state route mile long state highway serving clark counties state washington highway travels north short concurrency eastern terminus communities rural crossing yale bridge intersects spur route turns west parallel downstream woodland highway ends interchange interstate highway signed state road current route split woodland combined form highway renumbering spur route established travels northeast serving community route description begins concurrent intersection fourth plain road highways travel north lane avenue turns east parkway continues north rural passing roadway bypasses west crosses turns northeast avenue enters 10th avenue intersects eastern terminus west highway crosses lewis river leaves pass listed national_register_of_historic_places located continues heading northeast heavily forested region foothills lake turns east lake highway enters following highway travels north crosses foot long lane warren bridge listed national_register_of_historic_places located downstream upstream continues turns west intersection spur route heads east highway travels southwestward valley passes communities yale enters woodland turns south ending diamond interchange near confluence lewis columbia rivers year conducts series surveys highways state measure traffic volume expressed terms average annual daily traffic aadt measure traffic volume average day year calculated busiest section highway concurrency serving vehicles busiest section western terminus spur east yale serving vehicles designated national_highway_system includes roadways important national economy defense mobility history follows route state road established traveling east woodland county line lewis river road removed state highway system transferred maintenance clark counties contracted build bridge bridge opened traffic september cost completion dam downstream caused water levels rise counties completed lane warren bridge named yale bridge following year serve remote communities yale creation primary secondary state highways state road added state highway system traveled miles turned west end north established traveled miles south maintained clark counties 1940s timber approach spans replaced steel maintenance established highway renumbering codified successor woodland remaining portion highway valley woodland yale bridge closed following eruption opened yale bridge placed national_register_of_historic_places july spur route added state highway system original yale county line designated serving historic park spur route spur known locally begins mile long route intersection east yale north yale bridge highway travels northeast yale lake forested region passing yale park community spur turns east beaver bay park ends shortly line south lewis river road state road established spur route conducted series surveys measure traffic volume terms aadt calculated vehicles day spur route major intersections
Washington State Route 503