📏Design Manual (M 22-01)
Design Manual (M 22-01)
WebWashington State Department of Transportation (WSDOT)2024 Standard Specifications
The WSDOT Design Manual establishes design policy for state highway projects including basic design level, geometrics, drainage, and roadside safety.
Local terminology: Washington calls its design manuals "Design Manual (M 22-01)" — the label used throughout this page reflects that convention.
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