State Route 99 (SR 99) is a  state highway serving the Seattle metropolitan area in the U.S. state of Washington. A gap divides the highway into two segments, between the interchanges of SR 518 and SR 599 in Tukwila. The southern segment of SR 99 travels north from Fife through the cities of Federal Way, Des Moines, Kent, and SeaTac to Tukwila. The northern segment of SR 99 continues north from Tukwila through Seattle, Shoreline, Edmonds, Lynnwood, to the Broadway Interchange in Everett.