The Colorado state Senate rejected a bill Tuesday that would have created a blood alcohol limit for marijuana use for drivers. The so-called "D-U-High" bill, which would have banned drivers with more than 5 nanograms of THC per milliliter of blood, failed to break a tie of 17-17 in the Senate's special session, according to the Associated Press.

The bill (PDF), which aims to put the same standards in place for marijuana users that are already in place for alcohol users, passed the Colorado House late Monday, but failed to make it through the Senate. The bill was also introduced and failed by a single vote during Colorado's regular legislative session.

Opponents of the bill doubted the its efficacy. "I don't think it'll make our roads any safer," argued Democratic Sen. Pat Steadman to the AP.

According to Colorado's 9 News, one state senator who was absent during the vote Tuesday, Sen. Nancy Spence, voted for the bill during the regular session.

[Police cruiser stops vehicle via Anne Kitzman /]