Both directions of State Route 161 in Federal Way and Milton will reduce to one lane from 9 p.m. to 5 a.m. nightly Monday, Oct. 19, through Friday morning, Oct. 23, between South 370th Street and Military Road South for construction.
At least one lane of SR 161 will remain open through this area each night.
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WSDOT highway construction and road closures within 50 miles of Puyallup — 10/19/2026: 161 [5 mi from Puyallup]: Both directions of State Route 161 in Federal Way and Milton will reduce to one lane from 9 p.m. to 5 a.m. nightly Monday, Oct. 19, through Friday morning, Oct. 23, between South 370th Street and Military Road South for construction. At least one lane of SR 161 will remain open through this area each night. Effective: Oct 19, 2026, 3:15 PM Expected end: Oct 23, 2026, 5:00 AM 410 [20 mi from Puyallup]: Eastbound and westbound SR 410 will alternate from 8 a.m. to 4 p.m. daily between the Scatter Creek Bridge and Twin Creek Bridge (milepost 31-38) for utility work. Effective: Oct 16, 2026, 11:43 AM Expected end: Oct 22, 2026, 4:00 PM 405 [21 mi from Puyallup]: Up to three lanes of northbound I-405 from SR 169 (milepost 4) to Sunset Boulevard North / SR 900 (milepost 5.5) will be closed nightly from 9 p.m. - 5 a.m., starting the night of Monday, Oct. 19 to the morning of Friday, Oct. 23. Effective: Oct 19, 2026, 12:00 AM Expected end: Oct 23, 2026, 5:00 AM 099 [22 mi from Puyallup]: The right lane of both directions of Tukwila International Boulevard will close beneath SR 99 from 10 a.m. to 3 p.m. daily Tuesday and Wednesday, Oct. 20-21, for maintenance. Effective: Oct 16, 2026, 11:35 AM Expected end: Oct 21, 2026, 3:00 PM 405 [22 mi from Puyallup]: The Sunset Boulevard North / SR 900 on-ramp to northbound I-405 will be closed nightly from 9 p.m. - 5 a.m., starting the night of Monday, Oct. 19 to the morning of Wednesday, Oct. 21. A signed detour will be in place. Effective: Oct 19, 2026, 12:00 AM Expected end: Oct 21, 2026, 5:00 AM 405 [23 mi from Puyallup]: Up to two lanes of southbound I-405 from North 30th Street (milepost 6) to Talbot Road South / SR 515 (milepost 3) will be closed nightly from 10:30 p.m. - 4:30 a.m., starting the night of Monday, Oct. 19 to the morning of Friday, Oct. 23. Effective: Oct 19, 2026, 12:00 AM Expected end: Oct 23, 2026, 4:30 AM 900 [23 mi from Puyallup]: Expect alternating traffic near the SR 900 intersection with May Valley Road (milepost 17-18) from 9 a.m. to 3 p.m. daily Monday, Oct. 19, through Thursday, Oct. 22, for utility work. Effective: Oct 16, 2026, 1:12 PM Expected end: Oct 22, 2026, 3:00 PM 405 [24 mi from Puyallup]: Up to two lanes of northbound I-405 from Northeast 44th Street (milepost 7) to 112th Avenue Southeast / Lake Washington Boulevard Southeast (milepost 9) will be closed nightly from 9 p.m. - 1 a.m., starting the night of Monday, Oct. 19 to the morning of Friday, Oct. 23. Effective: Oct 19, 2026, 12:00 AM Expected end: Oct 23, 2026, 1:00 AM
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