All old HTML web pages are being retired for security reasons and will soon be inaccessible. We have made changes to the search functions of the WSDOT Interchange Viewer Web App and added notations on how to use the Web App to improve your experience. Please contact us if you need assistance.
Welcome to the WSDOT Interchange Viewer. Here you can view and print drawings of state highway interchange areas, couplets and other select locations, in pdf format. While not drawn to scale, these drawings can be used to help locate collisions more accurately, to identify specific ramps and to assist in other planning purposes. The interchange drawings are updated through state highway construction contracts, subsequent on-site inspections and input from WSDOT staff.
If you need additional information or have questions please email TransportationGISDataSteward@WSDOT.WA.GOV with the subject line "Query for Interchange Viewer Version One".
Please Note: To ensure both current and historical interchange system information is available to all who utilize the Interchange Drawing Viewer, some of the Interchange Drawing PDF files will display with hand-sketched updates. New hand-sketched files will be added when updated information is received through construction and maintenance channels. New digitized files will be added as they are completed. There is currently a five-year backlog on digitizing the files.
