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 Indiana. Bicycles are prohibited on all Interstate highways in Indiana under INDOT policy and Ind. Code § 9-21-8-58, which authorises the Department to bar pedestrians, bicycles, and other slow-moving traffic from any controlled-access facility. Conventional US routes and state highways are open by default.
What this means in practice
Stick to surface streets, US routes, state highways, and dedicated paths. If your route in Indiana appears to use an Interstate, plan a detour before you start.