Lane and ramp closures on I-5, SR 516 and SR 509 in Burien, Des Moines, SeaTac and Kent continue this week, through the morning of Thursday, July 3, 2025.
The lane and ramp closures on I-5 will allow contractor crews to install signs and perform paving work.
The lane and ramp closures on SR 516 will allow crews to perform drainage work. The SR 509 ramp closure will allow crews to perform drainage and paving work.
This work is part of the SR 509 Completion Project.
I-5 lane closure information
Monday, June 30 through the morning of Thursday, July 3:
- 11:59 p.m. to 4:30 a.m. – Up to four lanes of northbound I-5 will close nightly between SR 516 (Exit 149) and South 200th Street/Military Road South (Exit 151). Travelers may encounter a rolling slowdown.
Monday, June 30 through the morning of Thursday, July 3:
- 11:59 p.m. to 6 a.m. – Up to three lanes of southbound I-5 will close nightly between South 200th Street/Military Road South (Exit 151) and SR 516 (Exit 149).
I-5 ramp closure information
Tuesday, July 1 through the morning of Wednesday, July 2:
- 9:30 p.m. to 4 a.m. – The northbound I-5 exit to SR 516 will close overnight. A signed detour will be in place.
SR 516 lane closure information
Wednesday, July 2 through the morning of Thursday, July 3:
- 8 p.m. to 5 a.m. – One lane of eastbound SR 516 will close overnight between Military Road South and SR 99.
- 10:30 p.m. to 4 a.m. – Westbound SR 516 will close overnight between SR 99 and Military Road South.
SR 509 ramp closure information
Monday, June 30 through the morning of Wednesday, July 2:
- 9 p.m. to 5 a.m. – The South 160th Street ramp to northbound SR 509 will close nightly. A signed detour will be in place.
- 10 p.m. to 5 a.m. – The northbound SR 509 exit to South 160th Street will close nightly. A signed detour will be in place.
- 10 p.m. to 5 a.m. – The southbound SR 509 exit to South 160th Street will close nightly. A signed detour will be in place.
SR 509 Completion Project information
The SR 509 Completion Project builds 3 miles of new tolled highway between I-5 and South 188th Street near the south end of Seattle-Tacoma International Airport. The new highway will be completed in stages. The portion between I-5 and 24th Avenue South opened on June 28 and a new tunnel under I-5 at the SR 516 interchange opens mid-July. The final stage builds the remaining 2 miles of the expressway between 24th Avenue South and South 188th Street. The entire project is planned for completion by 2029.
Puget Sound Gateway Program overview
The SR 509 Completion Project is part of WSDOT’s Puget Sound Gateway Program, which also includes the SR 167 Completion Project in Pierce County. Together, the two completion projects finish critical missing links in Washington’s highway and freight network.
