Traffic Manual

Publication Number
M 51-02
Publication Version
M 51-02.10
Publication Date
Manual Manager
Mike Dornfield
Traffic Operations, Engineering and Regional Operations Division


The Traffic Manual is a guide for department personnel in traffic operations and design. It does not establish absolute standards but establishes uniform guidelines and procedures for the use of traffic control devices.

May 2021 M 51-02.10 revision package (PDF 18.3MB)

Individual Chapters

Foreword (PDF 195KB)
Contents (PDF 233KB)

Chapter 1 General Information (PDF 394KB)
Chapter 2 Signs (PDF 870KB)
Chapter 3 Delineation and Markings (PDF 313KB)
Chapter 4 Multimodal Planning, Design, and Operational Considerations (PDF 156KB)
Chapter 5 Work Zone Traffic Control (PDF 3.3MB)
Chapter 6 Traffic Regulations (PDF 595KB)
Chapter 7 Specialized Highway Uses (PDF 1.7MB)
Chapter 8 Highway Advertising Control (PDF 1.2MB)
Chapter 9 Traffic Planning, Safety, Operations, and Design (PDF 340KB)
Chapter 10 Intersection Control Evaluation (PDF 365KB)
Chapter 11 Traffic Engineering Records Management (PDF 463KB)
Chapter 12 Multimodal Traffic Impact Analysis Guidelines (PDF 174KB)

Revision History

May 2021

November 2018

July 2015

December 2011


April 2011

April 2010

October 2009

May 2009

August 2008

January 2005

March 2002

November 1996

Slow down – lives are on the line. 

In 2023, speeding continued to be a top reason for work zone crashes.

Even one life lost is too many.

Fatal work zone crashes doubled in 2023 - Washington had 10 fatal work zone crashes on state roads.

It's in EVERYONE’S best interest.

95% of people hurt in work zones are drivers, their passengers or passing pedestrians, not just our road crews.