Bike path to nowhere?
What is really problematic is the speed/mass/hardness differentials between autos/trucks and people on bikes. I personally would be very apprehensive to use a bike path in vehicular traffic.
Another issue is the weather, deep snow and slush make biking a really practical (/sarc) thing in Michigan during the winter. (Not to mention sheets of icy water and snow thrown up off the tires of passing trucks.)
ps. Isn't Michigan also responsible for the curly light bulbs?