Infrastructure

I-405, I-90 closures for overnight work

Tuesday, September 1, 2026

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I-405 and I-90 will see overnight lane closures in Tacoma starting Thursday night through Friday morning, according to Washington State Department of Transportation (WSDOT) records. The closures include up to two lanes of southbound I-405 from milepost 12 to Coal Creek Parkway Southeast, and the eastbound I-90 off-ramp to Factoria Boulevard. Both will be closed from 9 p.m. Thursday, Sept. 3, to 5 a.m. Friday, Sept. 4. Additional closures include northbound I-405 lanes between mileposts 11. 5 and 13. 7, and the right lane of northbound SR 527 at I-405 ramps. WSDOT notes that signed detours will be in place for the I-90 off-ramp closure, and drivers should expect delays during the overnight work periods. The closures are part of ongoing highway maintenance and construction projects that will continue through September.

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

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I-405 and I-90 will see overnight lane closures in TacomaNo usable supporting receipt — unverified.
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The closures will start starting Thursday night through Friday morningNo usable supporting receipt — unverified.
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The closures are according to Washington State Department of Transportation (WSDOT) recordsNo usable supporting receipt — unverified.
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The closures include up to two lanes of southbound I-405 from milepost 12 to Coal Creek Parkway Southeast“405: Up to two lanes of southbound I-405 from milepost 12 to Coal Creek Parkway Southeast (milepost 10) will be closed overnight, 9 p.m. Thursday, Sept. 3 – 5 a.m. Friday, Sept. 4.”
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The closures include the eastbound I-90 off-ramp to Factoria Boulevard“090: The eastbound I-90 off-ramp to Factoria Boulevard will be closed nightly, 9 p.m. Monday, Aug. 31 – 5 a.m. Friday, Sept. 4. A signed detour will be in place.”
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Both closures will be closed from 9 p.m. Thursday, Sept. 3, to 5 a.m. Friday, Sept. 4No usable supporting receipt — unverified.
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Additional closures include northbound I-405 lanes between mileposts 11.5 and 13.7“405: Up to four lanes of northbound I-405 from milepost 11.5 to milepost 13.7 will be closed nightly, 9:30 p.m. Monday, Aug. 31 – 4:30 a.m. Friday, Sept. 4.”
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Additional closures include the right lane of northbound SR 527 at I-405 ramps“527: The right lane of northbound SR 527 at the I-405 ramps (milepost 2.6 to milepost 2.95) will be closed overnight from 11:59 p.m. Monday, Aug. 31 to 5 a.m. Tuesday, Sept. 1.”
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WSDOT notes that signed detours will be in place for the I-90 off-ramp closure“090: The eastbound I-90 off-ramp to Factoria Boulevard will be closed nightly, 9 p.m. Monday, Aug. 31 – 5 a.m. Friday, Sept. 4. A signed detour will be in place.”
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Drivers should expect delays during the overnight work periods“Up to two lanes of southbound I-405 from milepost 12 to Coal Creek Parkway Southeast (milepost 10) will be closed overnight, 9 p.m. Thursday, Sept. 3 – 5 a.m. Friday, Sept. 4.”
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The closures are part of ongoing highway maintenance and construction projectsNo usable supporting receipt — unverified.
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The highway maintenance and construction projects will continue through SeptemberNo usable supporting receipt — unverified.