers, as truck and bus crashes are often far deadlier than passenger vehicle crashes. As a result, the entire spectrum of transportation safety stakeholders have been tasked to manage education and enforcement in unison.

Important: While marijuana has been legalized and/or decriminalized in some states, the Department of Transportation still forbids the use of marijuana by all commercial drivers (including those who have received a medical marijuana prescription). Learn more here.


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    Resources for Law Enforcement



    Resources for Industry

    Additional news articles, research, editorials, presentations, and webinars are available at the Commercial Vehicle Safety Center at the Upper Great Plains Transportation Institute, North Dakota State University as well as the Southern Service Center Commerical Motor Vehicle Technical Assistance Center (SSC-TAC) at the Center for Advanced Public Safety at the University of Alabama.

    Important Information

    FMCSA Drug & Alcohol Clearinghouse

    The American Trucking Association's Controlled Substances and Driver Health & Wellness Working Groups' Recommendations on Marijuana Legalization

    DOT Office of Drug and Alcohol Policy and Compliance Notice: Differentiation Between Marijuana and CBD Products

    The American Transportation Research Institute's Marijuana Legalization and Impaired Driving: Solutions for Protecting our Roadways

    Governors Highway Safety Association's Drug Impaired Driving: A Guide for States

    Colorado Department of Transportation's Decriminalization of Marijuana and Its Impact on Traffic Safety: Colorado Perspective - Commercial Vehicle Safety & CDL Compliance

    In the News

    Police Chief Magazine - Combating Impaired Big-Rig Drivers on the Roads: Utilizing Drug Recognition Experts in Commercial Motor Vehicle Operations

    FMCSA Raises Random Controlled Substance Testing Rate for CMV-CDL Drivers

    DOT "Recreational Marijuana" Notice

    DOT "Medical Marijuana" Notice

    CDC National Estimates of Marijuana Use and Related Indicators - National Survey on Drug Use and Health, United States, 2002-2014


    Preventative Medicine: Perceived Safety of Cannabis Intoxication Predicts Frequency of Driving While Intoxicated

    AAA Foundation: Cannabis Use Among Drivers in Fatal Crashes in Washington State Before and After Legalization

    Traffic Injury Prevention: Developing a theoretical foundation to change road user behavior and improve traffic safety: Driving under the influence of cannabis (DUIC)


    Increasing Marijuana Legalization and Use Raises Concerns for Trucking

    FMCSA Raises Random Drug Test Rate as Start of Clearinghouse Nears

    Transportation Leaders to Legislature: Hit the Brakes on Pot Legalization

    Tackling Legal Marijuana, HOS, Infrastructure Among ATA's Priorities

    New ATA Policy Addresses Marijuana Challenges in Trucking

    How to Deter Drivers from Using Marijuana (and Other Drugs)