Construction Manual
This manual provides department construction engineering personnel instruction for fulfilling the objectives, procedures, and methods for construction administration of Washington State transportation projects. The Construction Manual is intended as a reference book.
The Construction Manual can be downloaded in PDF format and printed without charge.
Individual Chapters
Foreword (PDF 168KB)
Contents (PDF 220KB)
Chapter 1 Administration (PDF 1.3MB)
Chapter 2 Temporary Features (PDF 3.7MB)
Chapter 3 Earthwork (PDF 3.1MB)
Chapter 4 Aggregates and Bases (PDF 365KB)
Chapter 5 Surface Treatments and Pavements (PDF 553KB)
Chapter 6 Structures (PDF 4.4MB)
Chapter 7 Drainage Structures, Sewers, and Conduits (PDF 3.2MB)
Chapter 8 Miscellaneous Construction (PDF 2.7KB)
Chapter 9 Materials (PDF 1.7KB)
Chapter 10 Documentation (PDF 1.2KB)
Chapter 11 Forms (PDF 345KB)
Revision History
M 41-01.48
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1,557 work zone-related crashes
were recorded on state highways in 2025.
Phone down, eyes up.
Pay attention – both to workers directing you and to surrounding traffic.
Stay calm
Expect delays, leave early or take an alternate route if possible; no appointment is worth risking someone’s life.