Find state roadside safety policies and guidance for designers in Division 16 of the WSDOT Design Manual.
Before using these chapters, designers need to see WSDOT Design Manual Chapter 1105 (PDF 127KB) (for Improvement projects) or Chapter 1120 (PDF 97KB) (for Preservation projects) to determine what kind of roadside safety design and analysis are required on your project.
Design Manual M22-01
Chapter 1600 Roadside Safety (PDF 678KB)
Chapter 1610 Traffic Barriers (PDF 1.2MB)
Chapter 1620 Impact Attenuators (PDF 1.8MB)
Design Bulletins about roadside safety are occasionally issued to provide clarification or additional guidance for certain situations or projects types. They are normally provided between manual updates, and eventually incorporated into the WSDOT Design Manual or retired depending on the topic. See the Roadside Safety questions and answers (DOCX 22KB) that specifically addresses emergent questions in roadside safety.
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