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MUTCD 11th Edition, Revision 1

Last updated June 4, 2026

A searchable, deep-linkable copy of the Manual on Uniform Traffic Control Devices, the U.S. standard for traffic signs, signals, and pavement markings.

We're Roundabout Technologies, and we built this because we kept needing to search the manual, jump to a specific section, and send a teammate a link to the exact paragraph we were looking at, and it was a real pain to do so with the 1000 page pdf. We thought others would find it useful so we made it publicly available, and we hope it's helpful!

What Roundabout does

We build AI-powered traffic signals that use cameras to build a real-time, super-detailed 3D map of all cars, bikes, buses and pedestrians, then use that map to make optimal signal change decisions at every moment, for single intersections and across road networks. If that sounds interesting, you can subscribe to our newsletter or reach out at roundabout.tech/contact. We'd love to hear from you.

How to use this edition

Use the nav or the search box to move around Parts 1 through 9 and the appendices. Every numbered section has its own stable link, so a part page plus #4I.06 drops you right on that section. Clicking the section header copies the link to that section. The Sign Code Index maps every sign code (R1-1, W1-1, EM2-1, …) to a picture of the sign and the section that defines it.

Found something off?

If you have feedback or suggestions, please let us know here: roundabout.tech/contact.

State editions

Many states publish their own MUTCD, this federal manual adopted with state-specific amendments. We mirror those the same way, each at its own permanent link:

  • California MUTCD 2026: Caltrans' adoption of this manual, amended for use in California (effective January 18, 2026).
  • Arizona MUTCD 2026: this manual as amended by the Arizona Supplement (January 2026).
  • Colorado MUTCD: this manual with the Colorado Supplement applied (January 2026).
  • Washington MUTCD: this manual with Washington's WAC 468-95 modifications applied (October 2025).

More states are on the way.

Unofficial convenience copy

This isn't the official, controlling document though we will try to keep it as accurate and up to date as possible as new revisions and editions come out. The MUTCD is a public-domain work of the U.S. federal government. For the authoritative text, use the official edition from the Federal Highway Administration.