It's going to be a while before we've figured out our brave new marijuana-approved world. The next lesson comes courtesy of the Michigan Supreme Court, which has reportedly ruled that it isn't necessarily against the law for a medical marijuana user to drive with the drug in their system. The ruling comes after motorist Rodney Koon was busted for doing 83 miles per hour in a 55-mph zone and tested positive for "internal possession of marijuana."

Koon said it had been at least six hours since he "used his medicine," and the blood test registered 10 nanograms per milliliter of the active ingredient in marijuana, THC. The 86th District Court in Grand Traverse County, MI – the county where Koon was caught – ruled that it took five times that amount to declare a person stoned.

But that was the ruling of a single court. The problem for the Michigan Supreme Court justices was that the state of Michigan hasn't explicitly identified the threshold for being under the influence marijuana, the same way it usually takes a blood-alcohol level of at least .08 to be considered under the influence of alcohol, and charged with driving while intoxicated. The vagaries pitted the state's Zero Tolerance policy against the protections accorded by Michigan's Medical Marijuana Act, and the Zero Tolerance policy lost. We imagine there'll be a rematch – yet another one – soon enough.

I'm reporting this comment as:

Reported comments and users are reviewed by Autoblog staff 24 hours a day, seven days a week to determine whether they violate Community Guideline. Accounts are penalized for Community Guidelines violations and serious or repeated violations can lead to account termination.

    • 1 Second Ago
  • 2015 Toyota Highlander
    MSRP: $29,765 - $44,140
    2015 Honda Accord
    MSRP: $22,105 - $33,630
    2015 Toyota Corolla
    MSRP: $16,950 - $22,955
    2015 Mazda Mazda3
    MSRP: $16,945 - $25,545
    2015 Jeep Grand Cherokee
    MSRP: $29,995 - $64,895
    Share This Photo X