Maintenance Manual

Publication Number
M 51-01
Publication Version
M 51-01.12
Publication Date
Manual Manager
Kelly Shields
Maintenance and Operations Programs
Maintenance of highways.

The Maintenance Manual provides maintenance personnel with procedures and guidelines for maintaining the highway system in Washington State. It focuses on equipment, materials, facilities, techniques, and other information to carry out maintenance activities of the department. This manual does not establish absolute standards but provides uniform operating procedures and performance guidelines.

Individual Chapters

Foreword (PDF 173KB)

Contents (PDF 250KB)

Chapter 1 Emergency Procedures (PDF 107KB)

Chapter 2 Work Zone Traffic Control and Safety (PDF 334KB)

Chapter 3 Pavement Patching & Repair (PDF 452KB)

Chapter 4 Drainage (PDF 181KB)

Chapter 5 Maintenance of Structures (PDF 268KB)

Chapter 6 Roadside Management (PDF 1.6MB)

Chapter 7 Snow and Ice Control (PDF 276KB)

Chapter 8 Traffic Services (PDF 285KB)

Chapter 9 Electrical System Maintenance (PDF 172KB)

Chapter 10 Miscellaneous (PDF 252KB)

Chapter 11 Maintenance and Design Coordination (PDF 252KB)


Appendix A (PDF 2.3MB)
Appendix B (PDF 293KB)

Revision History

March 2021

September 2020

March 2020

March 2020

April 2019

June 2017

April 2017

August 2013

October 2010

February 2008

July 2007

January 2007

February 2005

September 2004

March 2002

Traffic fatality crashes on Washington public roadways

increased 56% in March 2021 compared to March 2020.

11,906 incidents responded to

by WSDOT’s incident Response teams during the third quarter of 2021, nearly 6% more than same quarter in 2020.

WSF ridership was nearly 5.7 million in the first quarter of fiscal year 2022,

which was 1.6 million (38.3%) higher than the corresponding quarter in FY2021