September 25 → September 28 2026

Southbound I-405 full closure from Bellevue to Renton

Date: Sept. 25-28
Time: 11:30 p.m. Friday to 4 a.m. Monday
Activity details: Crews will close the southbound Interstate 405 in Renton and Bellevue will close from Coal Creek Parkway Southeast to North Southport Drive/Northeast Sunset Boulevard.
Impact type: All weekend
Description: Crews will excavate drainage crossings, complete full pavement replacements, and complete a traffic switch.
Traffic: Anticipate traffic delays on southbound I-405 approaching the closure. Detour routes cannot handle typical traffic volumes.
Contact the project hotline: 425-818-0161

September 25 → September 28 2026

I-405/Northeast 132nd Street interchange closure in Kirkland

Date: Sept. 25-28
Time: 10 p.m. Friday to 5 a.m. Monday
Activity details: Crews will close the Northeast 132nd Street on-ramp to northbound I-405 and southbound I-405 off-ramp (Exit 21) to Northeast 132nd Street. Northeast 132nd Street under I-405 will also close.
Impact type: All weekend
Description: Crews will conduct warranty work for the I-405/Northeast 132nd Street Interchange Project.
Traffic: Anticipate traffic delays on local streets in Kirkland approaching the closure. Detour routes cannot handle typical traffic volumes.
Contact the project hotline: 425-224-2423

October 02 → October 05 2026

I-405/Northeast 85th Street interchange closure in Kirkland

Date: Oct. 2-5
Time: 10 p.m. Friday to 5 a.m. Monday
Activity details: Crews will close the northbound/southbound I-405 ramps (Exit 18) and Northeast 85th Street from Sixth Street South to 120th Avenue Northeast.
Impact type: All weekend
Description: Crews will prepare Northeast 85th Street for paving.
Traffic: Anticipate traffic delays on local streets in Kirkland approaching the closure. Detour routes cannot handle typical traffic volumes.
Contact the project hotline: 425-224-2423

October 02 → October 05 2026

CANCELED - Southbound I-405 lane reductions and Northeast Eighth Street on-ramp closure

Note: This closure will be rescheduled to a later date.

Date: Oct. 2-5
Time: 11:30 p.m. Friday to 4 a.m. Monday
Activity details: Crews will close up to two lanes on southbound I-405 and the Northeast Eighth Street on-ramp to southbound I-405 in Bellevue.
Impact type: All weekend
Description: TBD
Traffic: Anticipate traffic delays on southbound I-405 and local streets in Bellevue approaching the closure. Detour routes cannot handle typical traffic volumes.
Contact the project hotline: 425-224-2423

October 03 → October 04 2026

Southbound I-405 lane reductions in Tukwila

Date: Oct. 3-4
Time: 7 p.m. Saturday to 1:30 p.m. Sunday
Activity details: Crews will close up to two lanes of southbound I-405 in Tukwila from SR 181 to the I-5/SR 18 interchange.
Impact type: Saturday to Sunday
Description: Crews will conduct paving.
Traffic: Anticipate traffic delays on southbound I-405 in Tukwila approaching the closure. Travelers are advised of delays to Seattle-Tacoma International Airport.
Contact the project hotline: 425-354-3232

October 09 → October 12 2026

Southbound I-405 closure in Bothell

Date: Oct. 9-12
Time: 10 p.m. Friday to 4 a.m. Monday
Activity details: Crews will close southbound I-405 in Bothell from SR 527 to SR 522.
Impact type: All weekend
Description: Crews will install sign bridge structures.
Traffic: Anticipate traffic delays on southbound I-405 in Bothell approaching the closure. Detour routes cannot handle typical traffic volumes.
Contact the project hotline: 425-354-3232