By CBS4 Political Specialist Shaun Boyd

DENVER (CBS4)– For the first time, there’s hard evidence that more and more people are driving high in Colorado. And, the sobering statistics could impact the growing marijuana industry in our state.

(credit: CBS)

While police have tracked DUIs for years, they’ve lumped them altogether, so there’s no telling which drugs are the biggest problems.

READ MORE: Denver Tied 126-Year-Old Record High Saturday, Lands In Top 5 For 90 Degree Days

Ed Wood helped changed that with a law that requires DUI data specify the drug involved. Wood’s son Brian was killed by two women sharing the wheel of car while high. Devastated, he dedicated his life to getting marijuana impaired drivers off the road.

“There’s a large gap between actual and perceived risk imposed by THC-impaired drivers,” said Wood.

While alcohol is still the drug of choice, the Colorado Bureau of Investigation says 47% of drivers are testing positive for marijuana, followed by amphetamines and cocaine. The Colorado State Patrol says DUI arrests involving marijuana are up 48% in the last year.

(credit: CBS)

“We need to do for drug impairment what we’ve already done for alcohol impairment,” said Wood.

READ MORE: Police, Firefighters, Rescue Teams Continue Search For Diana Brown, Missing Flash Floods Ripped Through Poudre Canyon

That starts, he says, with changing the Department of Motor Vehicle Driver Handbook which states, “It is unclear whether cannabis use increases the risk of car crashes.”

According to the Colorado Department of Transportation, the number of marijuana impaired drivers involved in deadly crashes has risen every year between 2017 and 2019, the most recent years for which data is available.

Wood knows that any change won’t be easy. He’s been at it 10 years.

(credit: CBS)

“There are times I give up and say, ‘I’m not doing this anymore.’”

MORE NEWS: Woman Killed While Crossing Broadway, Search Continues For Hit-And-Run Suspect Driver

Then, he thinks about the daughter his son never got to meet, “She’s the light of my life… so, I get back in and keep on trying.”

Shaun Boyd