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Topic: Driving

Marijuana Drug Testing

Study: Detection of THC in Blood, Exhaled Breath Is Not Correlated with Impairment

Investigators concluded, “The use of per se legal limits for delta-9-THC is not scientifically justifiable at the present time.”

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Earl Blumenauer and Pete Buttigieg

Lawmaker Calls on Transportation Department to Amend “Outdated” Cannabis Testing Requirements

“Outmoded and unfair federal drug policies are out of step with reality and directly contribute to the trucking shortage crisis,” wrote Rep. Blumenauer.

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a black car key rests next to a green marijuana bud

Study: Marijuana Legalization Laws Are Not Associated with Lax Attitudes Toward Drugged Driving

NORML’s Deputy Director said, “These findings ought to reassure those who feared that legalization might inadvertently be associated with relaxed attitudes toward driving under the influence.”

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Marijuana and Driving

Review: Influence of Cannabis on Driving Performance Less Significant Than Alcohol

Authors concluded, “There are no instances where the average effect of cannabis is equal to or greater than the driving performance decrements associated with BAC concentration ranging from 0.04 to 0.06 percent.”

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Marijuana and Driving

Study: THC Levels in Blood Not Linked with Changes in Simulated Driving Performance

Researchers concluded, “The lack of relationship between blood THC concentration and driving performance raises questions about the validity of per se laws.”

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Marijuana Legalization

Analysis: Changes in Marijuana Laws Not Associated with Increased Traffic Fatalities

Investigators concluded, “As of 2019, we find [that] liberalization has been associated with lower traffic fatalities, not higher.”

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Driving Performance

Study: Inhalation of CBD-Dominant Cannabis Does Not Negatively Influence Fitness to Drive

Researchers observed “no symptoms of impairment” and “no significant impact on driving ability” in study subjects who inhaled CBD-dominant cigarettes.

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Marijuana and Driving

Analysis: THC Concentrations in Blood, Oral Fluid Are Not Predictive of Impairment of Performance

Researchers affirmed, “Blood THC concentrations and oral fluid THC concentrations … are relatively poor indicators of cannabis-induced impairment.”

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