Infrastructure

I-405, SR 527 closures begin July 27

Tuesday, July 28, 2026

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Starting Monday, July 27, WSDOT will implement nightly lane closures on I-405 and SR 527, with additional roadwork on SR 203, SR 96, SR 9, and the SR 536 bridge. The most significant closures include two lanes of southbound I-405 between mileposts 18. 11 and 16. 45 nightly from 11 p.m. to 4 a.m. until July 31.

SR 527 will see multiple nightly closures including the center lane southbound from 214th Street Southeast to I-405 and the right lane at 220th Street Southeast, both running from 9 p.m. to 3 a.m. through July 31. The SR 536 Skagit River Bridge will have intermittent sidewalk closures daily from 7 a.m. to 7 p.m. with shuttle service available during closures.

WSDOT states the projects are for paving, utility work, and bridge maintenance. Residents should plan for potential delays on these routes during the specified times.

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

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Starting Monday, July 27, WSDOT will implement nightly lane closures on I-405 and SR 527“405: Monday, July 27 to the morning of Friday, July 31: Up to two lanes of southbound I-405 between milepost 18.11 and milepost 16.45 will be closed, nightly from 11 p.m. – 4 a.m.”
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Additional roadwork will be conducted on SR 203, SR 96, SR 9, and the SR 536 bridgeNo usable supporting receipt — unverified.
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Two lanes of southbound I-405 between mileposts 18. 11 and 16. 45 will have nightly closures“405: Monday, July 27 to the morning of Friday, July 31: Up to two lanes of southbound I-405 between milepost 18.11 and milepost 16.45 will be closed, nightly from 11 p.m. – 4 a.m.”
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The closures on southbound I-405 will run from 11 p.m. to 4 a.m.“405: Monday, July 27 to the morning of Friday, July 31: Up to two lanes of southbound I-405 between milepost 18.11 and milepost 16.45 will be closed, nightly from 11 p.m. – 4 a.m.”
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The closures on southbound I-405 will last until July 31“405: Monday, July 27 to the morning of Friday, July 31: Up to two lanes of southbound I-405 between milepost 18.11 and milepost 16.45 will be closed, nightly from 11 p.m. – 4 a.m.”
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SR 527 will see multiple nightly closures“527: The center lane of southbound SR 527 from 214th Street Southeast to the southbound I-405 off-ramp will be closed nightly from 9 p.m. Monday, July 27 to 12 a.m. Thursday, July 30. 527: The right lane of southbound SR 527 at 220th Street Southeast will be closed nightly from 9 p.m. Monday, July 27 to 3 a.m. Friday, July 31.”
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The center lane southbound on SR 527 from 214th Street Southeast to I-405 will have nightly closures“527: The center lane of southbound SR 527 from 214th Street Southeast to the southbound I-405 off-ramp will be closed nightly from 9 p.m. Monday, July 27 to 12 a.m. Thursday, July 30.”
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The right lane on SR 527 at 220th Street Southeast will have nightly closures“527: The right lane of southbound SR 527 at 220th Street Southeast will be closed nightly from 9 p.m. Monday, July 27 to 3 a.m. Friday, July 31.”
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The closures on SR 527 will run from 9 p.m. to 3 a.m.“527: The right lane of southbound SR 527 at 220th Street Southeast will be closed nightly from 9 p.m. Monday, July 27 to 3 a.m. Friday, July 31.”
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The closures on SR 527 will last through July 31“527: The right lane of southbound SR 527 at 220th Street Southeast will be closed nightly from 9 p.m. Monday, July 27 to 3 a.m. Friday, July 31.”
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The SR 536 Skagit River Bridge will have intermittent sidewalk closures daily“536: Beginning as early as Tuesday, July 28, expect intermittent closures of the sidewalk over the SR 536 Skagit River Bridge to pedestrians, bicyclists and people using mobility devices between 7 a.m. and 7 p.m. daily. When the sidewalk is closed, a free, ADA-complaint shuttle service will be available, with pickup locations on both sides of the river.”
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The sidewalk closures on SR 536 Skagit River Bridge will run from 7 a.m. to 7 p.m.“Beginning as early as Tuesday, July 28, expect intermittent closures of the sidewalk over the SR 536 Skagit River Bridge to pedestrians, bicyclists and people using mobility devices between 7 a.m. and 7 p.m. daily.”
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Shuttle service will be available during the sidewalk closures on SR 536 Skagit River Bridge“When the sidewalk is closed, a free, ADA-complaint shuttle service will be available, with pickup locations on both sides of the river.”
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WSDOT states the projects are for paving, utility work, and bridge maintenance“203: From 7 p.m. to 6 a.m. Sunday nights through Friday mornings beginning Monday, July 27, one lane of State Route 203 will be closed for a paving project between just south of Duvall to the Monroe city limits (mileposts 12.53 to 23.20). Flaggers and pilot cars will direct alternating traffic through the remaining open lane.”
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Residents should plan for potential delays on these routes during the specified timesNo usable supporting receipt — unverified.