Tiger Mountain to I-90 near Snoqualmie, to four lanes with a median barrier to separate opposing lanes of traffic and prevent head-on collisions. The western section will include a right-in/right-out interchange at the Tiger Mountain summit; $640 million was approved in the 2022 Move Ahead Washington transportation package. The I-90 interchange is planned to be rebuilt as part of a separate project scheduled to be completed in 2025; it was originally set to include flyover ramps and a double roundabout, but was later changed to a diverging diamond interchange. Major intersections References External links Highways of Washington State 018 Transportation in King County, Washington Federal Way, Washington Auburn, Washington