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 contact Lou Baker in the The GIS & Roadway Data Branch or you can reach him by phone (360) 570-2361.