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I-405 - NE 6th to I-5 Widening and Express Toll Lanes - Noise Walls

As part of the I-405 Bellevue to Lynnwood Widening and Express Toll Lanes project, contractor crews built seven new noise walls and one new noise berm, as well as relocated one existing wall in the project area.

The list below contains PDF flyers of noise wall construction information by location.



Sample noise wall

The new noise walls are concrete with an ashlar stone finish, similar to the wall in this photo.

Along southbound I-405:

Along northbound I-405:

What's the process for getting a noise wall?
WSDOT's noise wall page
has more information about how, when and why we install noise walls for projects.

Appendix L of the Bellevue to Lynnwood Environmental Assessment provides detailed information on the noise study conducted for this project and evaluation process for new noise walls.