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Interstate Highway Projects

Pacific Gas & Electric (PG&E) Valve Lot Relocation Project

The Solano Transportation Authority (STA) proposes to relocate an existing Pacific Gas & Electric (PG&E) valve from its current location between Interstate 680 and Lopes Road in the City of Fairfield.  The valve lot would be relocated to a parcel of vacant land on the east side of I-680, approximately 0.2 miles to the east of the exisitng lot.  New gas pipelines would be constructed to connect existing transmission lines in the project area to the relocated valve lot.  Once the relocation is complete, the existing valve lot and associated pipelines would be deactivated. 

Draft Mitigated Negative Declaration (PDF, 2940 KB)

Appendix A (PDF, 78 KB)

Appendix B (PDF, 3360 KB)

Appendix C (PDF, 349 KB)

Appendix D (PDF, 778 KB)

The review period for the proposed Mitigated Negatove Declaration (MND) begins on Tuesday, September 20, 2011, and ends Friday, October 21, 2011.  The public is invited to review and submit comments on the proposed MND and initial study.  Written comments must be received by 5:00 PM on the last day of the review period and addressed to:

Janet Adams
Deputy Executive Director/Director of Projects
Solano Transportation Authority
One Harbor Center, Suite 130
Suisun City, CA 94585

A Public Hearing will be held to provide recommendations on the Draft MND to the STA Board:

Wednesday, December 14, 2011, 6:00PM at the Suisun City Council Chambers (701 Civic Center Boulevard, Suisun City, CA). 

At this time, it is anticipated that the STA Board will consider adoption of the proposed MND.  Notification will be provided if the schedule changes.

Copies of the document can also be reviewed at the STA Office or Fairfield Cordelia Library:

STA Office

One Harbor Center, Suite 130

Suisun City, CA 94585


Fairfield Cordelia Library

5050 Business Center Drive

Fairfield, CA 94534


I-80/I-680/SR-12 Interchange Project


The STA and Caltrans have been working on the Project Approval / Environmental Document (PA/ED) phase of the project since the Notice of Intent in 2003, pursuant to the National Environmental Policy Act (NEPA) and the California Environmental Quality Act (CEQA).  Caltrans, in conjunction with the STA, studied the effects this proposed project may have on the environment.

On March 14, 2012, the STA Board determined that the Acquisition of Properties for the Interstate 80/Interstate 680/State Route 12 Interchange Project Initial Construction Package will not have a significant effect upon the environment and is exempt further procedures under the California Environmental Quality Act (CEQA).  Download the Notice of Determination for the "Acquisition of Properties for the Interstate 80/Interstate 680/State Route 12 Interchange Project Initial Construction Package, 03-14-2012.

The Final Environmental Impact Report/Environmental Impact Statement (EIR/EIS) is available for public review. Design and construction of the interchange will be conducted in phases between 2012 and 2030.

The Biological Assessment  can be downloaded here. (35.5 MB PDF)


I-80/I-680/SR-12 Interchange Project

Download an I-80/I-680/SR-12 Corridor Progress Newsletter:

Download an I-80 Interchange Fact Sheet (May 2007)

To view more information about this project, click here.

I-80/I-680/SR 12 Interchange Alternatives
I-80/I-680/SR-12 Interchange Project
Open House Exhibits

I-80 Cordelia Truck Scales Relocation

The Truck Scales Relocation Project is considered part of the
I-80/I-680/SR12 Interchange project. Visit the STA Studies page to learn more about the background of this project.  Visit the Truck Scales Relocation Project to learn more about the project, including the I-80 Eastbound Cordelia Truck Scales Relocation Project Final Environmental Impact Report/Environmental Assessment (EIR/EA).         

Download a Truck Scales Relocation Project Fact Sheet (May 2007)

I-80 HOV Express Lanes Conversion Project

The I-80 Express Lanes project will cover the existing High Occupancy Vehicle (HOV) lanes as well as new construction from Air Base Parkway to I-505.  The anticipated construction start date is August 2014.

Project Schedule

I-80 High Occupancy Vehicle (HOV) Lanes (Fairfield)

I-80 HOV Ribbon Cutting

I-80 High Occupancy Vehicle Lanes

I-80 Pavement Rehabilitation photo by Caltrans

The project was completed in November 2009, adding over eight miles of HOV lanes in both directions and widening the median on I-80 from approximately Red Top Road to Airbase Parkway. The HOV lanes are now open from 5:00 a.m. to 10:00 a.m. and 3:00 p.m. to 7:00 p.m. Monday through Friday for vehicles with 2 or more occupants.

As a busy trade, travel and commuting corridor, there are approximately 150,000 vehicles traveling on Interstate 80 each day. This number increases to more than 200,000 vehicles per day through the City of Fairfield. The new carpool lanes will enhance capacity by encouraging motorists to rideshare and reduce the number of vehicles on the highway.

HOV lanes play a crucial role in helping to support more sustainable transportation choices by providing an incentive to carpool, vanpool or take a bus. This Proposition 1B Corridor Mobility Improvement Project (CMIA) was the first CMIA project in the Bay Area. In addition to the carpool lanes, this project also provided a new concrete median barrier and wider bridges to accommodate the new lanes. Click here for more information on Prop 1B funding.

Download an I-80 HOV Red Top - AB Pkwy Fact Sheet (May 2007)

I-80 High Occupancy Vehicle (HOV) Lanes (Vallejo)

I-80 High Occupancy Vehicle Lanes

The proposed project includes a westbound and eastbound High Occupancy Vehicle (HOV) Lane between SR 37 and the Carquinez Bridge, improvements to the Redwood Parkway/I-80 Interchange.

Download the Project Study Report (PSR):

Caltrans I-80 Pavement Rehabilitation Projects

I-80 Emergency SHOPP Repair

I-80 Rehab photo by Caltrans

I-80 Newsletter 06-08


Caltrans programmed over $140 million of State Highway Operations and Protection Program (SHOPP) rehabilitation projects for I-80 between Vacaville and Vallejo. This project started in Fiscal Year (FY) 2007-08 with work in the cities of Vacaville and Vallejo, and occurred concurrently with the construction of the new I-80 HOV lanes project.

The rehabilitation project provided a new concrete median barrier and wider bridges to accommodate the new lanes.  A ribbon cutting ceremony for the new carpool lanes and three paving rehabilitation projects completed in 2009 was held on November 5th in Fairfield.

Click here for the June 2008 I-80 Rehabilitation Projects Newsletter has been established as a quick link to the Caltrans I-80 Rehabilitation website. Click here for current status of the I-80 Pavement Rehabilitation Project on the Caltrans Pave80 website.


Local Interchange Projects - I-80 Redwood Parkway-Fairgrounds Dr. Improvement Project, Vallejo

I-80 High Occupancy Vehicle LanesThe proposed project would include roadway improvements along portions of Fairgrounds Drive and Redwood Parkway/Redwood Street, and several nearby intersections and interchanges within the City of Vallejo. The project would widen and improve 1.5 miles of Fairgrounds Drive, extending from the State Route 37 interchange to the Redwood Parkway/Interstate 80 interchange. In addition, a number of intersections and interchanges would be improved, including Redwood Street/Parkway and Interstate 80, Fairgrounds Drive and State Route 37. Several local streets would require improvement or modification, including Moorland Street and Redwood Street, Redwood Parkway, and Admiral Callaghan Lane.  The purpose of the Project is to relieve congestion and improve traffic flow on local streets; improve the existing interchange and intersection operations; improve the safety of local streets; and increase capacity of the local roadway network to support future growth in the area.

October 11, 2012 Public Meeting for Environmental Document Comments

A draft environmental impact report/environmental assessment (EIR/EA) has been prepared for the Redwood Parkway-Fairgrounds Drive Improvement Project (project).  A public meeting will be held to provide you an opportunity to comment on the environmental document before the final design alternative is selected.  Additionally, noise abatement options have been evaluated at potential noise affected areas along the project corridor. The location of the noise measurements and abatement options will be presented at the public meeting and comments regarding the potential barrier locations are requested.

Thursday, October 11, 2012
7:00 – 8:00 p.m.

Cooper Elementary School,
Multipurpose Room
612 Del Mar Avenue
Vallejo, CA 94589-2698

For language translation, special seating accommodation or other assistance at the public meeting, please contact the STA at (707) 424-6075 at least one week prior to the meeting.

Download the Draft Environmental Impact Report/Environmental Assessment (EIR/EA) for the Redwood Parkway-Fairgrounds Drive Improvement Project, 09-21-2012, (15.7MB)

Download the Notice of Availability of the EIR/EA and Public Meeting for the Redwood Parkway – Fairgrounds Drive Improvement Project  (162KB)

Descargue el Aviso De Disponibilidad Del Anteproyecto Del Reporte De Impacto Ambiental/
Evaluación Ambiental (Eir/Ea) Y Reunión Pública Para El Proyecto Mejoramiento De Redwood Parkway – Fairgrounds Drive

Download either the English or Spanish October 11th, 2012 public meeting announcements.

January 26, 2011 Public Meeting to Scope the Environmental Document

The public was invited to attend a scoping meeting to learn more about what would be planned and to provide input regarding issues that should be studied during the environmental review process. The meeting was held on Wednesday, January 26, 2011, at Cooper Elementary School.

Download the Project Study Report
Download the Information Flyer (432KB JPG)
Download the Project Location Map (806KB JPG)

Descargue el Aviador de Información en español (427KB JPG)
Descargue el mapa de la Ubicación de Proyecto en español (801KB JPG)

A public meeting was held on January 18, 2012 at Cooper Elementary School, located at 612 Del Mar Avenue in Vallejo California to provide information and answer questions about the proposed project. 

Download maps and documents from the January 18, 2012 public meeting: