Comptroller General study on effects of marijuana legalization on traffic safety

(a) In general The Comptroller General of the United States shall conduct a study on the effects of marijuana legalization on traffic safety. (b) Inclusions The study conducted under subsection (a) shall include a detailed assessment of— (1) traffic crashes, fatalities, and injuries in States that have legalized marijuana use, including whether States are able to accurately evaluate marijuana impairment in those incidents; (2) actions taken by the States referred to in paragraph (1) to address marijuana-impaired driving, including any challenges faced in addressing marijuana-impaired driving; (3) testing standards used by the States referred to in paragraph (1) to evaluate marijuana impairment in traffic crashes, fatalities, and injuries, including any scientific methods used to determine impairment and analyze data; and (4) Federal initiatives aiming to assist States that have legalized marijuana with traffic safety, including recommendations for policies and programs to be carried out by the National Highway Traffic Safety Administration. (c) Report Not later than 1 year after the date of enactment of this Act, the Comptroller General of the United States shall submit to the appropriate committees of Congress a report on the results of the study conducted under subsection (a).