Seattle Tunnel Partners, as WSDOT's design-build contractor for the tunnel project, is responsible for the project schedule. Based on STP's most recent schedule, the tunnel could open to drivers as soon as fall 2018. WSDOT's goal is to safely open the tunnel to traffic as quickly as possible, but it’s too early to accurately predict a tunnel opening date. A significant amount of work remains before tunnel opening. Safety and quality remain our top priorities, and will continue to guide all work on the program.