Southbound I-405 Weekend Closure: April 24-27

Published on April 22, 2026

Southbound-I-405-Closure-graphic-in-gray-with-I405-in-the-background.png

The Washington State Department of Transportation (WSDOT) has scheduled a full closure of southbound Interstate 405 from State Route (SR) 169 to SR 167 beginning 11:59 p.m. Friday, April 24, to 4 a.m. Monday, April 27.

WSDOT crews will install drainage, replace concrete pavement panels and pave the roadway, as part of the I-405/Renton to Bellevue Widening and Express Toll Lanes Project.

 

2026-04-24 to 04-27 Southbound I405 closure detour and closure map

SB I-405 closure details 

The following ramps will be closed:

  • SR 169/SR 900 on-ramp to southbound I-405
  • Southbound I-405 off-ramp to SR 515/Talbot Road South (Exit 3)
  • Southbound I-405 off-ramp to southbound SR 167/Auburn/Rainier Avenue South (Exit 2)
  • Southbound I-405 HOV ramp to SR 167 

The southbound I-405 off-ramp to SR 169/SR 900 (Exit 4) will remain open.

A signed detour route will be in place.

Travelers are also advised of a full eastbound SR 18 closure for paving work from Thursday, April 23 to Monday, April 27, as part of the I-90 – SR 18 Interchange Improvements project.

“Know before you go," travel during off-peak hours or, if possible, delay discretionary travel to help minimize backups.

Work is dependent on good weather and may be rescheduled. I-405 schedule updates will be available on the project webpage, WSDOT’s Travel Center map, the WSDOT mobile app and by signing up for King County email updates.

Find other traffic impacts in Renton at rentonwa.gov/trafficmap. 

Contact WSDOT

Phone

Craig Smiley, I-405/SR 167 Program Communications
425-417-9658

 

24-Hour Construction Hotline
425-818-0161

 

 

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