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SR 520 - West Approach Bridge North Project Corridor Connections

What are key connection changes in the Montlake area?

The West Approach Bridge North (WABN) project will enhance connections in the Montlake area.

Below are several engineering plans that provide additional detail on the Montlake section of the WABN project.


Existing structures that will be removed

Existing structures that will be removed and roadway realignment


High-level overview of new structures compared to existing structures that will be reconfigured

High-level overview of new west approach bridge north structures

As shown above, westbound traffic would travel on new structures, while eastbound traffic would use the existing roadway. The 24th Avenue East bridge would be reconfigured for southbound traffic only, and would be used as a westbound off-ramp.


How will the West Approach Bridge North connect with other planned SR 520 projects?

The construction schedule for WABN is carefully timed to coincide with activities for both the new floating bridge and the west connection bridge:  

Step 1 - Floating Bridge: Work on the new floating bridge is already under way on Lake Washington.

Step 1 - Floating bridge: Work on the new floating bridge is already under way on Lake Washington.

Step 2 - West Connection Bridge: Construction is underway on a structure that will connect the new floating bridge to the existing west approach bridge.

Step 2 - West connection bridge: In 2013 we began building a structure that will connect the new floating bridge to the existing west approach bridge.

Step 3 - West Approach Bridge North: Starting in fall 2014, we will start work on the WABN. When WABN is complete, westbound traffic will travel on the new structure while eastbound traffic will travel on the existing west approach and the West Connection Bridge.

Step 3 - West approach bridge north: Starting in summer 2014, we will start work on the West Approach Bridge North (WABN).