Infrastructure

I-405 lane closures extend through Labor Day

Thursday, August 27, 2026

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I-405 will see extended lane closures from Friday, Aug. 28 through Monday, Aug. 31, affecting northbound traffic between Northeast 70th Place and Northeast 85th Street. A signed detour will be in place during the overnight work hours.

WSDOT also announced ongoing closures for SR 9 fish passage construction near Kalloch Road through Sept. 14, with alternating traffic for 42 days, and a single-lane reduction near Mount Vernon through Sept. 3. The SR 599 maintenance closure will affect northbound traffic and an off-ramp from 9 p.m. Friday through 5 a.m. Saturday.

📄 Source: WSDOT — Highway Construction & Closures — https://wsdot.wa.gov/travel/road-construction

Source receipts9 of 11 claims supported · 82%

Legacy automated check: the original source text was not preserved. These earlier verdicts have not passed the current publication checks and may contain errors. Source: original document ↗

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I-405 will see extended lane closures from Friday, Aug. 28No usable supporting receipt — unverified.
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I-405 will see extended lane closures through Monday, Aug. 31“405: Up to three lanes of northbound I-405 will close from the Northeast 85th Street on-ramp to Northeast 100th Street from 11 p.m. Friday Aug. 28 to 4 a.m. Monday, Aug. 31. A signed detour will be in place.”
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I-405 lane closures will affect northbound traffic between Northeast 70th Place and Northeast 85th Street“405: All lanes of northbound I-405 will close from Northeast 70th Place to Northeast 85th Street from 11 p.m. Friday Aug. 28 to 4 a.m. Monday, Aug. 31. A signed detour will be in place.”
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A signed detour will be in place during the overnight work hours“A signed detour will be in place.”
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WSDOT announced ongoing closures for SR 9 fish passage construction near Kalloch Road“009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 42 days, until Sept. 14 for fish passage construction. Expect delays in the area.”
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SR 9 fish passage construction closures will continue through Sept. 14“009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 42 days, until Sept. 14 for fish passage construction. Expect delays in the area.”
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SR 9 fish passage construction will have alternating traffic for 42 days“009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 42 days, until Sept. 14 for fish passage construction.”
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A single-lane reduction near Mount Vernon will be in place through Sept. 3No usable supporting receipt — unverified.
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SR 599 maintenance closure will affect northbound traffic“599: From 9 p.m. Friday, Aug. 28 to 5 a.m. Saturday, Aug. 29, the right lane of northbound State Route 599 and the off-ramp to Tukwila International Boulevard (milepost 1) will close for maintenance.”
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An off-ramp will be affected by SR 599 maintenance closure“599: From 9 p.m. Friday, Aug. 28 to 5 a.m. Saturday, Aug. 29, the right lane of northbound State Route 599 and the off-ramp to Tukwila International Boulevard (milepost 1) will close for maintenance.”
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SR 599 maintenance closure will be in place from 9 p.m. Friday through 5 a.m. Saturday“599: From 9 p.m. Friday, Aug. 28 to 5 a.m. Saturday, Aug. 29, the right lane of northbound State Route 599 and the off-ramp to Tukwila International Boulevard (milepost 1) will close for maintenance.”