Transportation Data, GIS & Modeling

The Transportation Data, GIS & Modeling Office (TDGMO), supports the maintenance, preservation and operation of the Washington State transportation system by providing customers with timely, accurate and reliable roadway, traffic and crash data. We collect, process, analyze and report data for over 7,000 miles of state routes and over 80,000 miles of public roads. We deliver specialized GIS products and services in support of business operations throughout WSDOT. If you have any questions, please contact us.