DUI DUI

Although consuming cannabis is legal in Colorado and several other states, driving while under the influence of the drug is not. Nick Pedersen/Getty Images hide caption

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Nick Pedersen/Getty Images

Scientists Still Seek A Reliable DUI Test For Marijuana

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Gov. Gary Herbert resisted recent calls to veto a bill giving Utah the strictest DUI threshold in the country, lowering the blood alcohol limit to .05 percent, down from .08 percent. Last week, demonstrators on both sides of the issue visited the Utah State Capitol. Rick Bowmer/AP hide caption

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Rick Bowmer/AP

Can Sobriety Tests Weed Out Drivers Who've Smoked Too Much Weed?

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More Washington Drivers Use Pot And Drive; Effect On Safety Disputed

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