One policeman and one driver:

Both need more information about 

marijuana-impaired driving.

CMMI offers some answers.



Every day some 28 fatalities will be caused by impaired driving:

  • As the number of states approve adult-use cannabis consumption, impairment goes up
  • 40% of traffic crashes are alcohol-related; but 9-12% of crashes are cannabis-related
  • Current law enforcement field detection of MJ relies on blood-alcohol measurements
  • CMMI is dedicated to connecting the gap between theory and reality-- to Save Lives!​

Cannabis impairment is most critical in the first 2-3 hours.

Starting Fall, 2022, we invite your group to join us in south Denver's unique MJ Impairment Simulator and Human Lab for Safe Subject Study on Cannabis Behavioral and BioLogical Impacts led by qualified Denver university specialists.

Understanding the interplay between THC and alcohol, and THC and other substances offers new insight into realizing key connections. 

CMMI provides resources for


Courts & Evidence

• Law Enforcement 

• Prosecuting & Defending Attorneys

• Traffic Safety Experts 

• State Regulators & Lawmakers

• University Researchers

• Forensic Toxocoligists

• Behavior Experts

• Cannabis Advocates

• MedMJ Patients

• Press & Media 

• Global DataBases


January, 2022

Traffic Study Release

Colo Div of Criminal Justice (Office of Research & Statistics

Full Text to In-depth MJ Driving Study


The Major 55 Studies and Journal Articles 

on Cannabis Impairment-- 2016 to present

Arkel (2019) Per Se Failings

Arkel/Lintzess (2021)

Ashbridge (2012) "Acute cannabis consumption and motor vehicle collision risk: systematic review of observational studies and meta= analysis" doi.10.1136/bmj.e536

Azagba

Berg (2018)

Bidwell

Brady

Brands

Brown

Burggren

Burt

Cavazos-Rehn

Cole

Compton

Couper (2014)

Covens

Desrosiers (2015)

Doroudgar(2018)

Dubois

Gelmi

Ginsberg

Gjerde (2016)

Hartman / Brown

Hartman/ Huestis

Himes (2013)

Hollis

Huestis (1992)

Karoly

Lao (2020)

Lynch (2020)

Liquoris

McCartney, Danielle (2021)

Pearlson (2021) "Cannabis and Driving" doi.103389/fpsyt.2021.689444

Rameker/Berghaus (2004)

Ramekers (2014)

Ramaekers (2000)

Robbe

Rogeberg

Rudisill (2014)

Scott

Stagner

Thijssen

Weinstein

Wendell(2021)

Whitehill (2018)

https://www.frontiersin.org/articles/10.3389/fpsyt.2021.596601/full

https://www.nhtsa.gov/drug-impaired-driving/understanding-how-marijuana-affects-driving

CENTER FOR MANAGING MARIJUNA IMPAIRMENT 

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Can we save lives? Can we set a global standard for impairment?

Will you help us lead the charge for fair and reliable THC 

impairment testing and analysis? 720-532-7364

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