• Provides direct access between manufacturing and warehousing businesses that export goods and the Port of Seattle, enhancing our state’s economic competitiveness both nationally and globally.

• Studies show the project will save motorists and truckers 11 minutes or more on trips in and around the seaport and Green River Valley.

• Saves airport travelers from the south (one-third of all airport travelers) roughly 10 minutes per trip by providing new access.

• Provides critical new capacity on I-5 by adding 18.5 new lane miles.

• No other project comes close to providing this level of new capacity on I-5.

• Fully connects SR 509 to I-5, expanding access into Sea-Tac International Airport, serving increased traffic and future terminal expansion.

• Allows for a new direct connection from the airport area to the Alaskan Way Viaduct.

• Creates a direct freeway connection to the Green River Valley at 228th Street.

• Includes a new exit that provides direct connections with Sound Transit light rail station.

• WSDOT determined that the benefit-cost ratio of the project is 5-to-1, making it one of the best returns on investment of any large project.

    Port of Seattle image by Don Wilson