 News Radio Traffic from the High Performance Homes Traffic Center. In the Kent area on southbound Highway 99 between Highway 516 and South 240th Street, the roadway is reduced to just two lanes until 5 a.m. for construction work. And in the SeaTac area, southbound I-5 between South 200th and South 272nd, up to three lanes are closed overnight until 6 a.m. I'm Jay Phillips, Northwest News Radio Traffic.