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Welcome to the MUTCD Wiki!

As the name implies, this site is intended to serve as an interactive wiki for devices, treatments, and issues involving the US Manual on Uniform Traffic Control Devices (MUTCD). This page is hosted by the Manual of Traffic Signs website. Anyone with an interest in the MUTCD or in traffic control devices is welcome, but only registered users may edit or add content.

This website is not owned or maintained by the Federal Highway Administration, and has no official regulatory status. Although the owner of the domain is employed by the National Committee on Uniform Traffic Control Devices, this website is an independent entity and not owned or maintained as part of NCUTCD.

Rules and Guidelines

Parts of the MUTCD

The MUTCD is comprised of an Introduction and nine Parts. The Introduction contains information on the structure and legal status of the MUTCD, along with compliance dates. The first Part has general information on all devices and definitions. Parts 2, 3, and 4 focus on device types, while Parts 5-9 focus on applications for different situations.

Proposed New Edition of the MUTCD (11th Edition)

11th Edition of the MUTCD (Draft)

Editions of the MUTCD

The current edition is the 2009 Edition of the MUTCD. Earlier editions were published in 2003, 2000, 1988, 1978, 1971, 1961, 1954, 1948, 1942, and 1935.

Rulemaking on a new edition of the MUTCD began on December 14, 2020 and closed on May 14, 2021. The Infrastructure Investment and Jobs Act (IIJA) directs USDOT to update the MUTCD by no later than May 15, 2023, and at least every 4 years thereafter.

Other MUTCD Resources

Official Rulings and Interpretations

Interim Approvals

Standard Highway Signs and Markings

Non-FHWA Resources

Traffic Control Devices Handbook

Research on Traffic Control Devices

History of the MUTCD Wiki Project

In 2013, Scott O. Kuznicki, P.E., and Ryan Avery, Ph.D., P.E., developed the concept of using open-source architectures for policy development. They subsequently authored and submitted a professional practice paper to the Transportation Research Board of the National Academies. This paper, titled "Database-Driven Implementation for Future Editions of the MUTCD", was published to the Transportation Research Record and accepted for presentation at the 93rd Annual Meeting of the Transportation Research Board. The authors proposed the use of relational databases for managing the information contained in regulatory policy documents and outlined various methods of providing for collaborative changes to regulatory policy. The primary means by which the authors assumed the regulatory policy would be managed was anticipated to be a "wiki"-style interface that relied on a robust relational database, moderated threaded discussions associated with specific elements of records in the database, and a means of categorizing the content such that content involving a mandate would remain subject to the Federal Regulatory Process under the Administrative Procedures Act of 1946. This project is the first step in creating a new platform for engagement, curation, and dissemination.

Consult the User's Guide for information on using the wiki software.