Infrastructure

I-405, SR 9 closures continue in Tacoma

Thursday, August 27, 2026

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I-405 will see multiple lane closures from Friday, Aug. 28 through Monday, Aug. 31. Northbound lanes will close from Northeast 70th Place to Northeast 85th Street and from Northeast 85th Street on-ramp to Northeast 100th Street, with signed detours in place. Southbound HOV lane will close nightly from Aug. 24–28.

SR 9 near Kalloch Road (MP 59) will remain reduced to a single lane until Sept. 14 for fish passage construction. Alternate traffic signals will also be in place on SR 9 near Mount Vernon Big Lake Road (MP 49) through Sept. 3. Drivers should expect delays in these areas during construction hours.

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

Source receipts9 of 10 claims supported · 90%

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I-405 will see multiple lane closures from Friday, Aug. 28 through Monday, Aug. 31“405: Up to three lanes of northbound I-405 will close from the Northeast 85th Street on-ramp to Northeast 100th Street from 11 p.m. Friday Aug. 28 to 4 a.m. Monday, Aug. 31. A signed detour will be in place.”
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Northbound lanes will close from Northeast 70th Place to Northeast 85th Street“405: All lanes of northbound I-405 will close from Northeast 70th Place to Northeast 85th Street from 11 p.m. Friday Aug. 28 to 4 a.m. Monday, Aug. 31. A signed detour will be in place.”
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Northbound lanes will close from Northeast 85th Street on-ramp to Northeast 100th Street“405: Up to three lanes of northbound I-405 will close from the Northeast 85th Street on-ramp to Northeast 100th Street from 11 p.m. Friday Aug. 28 to 4 a.m. Monday, Aug. 31. A signed detour will be in place.”
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Signed detours will be in place“A signed detour will be in place.”
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Southbound HOV lane will close nightly from Aug. 24–28“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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SR 9 near Kalloch Road (MP 59) will remain reduced to a single lane until Sept. 14“009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 42 days, until Sept. 14 for fish passage construction.”
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Fish passage construction is the reason for the lane reduction on SR 9 near Kalloch Road (MP 59)“009: SR 9 is reduced to a single lane near Kalloch Road (MP 59) with a signal alternating northbound and southbound traffic through a bypass road for 42 days, until Sept. 14 for fish passage construction. Expect delays in the area.”
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Alternate traffic signals will be in place on SR 9 near Mount Vernon Big Lake Road (MP 49)No usable supporting receipt — unverified.
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Alternate traffic signals will be in place on SR 9 near Mount Vernon Big Lake Road (MP 49) through Sept. 3“009: Northbound and southbound traffic will alternate from 10 a.m. to 4 p.m. daily Mondays through Thursday through Thursday, Sept. 3, just south of Mount Vernon Big Lake Road (milepost 49) for fish passage construction. Expect delays in the area.”
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Drivers should expect delays in these areas during construction hours“Travelers on SR 20 near Loup Loup Pass will encounter slowdowns and delays while contractor crews perform pavement repairs and paving throughout the pass Mondays to Thursdays from 6 a.m. to 8 p.m. until Aug. 27. Expect alternating, one-lane, two-way traffic, automatic flaggers, temporary rumble strips and reduced speed limits.”