From your link:
“marijuana can be detected in the blood for one week after consumption, perhaps leading chronic consumers to be wrongly arrested, critics of the law assert.
“A separate study — also based on FARS data — found that in states where medical marijuana was approved, traffic fatalities decrease by as much as 11 percent during the first year after legalization. Written by researchers at the University of Colorado, Oregon and Montana State University, the paper was published in 2013 in the Journal of Law & Economics.
“Those authors theorized pot, for some, becomes a substitute for alcohol. They cited a recent, 13-percent drop in drunk-driving deaths in states where medical marijuana is legal.”
“Written by researchers at the University of Colorado, Oregon and Montana State University, the paper was published in 2013 in the Journal of Law & Economics.”
LOL! Wondering what they are saying now since traffic deaths up significantly in CO since legalizing marijuana?
Increasingly potent levels of marijuana were found in positive-testing drivers who died in crashes in Front Range counties, according to coroner data since 2013 compiled by The Denver Post. Nearly a dozen in 2016 had levels five times the amount allowed by law, and one was at 22 times the limit. Levels were not as elevated in earlier years.
Last year, all of the drivers who survived and tested positive for marijuana use had the drug at levels that indicated use within a few hours of being tested, according to the Colorado Department of Transportation, which compiles information for the National Highway Traffic Safety Administration’s Fatality Analysis Reporting System.
https://www.denverpost.com/2017/08/25/colorado-marijuana-traffic-fatalities/