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 206KB) 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.

Traction tires are a special type of tire

manufactured with at least 1/8 of an inch tread. Traction tires are usually marked with a mountain/snowflake symbol, the letters M+S or “All Season.”

Carry chains, practice before leaving

Requiring chains keeps traffic moving during storms rather than closing a pass or roadway.

Prep your car. Fill up your gas tank,

pack jumper cables, ice scraper, warm clothing, snacks and water.