Infrastructure

I-405 Southbound Closures Set for Sept. 3-4

Sunday, August 30, 2026

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I-405 southbound traffic will lose up to two lanes from milepost 12 to Coal Creek Parkway Southeast (milepost 10) overnight Thursday, Sept. 3, through Friday, Sept. 4, from 9 p.m. to 5 a.m., according to WSDOT. The closure is part of ongoing highway construction projects.

The work is scheduled to end at 5 a.m. on Friday, Sept. 4. Drivers should expect delays during the overnight closure period. WSDOT advises travelers to plan ahead for potential traffic disruptions.

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

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I-405 southbound traffic will lose up to two lanes from milepost 12 to Coal Creek Parkway Southeast (milepost 10)“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 closure will occur overnight Thursday, Sept. 3, through Friday, Sept. 4“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 closure is scheduled from 9 p.m. to 5 a.m.No usable supporting receipt — unverified.
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The closure is part of ongoing highway construction projectsNo usable supporting receipt — unverified.
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The work is scheduled to end at 5 a.m. on Friday, Sept. 4No usable supporting receipt — unverified.
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Drivers should expect delays during the overnight closure periodNo usable supporting receipt — unverified.
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WSDOT advises travelers to plan ahead for potential traffic disruptionsNo usable supporting receipt — unverified.