What if you had a test that showed that you had alcohol in your system from drinking 3 days ago and you could get a DUI!!! Well thats what could possibly happen with Denver giving the greenlight on their Marijuana DUI standard set for 5 nanograms which could potentially show a positive test result if you had smoked the day prior which would result in a DUI and a whole bunch of more trouble after that. What if you had a test that showed that you had alcohol in your system from drinking 3 days ago and you could get a DUI!!! Well thats what could possibly happen with Denver giving the greenlight on their Marijuana DUI standard set for 5 nanograms which could potentially show a positive test result if you had smoked the day prior which would result in a DUI and a whole bunch of more trouble after that.

DENVER -- The hazy debate over driving while high is back before Colorado lawmakers, as a Senate committee voted Monday to endorse a proposal setting a scientific standard for determining whether drivers are impaired by marijuana.

The bill says drivers would be considered impaired if they test positive for 5 nanograms or more of THC, the psychoactive ingredient in marijuana, per milliliter of blood. There's disagreement over whether a blood THC test is a fair gauge of whether a driver is impaired, but a Senate panel voted 4-1 to forward the measure to the full chamber.

"The privilege of smoking marijuana should stop at the vehicle door," said the bill's sponsor, Republican Sen. Steve King, of Grand Junction.

Pot activists said they agree driving while high should remain illegal. But some vigorously object to blood testing as a measure of impairment. Because marijuana chemicals are stored in the body's fat, levels can build up over time in people who use pot often.

Scientists gave conflicting testimony Monday.