[NobleFree]

“In 2016, of the 115 drivers in fatal wrecks who tested positive for marijuana use, 71 were found to have Delta-9 tetrahydrocannabinol, or THC, the psychoactive ingredient in marijuana, in their blood, indicating use within hours, according to state data. “

'Presumably, these figures came from the "National Highway Traffic Safety Administration, Fatality Analysis Reporting System (FARS) 2006-2011 and Colorado Department of Transportation 2012-2017," cited in a previous graphic.

'But CDOT's digits, which we shared last month, are completely different. They show that the number of fatalities involving a driver who tested positive for 5 nanograms or more of Delta-9 THC, the highly controversial state limit for cannabis intoxication, actually dropped from 2016 (52, or 13 percent of total drivers involved in fatalities who were drug tested) to 2017 (35, or 8 percent.)

'[...] plenty of other studies contradict the Rocky Mountain High Intensity Drug Trafficking Area's findings, too [...]'

- https://www.westword.com/news/why-law-enforcement-groups-report-about-marijuana-horrors-is-being-ignored-10834610

[TexasGator]

CDOT (your link)

“Marijuana and driving is still a huge problem in Colorado,” Cole maintains. “About 10 percent of our fatalities involve a driver who was at or above the legal limit for active THC, and we need to get that number way down. Any fatality above zero is one fatality too many.”

[TexasGator]

“number of fatalities involving a driver who tested positive for 5 nanograms or more of Delta-9 THC, “

Maybe the limit is too high?