an aerial image of a freeway ramp existing the Bay Bridge


In October 2016, the Transportation Authority, in coordination with Caltrans and the Treasure Island Development Authority, opened the new westbound I-80 on- and off-ramps that connect Yerba Buena Island and Treasure Island to the eastern span of the Bay Bridge.

The project improved traffic safety, geometric design, and traffic operations on and near the ramps.

This project is part of an effort to replace and retrofit key roads and on- and off-ramps that connect the I-80 (the highway on the Bay Bridge) and Yerba Buena Island. The Transportation Authority is working jointly with the Treasure Island Development Authority and the Office of Economic and Workforce Development on this effort. These upgrades support the Treasure Island Transportation Program.

This project has received several achievement awards:
  • 2018 Best Project, Highways/Bridges category, Engineering News-Record California 
  • 2017 Interchange Project of the Year, California Transportation Foundation
  • 2017 Transportation Project of the Year (over $50M), Construction Management Association of America, Northern California Chapter
  • 2017 Merit Award, American Council of Engineering Companies
  • 2017 Roadway & Highway Project of the Year, American Society of Civil Engineers (San Francisco Section)
  • 2017 Outstanding Construction Project of the Year, American Society of Civil Engineers (Region 9)


Cost & Funding 

The I-80 East Side Ramps project cost $100,058,335. Funding came from $80,382,781 in Federal funds, $9,611,555 in State funds, and $10,064,000 from the Treasure Island Development Authority.


Press release



Key features

Project Map

A map of the new westbound on- and off-ramps

Related programs


The Treasure Island Transportation Program will address the island's growing transportation needs with a goal to have at least 50 percent of trips made by transit instead of private vehicles.

The project reconstructed the I-80 eastbound off-ramp to Yerba Buena Island. The project features an innovative design that enhances safety and circulation. The project was completed in 2023 and reopened to traffic.

The West Side Bridges Retrofit will seismically retrofit eight existing bridge structures along Treasure Island Road to meet current seismic safety standards.

Vista Point is a scenic rest stop on Yerba Buena Island near the Bay Bridge east span bicycle/pedestrian path.