COMING UP: Driverless Car, Tonight on CBS4 at 10 (Watch Preview)

University of Colorado Toxicology

Too High To Drive? CBS4 Puts Stoned Drivers To The TestNow that marijuana has been legalized, how high is too high to drive? In an effort to find out, CBS4 conducted a test with the help of a leading driving instruction company, a respected lab and marijuana businesses to provide the volunteers.
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