This guide is for general information only and is not legal advice. Laws change — verify current rules with your state DOT or a licensed attorney before relying on this for any legal matter. Read full disclaimer.
The rule
Bicycles are prohibited on Interstate highways in Michigan. Bicycles are prohibited on Michigan Interstate freeways (I-75, I-94, I-96, I-69, I-275, I-696) under Michigan Department of Transportation (MDOT) controlled-access regulations. The Mackinac Bridge runs an annual Labor Day bike-walk crossing under MDOT escort. Conventional US and state routes (US-2, US-23, M-22) remain open to bicycles.
What this means in practice
Stick to surface streets, US routes, state highways, and dedicated paths. If your route in Michigan appears to use an Interstate, plan a detour before you start.