Drivers in parts of Burien, SeaTac, Des Moines and Kent should expect continued lane and ramp closures on I-5, SR 509 and SR 516 from Monday through early Wednesday, according to the Washington State Department of Transportation (WSDOT).
Ramp closures on I-5 will allow crews to continue building noise walls.
Lane closures on SR 516 will allow crews to perform utility work.
Lane and ramp closures on SR 509 will allow crews to install signage.
This work is part of the SR 509 Completion Project.
I-5 ramp closure information
Monday, Dec. 22 through the morning of Tuesday, Dec. 23:
- 11:30 p.m. to 4 a.m. – The southbound I-5 exit to SR 516 will close overnight. A signed detour will be in place.
Monday, Dec. 22 through the morning of Wednesday, Dec. 24:
- 9:30 p.m. to 3:30 a.m. – The northbound I-5 exit to 24th Avenue South will close nightly. A signed detour will be in place.
SR 509 lane closure information
Monday, Dec. 22 through the morning of Wednesday, Dec. 24:
- 8 p.m. to 5 a.m. – One lane of southbound SR 509 will close nightly between South 156th and South 188th streets.
Tuesday, Dec. 23 through the morning of Wednesday, Dec. 24:
- 7 p.m. to 5 a.m. – One lane of northbound SR 509 will close overnight between South 188th and South 176th streets.
SR 509 ramp closure information
Monday, Dec. 22 through the morning of Tuesday, Dec. 23:
- 9 p.m. to 5 a.m. – The South 160th Street on-ramp to southbound SR 509 will close overnight. A signed detour will be in place.
Monday, Dec. 22 through the morning of Wednesday, Dec. 24:
- 9 p.m. to 5 a.m. – The South 160th Street on-ramp to northbound SR 509 will close nightly. A signed detour will be in place.
SR 516 lane closure information
Monday, Dec. 22 through the morning of Tuesday, Dec. 23:
- 8 p.m. to 5 a.m. – One lane of westbound SR 516 will close overnight between Military Road South and SR 99.
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 opened on July 16. 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.
