Bicycle Highway-Access Laws in Illinois
Last reviewed by BikeSize EditorialThis 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 Illinois. Bicycles are prohibited on all Interstate highways in Illinois under IDOT policy (625 ILCS 5/11-1426.1 authorises the Department to prohibit pedestrians, bicycles, and other slow-moving traffic on any controlled-access highway). Conventional US routes and state highways are open by default; the Illinois Bicycle Rules of the Road manual lists the signed exceptions.
What this means in practice
Stick to surface streets, US routes, state highways, and dedicated paths. If your route in Illinois appears to use an Interstate, plan a detour before you start.
Bigger roads, longer rides
Size a road bike for shoulders, group rides, and rural highways
Highway-access and group-riding rules favour riders who can hold a straight line at speed. Start with a frame that fits.
See the road sizing guide