Infrastructure

I-405 closures for 4 nights starting Monday

Tuesday, September 15, 2026

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Multiple I-405 lanes and off-ramps will be closed nightly from Monday, Sept. 14, through Friday, Sept. 18, for construction work. The closures include northbound off-ramps to Northeast Fourth Street and Northeast Eighth Street, southbound lanes from milepost 14 to 12.5, and northbound lanes from milepost 12.5 to 13.8.

Additional closures will affect southbound lanes from milepost 11 to 8.5, northbound lanes from milepost 10.5 to 11, and the northbound off-ramp to westbound I-90, all with signed detours in place. A separate closure of the northbound I-405 off-ramp to Coal Creek Parkway Southeast will run from Sept. 18 at 11:30 p.m. to Sept. 21 at 4 a.m.

WSDOT's public records indicate construction work will occur overnight during the specified hours, with detours signed. The agency has not provided additional details on the nature of the work or its purpose beyond the scheduled closures.

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

Source receipts13 of 17 claims supported · 76%

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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Multiple I-405 lanes and off-ramps will be closed nightly“405 [1 mi from Eastside]: The northbound I-405 off-ramps to Northeast Fourth Street / Northeast Eighth Street will be closed nightly, 10 p.m. Monday, Sept. 14 – 4:30 a.m. Friday, Sept. 18. A signed detour will be in place.”
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The closures will start on Monday, Sept. 14“405 [1 mi from Eastside]: The northbound I-405 off-ramps to Northeast Fourth Street / Northeast Eighth Street will be closed nightly, 10 p.m. Monday, Sept. 14 – 4:30 a.m. Friday, Sept. 18.”
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The closures will end on Friday, Sept. 18No usable supporting receipt — unverified.
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The closures are for construction work“WSDOT highway construction and road closures within 50 miles of Eastside — 9/14/2026:”
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The closures include northbound off-ramps to Northeast Fourth StreetNo usable supporting receipt — unverified.
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The closures include northbound off-ramps to Northeast Eighth Street“405 [1 mi from Eastside]: The northbound I-405 off-ramps to Northeast Fourth Street / Northeast Eighth Street will be closed nightly, 10 p.m. Monday, Sept. 14 – 4:30 a.m. Friday, Sept. 18.”
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The closures include southbound lanes from milepost 14 to 12.5“Up to four lanes of southbound I-405 from Northeast Eighth Street (milepost 14) to milepost 12.5 will be closed nightly, 9 p.m. Monday, Sept. 14 – 5 a.m. Friday, Sept. 18.”
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The closures include northbound lanes from milepost 12.5 to 13.8“405 [1 mi from Eastside]: Up to four lanes of northbound I-405 from milepost 12.5 to milepost 13.8 will be closed nightly, 9 p.m. Monday, Sept. 14 – 4:30 a.m. Friday, Sept. 18.”
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Additional closures will affect southbound lanes from milepost 11 to 8.5“405 [3 mi from Eastside]: Up to two lanes of southbound I-405 from (I-90) milepost 11 to milepost 8.5 will be closed nightly, 10:30 p.m. Monday, Sept. 14 – 5 a.m. Friday, Sept. 18.”
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Additional closures will affect northbound lanes from milepost 10.5 to 11No usable supporting receipt — unverified.
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Additional closures will affect the northbound off-ramp to westbound I-90No usable supporting receipt — unverified.
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Additional closures have signed detours in place“A signed detour will be in place.”
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A separate closure of the northbound I-405 off-ramp to Coal Creek Parkway Southeast will run from Sept. 18 at 11:30 p.m.“405 [3 mi from Eastside]: The northbound I-405 off-ramp to Coal Creek Parkway Southeast will be closed day and night, 11:30 p.m. Friday, Sept. 18 – 4 a.m. Monday, Sept. 21. Signed detours will be in place.”
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A separate closure of the northbound I-405 off-ramp to Coal Creek Parkway Southeast will run until Sept. 21 at 4 a.m.“405 [3 mi from Eastside]: The northbound I-405 off-ramp to Coal Creek Parkway Southeast will be closed day and night, 11:30 p.m. Friday, Sept. 18 – 4 a.m. Monday, Sept. 21. Signed detours will be in place.”
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WSDOT's public records indicate construction work will occur overnight“The northbound I-405 off-ramps to Northeast Fourth Street / Northeast Eighth Street will be closed nightly, 10 p.m. Monday, Sept. 14 – 4:30 a.m. Friday, Sept. 18. A signed detour will be in place.”
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The construction work will occur during the specified hours“The northbound I-405 off-ramps to Northeast Fourth Street / Northeast Eighth Street will be closed nightly, 10 p.m. Monday, Sept. 14 – 4:30 a.m. Friday, Sept. 18. A signed detour will be in place.”
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Detours are signed“A signed detour will be in place.”