 In 2011, WSDOT calculated that between 9,200 and 34,000 vehicles per day used the highway, mostly in the Auburn area.WSDOT has designated SR 164 as a Highway of Statewide Significance, which includes principal arterials that are needed to connect major communities in the state.SR 164 was first defined under law to be built and paved by the state of Washington in 1913 as the McClellan Pass Highway, extending southeast from Tacoma along the Puyallup and White rivers to Chinook Pass and towards Naches along an existing county road from Auburn and Enumclaw built in the 1890s.