Engineering & standards
Design topics
Find resources to support practical decision-making during pre-design, scoping and design for your projects.
All manuals & standards
Find manuals, standards, specifications and details covering requirements for projects.
Planning guidance
Use these resources to align your plan or study with WSDOT standards and best practices.
Project management & training
Find tools that provide the framework for project managers to deliver projects on time, within scope and budget. Find available trainings covering various topics.
Environmental guidance
Resources for environmental and transportation professionals, organized by discipline.
Construction
Find information on construction materials and construction guidance.
Transportation System Management and Operations - TSMO
Learn about Transportation Systems Management and Operations (TSMO) and how it is changing how we manage transportation infrastructure.
1,557 work zone-related crashes
were recorded on state highways in 2025.
542 people were injured
in 2025 due to work zone-related crashes.
29% increase in fatality collisions
in work zones from 2024 to 2025.