DENVER (WKOW) -- In last week's election residents in Colorado and Washington approved the legalization of marijuana. Now officials in both states work to establish new driving laws to ensure users are not driving under the influence.
Testing for marijuana use while driving isn't as easy as measuring a driver's blood alcohol level.
Marijuana stays in the system long after its side effects wear off. And there is no widely available test to determine whether someone is driving while impaired.
Lawmakers in Colorado, which also allows medical marijuana, have failed to set a driving limit for THC -- the psychoactive chemical in marijuana. They say they'll try again next year.
Washington's marijuana law sets a driving-while-intoxicated limit for THC. But that standard already is being criticized as arbitrary.
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