WSDOT publishes roadside safety design, including design for traffic barriers, impact attenuators, and rumble strips. State roadside safety policies are covered in Division 7 of the Design Manual.
- Chapter 700, Roadside Safety
This chapter addresses the area outside of the roadway and is an important component of total highway design. Guidance on roadside safety issues is presented in this chapter.
- Chapter 710, Traffic Barriers
This chapter includes traffic barriers, terminals and transitions that are approved for use by WSDOT.
- Chapter 720, Impact Attenuators
This chapter describes the impact attenuators that are approved for use by WSDOT.