A.P.: NTSB chief says people underestimate marijuana’s impact on drivers, after six person fatal crash.

CDC.gov: “Impaired Driving: Get the Facts.”

Clinical Chemistry Journal: study (2013) shows “substantial driving impairment” by drivers who use marijuana.

Colorado Division of Criminal Justice: report (2019) shows that vehicular fatalities involving DUI by marijuana delta-9 THC) increased 140% between 2013 and 2019.

FTS (Foundation for Traffic Safety): new study (March 2025) shows that as many as 85% of marijuana users are driving same day of using.

ITSMR: the 2019 National Survey on Drug Use and Health study showed > 600K residents of NY reported driving under the influence of cannabis.

JAMA: emergency room visits due to cannabis related vehicle accidents increase by 475%.

The Mandarin (Australia): driving under the influence of marijuana: explanations and research data links.

NHTSA: understanding how marijuana affects driving.

NPR: THC breathalyzers? States are racing to find a good tool as driving while high is increasing.

NTSB.gov: driving and marijuana use.

NYT: as marijuana use grows, effect on road safety remains a blind spot.

Orlando Sentinel: will pot legalization (Amendment 3 in Nov. 2024) spark a stoned-driving epidemic in Florida?

WSJ: “More people are driving on marijuana. Law enforcement is racing to learn how to detect DUI.”