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Additional Review of the Impacts of Deep Bored Tunnel Tolling Diversion on City Streets; Identification of Mitigation

This report is intended to provide supplemental analysis of the Alaskan Way Viaduct Replacement Project (AWVRP) from the perspective of the City of Seattle, the jurisdiction that will realize a majority of the project’s benefits or impacts. It comes in response to the Alaskan Way Viaduct Replacement Project 2010 Supplemental Draft Environmental Impact Statement (AWVRP 2010 SDEIS) findings. The SDEIS finds that between 50% and 55% of traffic projected to use a deep bored tunnel would divert back to city surface streets and I-5 when tolls are assessed at levels needed to cover $400 million in revenue bonds.

  • Executive Summary: Click here to read the report’s executive summary.

  • Full ReportClick here to read the full report (report plus appendices) 

  • Report onlyClick here.

  • Appendices onlyClick here.


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