210850 - I-405 NE 8th to SR520 Braided Ramps

March 2010

This project received $80 million in stimulus funding from the 2009 American Recovery and Reinvestment Act (ARRA). The funding advanced delivery to the public by approximately one year.

WSDOT, along with prime contractor Guy F. Atkinson Construction, LLC and KLB Construction will build 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.

Why is WSDOT building this project?
This area experiences up to eight hours of traffic congestion a day. The new improvements will reduce congestion on I-405 caused by northbound traffic exiting to SR 520 and entering from NE Eighth Street. The project also eliminates weave congestion on SR 520 between traffic entering from I-405 and exiting to 124th Avenue NE.

The End Result
The completion of this project improves safety by eliminating traffic weaves for motorists on northbound I-405 and eastbound SR 520 between NE Eighth Street and 124th Avenue NE.

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PO Box 158, Mukilteo, WA 98275  •  (425) 355-7335  •  Site by Jon Raasch