Kent I-5 southbound nighttime closures set for Aug. 10-14

Published 1:57 pm Friday, August 7, 2026

Drivers should expect nighttime lane closures on Interstate 5 in Kent from Monday, Aug. 10 to the morning of Friday, Aug. 14.

Up to two lanes of southbound I-5 will close nightly from SR 516 (Exit 149) to South 272nd Street (Exit 147) from 10 p.m. to 6 a.m.

The lane closures on I-5 will allow contractor crews working for the Washington State Department of Transportation to perform drainage work.

The work is part of the State Route 509 Completion Project, which builds 3 miles of new tolled highway between I-5 and South 188th Street near the south end of Sea-Tac Airport.

The new highway will be completed in stages. The first mile between I-5 and 24th Avenue South opened in June 2025. Construction of the final 2 miles between 24th Avenue South and South 188th Street is underway and currently scheduled to open to traffic in July 2028.