Colorado Pot DUI Bill Amended To Become Study

DENVER (AP) -- Medical marijuana users scored a victory by persuading Colorado officials to further study what constitutes being too high to drive.

A subtle tinge of marijuana smoke permeated a committee room as Colorado senators voted Monday to weaken a proposal that would have set the country's most liberal blood-content limit under the law for what's too high to drive. The proposed limit is a THC level of 5 nanograms per milliter in a user's blood. THC is the psychoactive ingredient in marijuana.

A couple other states have limits of 2 nanograms.

Lawmakers amended the bill so a state task force will study what is the appropriate standard to consider marijuana users too impaired to drive.

Republican Sen. Steve King, one of the bill's sponsors, says it's possible the bill could be changed back to its original form.

Bill opponents say there is no clear science to determine impairment for driving after smoking.

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