Transportation Research Circular E-C250: Drug-Impaired Driving: Research Needs

The emergence of drug-impaired driving, notably marijuana-impaired driving, is a priority concern among road-safety stakeholders. In particular, the availability and potency of marijuana has increased, and the legalization of different forms of marijuana has occurred in many jurisdictions around the world.

Of equal concern, in comparison to alcohol, much less is known about marijuana and driving in terms of the prevalence of the problem, the consequences on driving performance, and strategies to manage marijuana-impaired drivers.

For these and other reasons, substantial investment in research about marijuana-impaired driving is essential to inform solutions. Transportation Research Circular E-C250: Drug-Impaired Driving: Research Needs describes eight priority research topics that span several disciplines and identifies the top research needs in each area that are crucial to increase the understanding of this issue.