Infrastructure

SR 405 HOV lane closed nightly until Aug. 28

Thursday, August 27, 2026

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The southbound HOV lane of I-405 will close nightly from 9:30 p.m. Monday, Aug. 24, to 5 a.m. Friday, Aug. 28, according to WSDOT construction updates.

Travelers should expect delays and use alternate routes during these hours. The closure affects the stretch from SR 181 (milepost 1) to I-5 (milepost 0). The I-405 HOV lane closure is part of ongoing construction work. WSDOT expects the closure to end on Aug. 28 at 5 a.m.

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

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The southbound HOV lane of I-405 will close nightly from 9:30 p.m. Monday, Aug. 24“405: The HOV lane of southbound I-405 from SR 181 (milepost 1) to I-5 (milepost 0) will be closed nightly, 9:30 p.m. Monday, Aug. 24 – 5 a.m. Friday, Aug. 28.”
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The southbound HOV lane of I-405 will close nightly to 5 a.m. Friday, Aug. 28“405: The HOV lane of southbound I-405 from SR 181 (milepost 1) to I-5 (milepost 0) will be closed nightly, 9:30 p.m. Monday, Aug. 24 – 5 a.m. Friday, Aug. 28.”
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The closure affects the stretch from SR 181 (milepost 1) to I-5 (milepost 0)“405: The HOV lane of southbound I-405 from SR 181 (milepost 1) to I-5 (milepost 0) will be closed nightly, 9:30 p.m. Monday, Aug. 24 – 5 a.m. Friday, Aug. 28.”
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The I-405 HOV lane closure is part of ongoing construction work“405: The HOV lane of southbound I-405 from SR 181 (milepost 1) to I-5 (milepost 0) will be closed nightly, 9:30 p.m. Monday, Aug. 24 – 5 a.m. Friday, Aug. 28.”
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WSDOT expects the closure to end on Aug. 28 at 5 a.mNo usable supporting receipt — unverified.