Infrastructure

I-405 Southbound Closure, Aug. 21-24

Friday, August 21, 2026

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Southbound I-405 will be fully closed from Coal Creek Parkway Southeast to North 30th Street from 11:30 p.m. Friday, Aug. 21, to 4 a.m. Monday, Aug. 24, according to WSDOT. A signed detour will be in place during the closure. The closure affects drivers traveling south on I-405 during the weekend. WSDOT states the closure is for construction work, with no additional details provided. The detour will be signed to guide drivers around the closed section. The closure is scheduled to end at 4 a.m. Monday, Aug. 24, with all lanes expected to reopen by that time.

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

Source receipts7 of 8 claims supported · 88%

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Southbound I-405 will be fully closed from Coal Creek Parkway Southeast to North 30th Street“405: All lanes of southbound I-405 from Coal Creek Parkway Southeast to North 30th Street will be fully closed day and night, 11:30 p.m. Friday, Aug. 21 – 4 a.m. Monday, Aug. 24. Signed detours will be in place.”
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The closure will start at 11:30 p.m. Friday, Aug. 21“405: All lanes of southbound I-405 from Coal Creek Parkway Southeast to North 30th Street will be fully closed day and night, 11:30 p.m. Friday, Aug. 21 – 4 a.m. Monday, Aug. 24. Signed detours will be in place.”
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The closure will end at 4 a.m. Monday, Aug. 24“405: All lanes of southbound I-405 from Coal Creek Parkway Southeast to North 30th Street will be fully closed day and night, 11:30 p.m. Friday, Aug. 21 – 4 a.m. Monday, Aug. 24. Signed detours will be in place.”
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All lanes are expected to reopen by 4 a.m. Monday, Aug. 24“405: All lanes of southbound I-405 from Coal Creek Parkway Southeast to North 30th Street will be fully closed day and night, 11:30 p.m. Friday, Aug. 21 – 4 a.m. Monday, Aug. 24. Signed detours will be in place.”
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A signed detour will be in place during the closure“Signed detours will be in place.”
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The closure affects drivers traveling south on I-405 during the weekendNo usable supporting receipt — unverified.
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The closure is for construction work“405: All lanes of southbound I-405 from Coal Creek Parkway Southeast to North 30th Street will be fully closed day and night, 11:30 p.m. Friday, Aug. 21 – 4 a.m. Monday, Aug. 24. Signed detours will be in place.”
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WSDOT states the closure is for construction work“405: All lanes of southbound I-405 from Coal Creek Parkway Southeast to North 30th Street will be fully closed day and night, 11:30 p.m. Friday, Aug. 21 – 4 a.m. Monday, Aug. 24. Signed detours will be in place.”