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Northbound I-405 closure this weekend in Bellevue

WSDOT will close northbound I-405 in downtown Bellevue this weekend beginning Friday, September 30, to complete construction of new multi-level "braided' ramps to separate vehicles entering and exiting northbound I-405 between NE 8th Street and SR 520 in Bellevue.

Here's a diagram of how the "braided" ramps work to separate traffic. This project will add a bypass lane for I-405 traffic headed eastbound to SR 520. A new ramp from the NE 10th Street overpass will give drivers direct access to SR 520 from downtown Bellevue. 

This is WSDOT's second attempt at the weekend closure. Again, the closure of I-405 this weekend is weather dependent however. It will be decided Friday morning if the weekend work will go forward based on the weather forecast. If sufficient rain is predicted, they plan to call off the closure. [Updated 9/30 10:28am: It's a go! NB I-405 in Bellevue is closing this weekend 11pm Friday to 4am Monday.]

Closure information
During the weekend closure, drivers should plan extra time into their schedules and expect delays on detour routes around Bellevue.

  • Northbound I-405 will close from NE 8th Street to SR 520 from 11pm Friday, Sep. 30, to 4am Monday, Oct. 4.
  • Several northbound ramps in Bellevue will close and signed detours will be in place.
  • Southbound I-405 will be open to traffic all weekend.
  • Bellevue is open for business during the northbound freeway closure. Northbound exit ramps will be open as far north as NE 8th Street. 

When I-405 reopens
Crews will unveil the new ramps when the freeway opens Monday morning--nine months ahead of schedule.

New signs in and around Bellevue will direct drivers to SR 520 and I-405 using the new ramps:

  • Drivers going to SR 520 will use NE 10th Street. The new ramp will take vehicles directly to east- and westbound SR 520. Eastside drivers will no longer have access to SR 520 from NE 8th Street.
  • Drivers going to I-405 will continue to use NE 8th Street but will use a new ramp to reach northbound I-405.
  • Northbound I-405 drivers should prepare to exit to SR 520 nearly one-half mile earlier than the current exit point. 

For more information, visit WSDOT.

Published: September 29, 2011
Photos and images © WSDOT


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