Infrastructure

I-405 and US 12 Work Scheduled

Wednesday, August 19, 2026

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WSDOT will close lanes on I-405 and US 12 starting Monday, August 17, through Friday, August 21, for construction and repairs.

The left express toll lane of northbound I-405 will close nightly from 8:30 p.m. to 5 a.m. between Northeast 160th Street and SR 527. Southbound I-405 will close up to three lanes nightly from 10:30 p.m. to 5:30 a.m. from August 17 to 19. US 12 over I-5 will close a single lane nightly from 7:30 p.m. to 6 a.m. for bridge repairs, with a detour using I-5 and SR 508.

Residents should expect delays during these closures. The US 12 detour requires taking northbound I-5 to Exit 71 for SR 508, then southbound back to US 12. WSDOT advises travelers to 'slow down, stay focused and expect delays.'

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

Source receipts7 of 10 claims supported · 70%

Legacy automated check: the original source text was not preserved. These earlier verdicts have not passed the current publication checks and may contain errors. Source: original document ↗

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WSDOT will close lanes on I-405 and US 12 starting Monday, August 17No usable supporting receipt — unverified.
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WSDOT will close lanes on I-405 and US 12 through Friday, August 21No usable supporting receipt — unverified.
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The left express toll lane of northbound I-405 will close nightly from 8:30 p.m. to 5 a.m.“405: The left express toll lane of northbound I-405 between Northeast 160th Street (milepost 22.61) and SR 527 (milepost 27.1) will be closed nightly from 8:30 p.m. Monday, August 17 to 5 a.m. Friday, August 21.”
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The left express toll lane of northbound I-405 will close between Northeast 160th Street and SR 527“405: The left express toll lane of northbound I-405 between Northeast 160th Street (milepost 22.61) and SR 527 (milepost 27.1) will be closed nightly from 8:30 p.m. Monday, August 17 to 5 a.m. Friday, August 21.”
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Southbound I-405 will close up to three lanes nightly from 10:30 p.m. to 5:30 a.m.“405: Up to three lanes of southbound I-405 from Coal Creek Parkway Southeast (milepost 9.5) to milepost 7 will be closed nightly, 10:30 p.m. Monday, Aug. 17 – 5:30 a.m. Wednesday, Aug. 19.”
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Southbound I-405 will close up to three lanes nightly from August 17 to 19“405: Up to three lanes of southbound I-405 from Coal Creek Parkway Southeast (milepost 9.5) to milepost 7 will be closed nightly, 10:30 p.m. Monday, Aug. 17 – 5:30 a.m. Wednesday, Aug. 19.”
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US 12 over I-5 will close a single lane nightly from 7:30 p.m. to 6 a.m.“012: From 7:30 p.m. Monday, Aug. 10 to 6 a.m. Thursday, Aug. 20: A single lane of US 12 over I-5 (milepost 66.5) will close nightly for bridge repairs.”
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US 12 over I-5 will close a single lane nightly for bridge repairs“012: From 7:30 p.m. Monday, Aug. 10 to 6 a.m. Thursday, Aug. 20: A single lane of US 12 over I-5 (milepost 66.5) will close nightly for bridge repairs.”
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The US 12 detour requires taking northbound I-5 to Exit 71 for SR 508“Flaggers will direct travelers to a signed detour using northbound I-5 to Exit 71 for SR 508, then southbound back to US 12.”
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The US 12 detour requires taking southbound I-5 back to US 12No usable supporting receipt — unverified.