Mercer Island bus-rail connection still in flux

Transit integration at Mercer Island continues to move forward, but rough water appears to be on the horizon. When we last checked in, Sound Transit and King County Metro had presented three infrastructure options, the Limited, Improved, and Optimal Configurations, which could facilitate 12, 16, or 20 buses per hour, respectively. Since that time, the Mercer Island City Council has identified additional concerns and discussed the Interchange again with City staff on July 16, 2019.

Mercer Island Station construction, June 2019. Sound Transit photo, via Facebook.

One of the significant factors is that King County Metro was not a party to the Settlement Agreement that ended litigation and other Link-related disputes between Sound Transit and the City. However Metro’s “concurrence” is required for the Transit Interchange, and the Settlement Agreement allows for changes to the Transit Interchange to achieve that concurrence. As previously reported, Metro identified issues with the Transit Interchange as described in the Settlement Agreement and proposed changes that would allow Metro to concur. Notably, new information presented to the City Council included a letter from King County Metro to Sound Transit (page 16 of the linked PDF) stating that Metro cannot concur with the Limited Configuration (e.g. the configuration explicitly described by the Settlement Agreement, with a capacity of up to 12 buses per hour) because that configuration does not allow appropriate layovers and pickup/dropoff locations.

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Transit Integration at Mercer Island

Sound Transit and King County Metro provided an update to the Mercer Island City Council on East Link’s construction progress on Tuesday, March 19.  The presentation also included information about the future Mercer Island Transit Interchange, which is the new name for the project formerly known colloquially as the bus intercept.

The general concept remains generally similar as previously reported, but at this time Sound Transit and Metro, in coordination with the City of Mercer Island, have made some refinements and identified options for Mercer Island to consider.

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