Transportation Law: Riding a Bike on US Interstates

If you love cycling, you’ve probably wondered whether you can hop on an interstate and pedal your way across the country. The short answer? In most places, you’re not allowed to ride a bike on an interstate highway. That’s because interstates are built for fast‑moving cars, not bicycles. In this guide we’ll break down why the law says no, how it differs by state, and where you should go instead.

Why Interstates Are Off‑Limits for Cyclists

Interstate highways are designed for speeds of 55 mph and up. They have limited access points, no shoulder space for bikes, and high traffic volume. Even a single smart cyclist can become a serious hazard in that environment. That’s why federal regulations and most state statutes explicitly exclude bicycles from interstate travel. The rule protects both cyclists and drivers from dangerous collisions.

State‑by‑State Variations

While the federal government sets the overall framework, each state can add its own twists. Some states, like California and Texas, state outright that bicycles are prohibited on interstates, except on designated bike‑friendly sections that are clearly signed. Others, like Colorado, allow bicycles on certain non‑primary interstates if a local ordinance permits it. The bottom line: always check the specific state’s Department of Transportation website before you plan a cross‑state ride.

One practical tip is to use the Federal Highway Administration’s map of “bike‑friendly routes.” Those routes highlight state‑maintained roads that run parallel to interstates and are safe for cyclists. Apps like Strava or Komoot can also show you bike‑only paths that avoid high‑speed traffic.

What if you’re already on the road and see an interstate you think could be a shortcut? Pull over safely, look for signs, and pick a nearby surface road or trail. Most interstate entrances have clear signage indicating “No bicycles.” Ignoring those signs can lead to a ticket, a crash, or both.

Beyond the legal side, consider the practicalities: riding a bike on an interstate means facing wind gusts, debris, and limited places to stop if you need a break. Even if you manage to find a shoulder, it’s often too narrow for safe passing. Planning ahead overcomes these issues and keeps your ride enjoyable.

In short, the law keeps bicycles off interstates to protect everyone. By respecting those rules and using alternative routes, you’ll stay safe, avoid fines, and still enjoy the freedom of long‑distance cycling.