SR 84 Expressway Widening and SR 84/I-680 Interchange Improvements Project

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The California Department of Transportation (Caltrans), in cooperation with the Alameda County Transportation Commission (Alameda CTC), proposes to widen and conform State Route (SR) 84 to expressway standards between south of Ruby Hill Drive and the Interstate 680 (I-680) interchange. The project would also improve SR 84/I-680 interchange ramps and extend the existing southbound I-680 High Occupancy Vehicle/express lane northward by approximately 2 miles. The purpose of the proposed project is to alleviate traffic congestion, improve operations and safety, and improve bicycle access on SR 84 and at the SR 84/I-680 interchange.


Downoad the Public Meeting Presentation, November 2017.

A Draft Environmental Impact Report (EIR)/Environmental Assessment (EA) (PDF) has been prepared for the proposed project and is available for public review. Printed copies are available for review at:

  • Caltrans District 4 Office, 111 Grand Avenue, Oakland, CA 94612, on weekdays from 8 AM to 5 PM;
  • Livermore Public Library, Civic Center, 1188 South Livermore Avenue, Livermore, CA 94550;
  • Rincon Branch Library, 725 Rincon Avenue, Livermore, CA 94551; and
  • Pleasanton Library, 400 Old Bernal Avenue, Pleasanton, CA 94566.


Share your comments: Caltrans will accept comments on the Draft EIR/EA until December 18, 2017, via postal mail to:

Brian Gassner
California Department of Transportation
111 Grand Avenue, MS 8B
Oakland, CA, 94612
Or via email to

You may also provide written comments in person at one of the public meetings.

Attend a meeting: You are invited to attend a public meeting and open house about the findings of the EIR/EA and the potential environmental effects of the proposed project. Meetings will be held at the following locations and dates:

Wednesday, November 15, 2017, 6 to 8 PM
Robert Livermore Community Center, Larkspur Room, 4444 East Ave, Livermore, CA 94550

Thursday, November 16, 2017, 6 to 8 PM
Sunol Glen Elementary School, Auditorium, 11601 Main St, Sunol, CA 94586

Tuesday, November 21, 2017, 6 to 8 PM
Amador Recreation Center, 4455 Black Ave, Pleasanton, CA 94566

A brief presentation on the project will begin at 6:30 PM. The rest of the meeting will consist of an open house in which attendees can view informational exhibits and ask questions of project team members.

The meeting facility is accessible to persons with disabilities. Persons requesting special accommodations should contact Caltrans District 4 Office of Public Affairs at (510) 286-4444, or use the California Relay Service TTY number, (800)-735-2929, no later than three days before the meeting.


For additional information, contact Jack Siauw, Project Manager, Caltrans at (510) 715-9574 or contact Gary Sidhu, Project Manager, Alameda CTC, at (510) 208-7414.

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