Marijuana Laws Are Changing. Will DUI Laws Follow?

There is little agreement or clarity on what the level of driving impairment is for marijuana, though the idea is mentioned by lawmakers.

Lawmakers weighing whether to legalize weed are grappling with some tricky questions, like: How high is too high to drive? What exactly qualifies as "driving under the influence" when it comes to weed?

Generally, the penalties for marijuana-related DUIs are the same as those for alcohol-related DUI convictions. The consequences of a first offense might include license suspension of 90 days to a year, fines ranging from about $500 to $2,000 and/or up to a year in jail.

Though it may sound simple, it's not. When you investigate exactly how law enforcement is able to tell — let alone prove — that someone is actively high while driving, things can get a little complicated.