SR 18 Interchange Feasibility

TSI assisted the Muckleshoot Indian Tribe in conjunction with the City of Auburn and WSDOT on design alternatives for a proposed bypass road from SR 164 through tribal lands to SR 18. Our work involved the preliminary design of a new interchange on SR 18 which incorporated dual roundabouts and elevated on/off ramps to/from the highway. Other design related work has been assisting with the preliminary alignment of the local road network proposed to connect connecting SR 164 to SR 18.