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 Massachusetts. Bicycles are prohibited on Massachusetts Interstate highways (I-90 Mass. Pike, I-93, I-95, I-195, I-290, I-495) under MassDOT controlled-access regulations. The Bourne and Sagamore Bridges over the Cape Cod Canal carry separate sidewalks for bicycles. Conventional US and state routes (US-1, US-3, MA-2) remain open.
What this means in practice
Stick to surface streets, US routes, state highways, and dedicated paths. If your route in Massachusetts appears to use an Interstate, plan a detour before you start.