 Recent residential development in Maple Valley and surrounding areas has increased traffic congestion on the highway, leading to a series of widening and improvement projects funded primarily by city governments.SR 169 begins on a section of Porter Street in downtown Enumclaw at an intersection with SR 164 (Griffin Avenue).The intersection is adjacent to a satellite campus of the Green River College system and is a half-mile () from the junction of SR 164 and SR 410, which travels west towards Puyallup and east across the Cascade Mountains.