Ann Arbor Police might give you a ticket if they bust you for being negligent with cannabis in public, but that’s usually if they get a complaint or you’re smoking a joint in plain view of an officer of the law
After I left Washtenaw County to live in the southern United States for a few years, people never believed me about the progressive stance towards marijuana back home. Forget about the current legal status of recreational marijuana in Michigan, it has been decriminalized in my hometown of Ann Arbor since the early 1970s. In the south you could get arrested if a cop found a single roach or weed seed in your car. I had a friend of mine who had a perfect score on his SAT and yet got expelled from high school just a few months before graduation after something tragic occurred with a stray cannabis seed in his car. A cop was looking through his driver side window at a can of soda in his cup holder after initially mistaking it for beer. However, he looked closer and saw a seed sitting next to a stray Bic lighter and that was all the probable cause that he needed to initiate a search of the vehicle. Even though my friend didn’t have weed with him that day or in his car at all that week, they tested the seed and then expelled him when the results came back. Ann Arbor Police might give you a ticket if they bust you for being negligent with cannabis in public, but that’s usually if they get a complaint or you’re smoking a joint in plain view of an officer of the law. Much of the time they would rather avoid cannabis calls and focus on more pressing matters at hand, like violence, theft, or sexual assault. I still couldn’t convince my friends that my hometown had a literal “pot fine” instead of an arrest-mindset.