Tolling the SR 99 Tunnel
Funding for the $3.2 billion viaduct replacement program comes from state, federal and local sources as well as the Port of Seattle and tolls on drivers using the tunnel. Of that total cost, the 2012 Legislature stated $200 million should come from toll funding. Tolls could also pay for future tunnel operations and maintenance costs, similar to other toll facilities in Washington. Tolling of the SR 99 tunnel is anticipated to begin after the tunnel opens to drivers.
Setting toll rates
Studying toll rates
WSDOT and the City of Seattle established the 15-member Advisory Committee on Tolling and Traffic Management in fall 2011.
In 2014, the committee made advisory recommendations on strategies for tolling the SR 99 tunnel to raise revenue while minimizing and mitigating traffic diversion onto city streets and I-5. These recommendations were shared with the Governor, Legislature, State Transportation Commission, WSDOT, Seattle Mayor and the Seattle City Council.
Appendices (pdf 1.8 MB)
In summer 2016, WSDOT commissioned an independent traffic analysis firm to conduct a traffic and revenue study that will inform the toll rate setting process. Learn more about the study at WSDOT's Tolling page
Electronic toll collection
Tolls would be collected electronically; there would be no toll booths. For more information about WSDOT’s electronic toll collection system, visit the Good To Go! web page.