Major Weekend Construction Closures Planned for I-5, I-405, and SR 520
Major construction closures are planned for I-5, I-405, and SR 520 this weekend, impacting traffic in the Seattle-Tacoma region.
Seattle Tacoma, WA, October 1, 2026 —
Drivers in the Seattle-Tacoma region should anticipate significant traffic disruptions this weekend due to planned major construction closures affecting key freeways. The Washington State Department of Transportation has announced that Interstate 5 (I-5), Interstate 405 (I-405), and State Route 520 (SR 520) will all experience closures as part of ongoing construction projects.
Specific details regarding the exact timing and duration of these closures were not provided in the initial summary. Commuters are advised to check local traffic advisories for the most up-to-date information closer to the weekend. The closures are expected to impact travel throughout the Seattle-Tacoma metropolitan area, potentially leading to extended commute times and delays for both local and long-distance travelers.
While the specific nature of the construction work was not detailed, major closures on these arterial routes typically involve critical maintenance, paving, bridge work, or infrastructure upgrades. These types of projects are often scheduled for weekends to minimize impact on weekday commuter traffic, but can still cause considerable congestion.
The scope of the closures, including specific ramps or lanes that will be affected on I-5, I-405, and SR 520, was not provided. Travelers planning to use these routes are encouraged to seek alternative transportation methods, such as public transit, carpooling, or to allow for substantially extra travel time. Authorities typically recommend planning travel well in advance of typical departure times or considering delaying non-essential trips during the closure periods.
Story summarized from the original created by Will.Wixey@fox.com (Will Wixey) on www.fox13seattle.com, see more information here.
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