DENVER (AP) -- Marijuana blood-level driving limits could finally be coming to Colorado.
Colorado lawmakers have failed three times to agree to a driving blood limit standard for marijuana. The proposal comes before the Legislature for a fourth time Thursday, when the proposal is heard in the House Judiciary Committee.
The proposal would set a marijuana equivalent to blood-alcohol limits. But pot activists who have successfully derailed earlier driving-high bills insist the fight isn't over.
Drugged driving is already illegal. But the bill would set a standard of 5 nanograms per milliliter of blood for the psychoactive ingredient in marijuana.
This year's version would give defendants the opportunity to show they were unimpaired though they exceeded the blood limit.
Washington state already has a 5 nanogram driving limit.