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● LIVE Updated 1h ago · 11 sources tracked

Puget Sound road closures to snarl I-5, I-405, SR 520 and SR 99 through Monday

Drivers across the greater Puget Sound region face severe traffic disruptions and significant delays due to major highway closures and lane reductions affecting I-5, I-405, SR 520, and SR 99 through Monday. Travelers heading to Seattle-Tacoma International Airport must prepare for longer and less predictable trips. Additional closures include Tacoma-area I-5 lane restrictions tied to a $64 million project, pain at the Ship Canal Bridge, and upcoming southbound I-405 closures in Bothell scheduled for October 9 through 12.

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⚡ Key Developments & Real-Time Context
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  • ✓ Major construction closures and lane reductions affect I-5, I-405, SR 520, and SR 99 across the Puget Sound region through Monday.
  • ✓ Travelers across the greater Puget Sound region and those headed to Seattle-Tacoma International Airport face longer and less predictable trips.
  • ✓ Tacoma-area I-5 lane closures this weekend are part of a $64 million project.
  • ✓ All lanes of southbound Interstate 405 will close in Bothell the weekend of October 9-12 for work on the I-405/Brickyard to SR 527 Improvement Project.
🛡️ Source Corroboration: 11 independent reporting domains (100% confidence) ⏱ Read time: ~2 min

What changed

WSDOT announced a full weekend closure of southbound Interstate 405 in Bothell for October 9 through 12 as part of the ongoing improvement project.

Live updates

  1. Puget Sound Road Closures Snarl Major Washington Highways

    Drivers across the greater Puget Sound region face severe traffic disruptions and significant delays due to major highway closures and lane reductions affecting I-5, I-405, SR 520, and SR 99 through Monday. Travelers heading to Seattle-Tacoma International Airport must prepare for longer and less predictable trips. Additional closures include Tacoma-area I-5 lane restrictions tied to a $64 million project, pain at the Ship Canal Bridge, and upcoming southbound I-405 closures in Bothell scheduled for October 9 through 12.

    Why it matters

    Major construction projects and infrastructure improvements across western Washington routinely trigger weekend lane reductions, ramp closures, and full highway shutdowns. The Washington State Department of Transportation manages these events to execute critical corridor upgrades, such as the I-405/Brickyard to SR 527 Improvement Project. Motorists frequently shift routes during these intervals, generating heavy congestion on alternative pathways throughout the regional network.

    What is confirmed

    • Major construction closures and lane reductions affect I-5, I-405, SR 520, and SR 99 across the Puget Sound region through Monday.
    • Travelers across the greater Puget Sound region and those headed to Seattle-Tacoma International Airport face longer and less predictable trips.
    • Tacoma-area I-5 lane closures this weekend are part of a $64 million project.
    • All lanes of southbound Interstate 405 will close in Bothell the weekend of October 9-12 for work on the I-405/Brickyard to SR 527 Improvement Project.

    Still unconfirmed

    • Traffic pattern changes at Exit 39 are causing traffic jams for Howard Frankland drivers in Tampa.

    What to watch next

    • Southbound Interstate 405 closure in Bothell from October 9 to October 12
    • Post-weekend traffic recovery reports from WSDOT across I-5, I-405, SR 520, and SR 99
    Sources used for this update (12)
    1. baynews9.com — Traffic pattern changes causing headaches for Howard Frankland drivers
    2. KOMO — Puget Sound road closures to snarl I-5, I-405, SR 520 and SR 99 through Monday
    3. The Seattle Times — Weekend traffic forecast calls for pain at Ship Canal Bridge
    4. MyNorthwest.com — Drivers brace for major closures on I-5, I-405, SR 520 and SR 99 this weekend
    5. Tacoma News Tribune — Tacoma-area I-5 lane closures this weekend are part of $64 million project
    6. KIRO 7 News Seattle — Weekend Traffic Wrap-Up: Multiple highway closures, lane reductions to impact drivers this weekend
    7. komonews.com — Puget Sound road closures to snarl I-5, I-405, SR 520 and SR ...
    8. www.fox13seattle.com — Weekend traffic nightmare: I-5, I-405, SR 520 closures hit WA
    9. biztoc.com — Puget Sound road closures to snarl I-5, I-405, SR 520 and SR ...
    10. www.yahoo.com — TRAFFIC: Multiple highway closures, lane reductions ... - Yahoo
    11. wsdot.wa.gov — News | WSDOT
    12. wsdot.wa.gov — Plan ahead for a full weekend closure of southbound I-405 in Bothell, Oct. 9-12
    confidence 100%
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