Plan ahead for a full weekend closure of southbound I-405 in Bothell, Oct. 9-12

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10/05/2026 12:10 PM PDT

BOTHELL – All lanes of southbound Interstate 405 will close the weekend of Oct. 9-12 in Bothell, as crews working for the Washington State Department of Transportation continue work on the I-405/Brickyard to SR 527 Improvement Project. People traveling southbound throughout the region should expect heavier traffic and longer travel times on southbound I-5 and through Bothell, as drivers shift their routes during the closure.