Glossary and Abbreviations & Acronyms List
Check out these tools to find definitions of terms and decode common abbreviations used by WSDOT.
WSDOT Glossary
The WSDOT Glossary (PDF 1.8MB) is a developing resource to centralize terms from WSDOT Manuals, documents such as transportation plans, and areas of expertise within the agency. Its purpose is to provide authoritative definitions and source information to support understanding and clear communication among WSDOT practitioners, agency partners and the public. Entries consist of terms (listed alphabetically), definitions, sources, and where applicable, related information.
To find terms of interest, press ctrl and F on your keyboard and enter the desired term in the box.
Abbreviations & Acronyms List
The Abbreviations & Acronyms List (PDF 192KB) spells out short forms of words and phrases commonly used in transportation and related fields.
We welcome your feedback
The WSDOT Glossary and Abbreviations & Acronyms List will be updated periodically, and we welcome your suggestions for improving them. If you have questions, comments, or suggestions for additions to either resource, please email library@wsdot.wa.gov.
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.