The STATUS Newsletter is published every month after the STA Board meeting to inform the public and our stakeholders of what’s happening with transportation in Solano County.
Click the link HERE to view the May 2026 STATUS Newsletter.
Date: 5 May 2026
Agency: Solano Transportation Authority, Caltrans District 4-Bay Area
Contact: Sean Person, Contact: Sabrina Martinez
Phone: (707) 399-3217, Phone: (510) 934-5257
State Route 37 (SR 37)/Fairgrounds Drive Interchange in Vallejo:
Solano Transportation Authority and Caltrans
Reaching Major Milestone with New Interchange Opening
SOLANO COUNTY – The Solano Transportation Authority (STA), in close coordination with its transportation partner, the California Department of Transportation (Caltrans), is in the process of completing construction work on the new State Route 37 (SR 37)/Fairgrounds Drive Interchange Project in Vallejo. The interchange improvement project will enhance motorist safety and improve bicycle and pedestrian access with construction of a new Diverging Diamond Interchange.
This is the first-ever Diverging Diamond Interchange (DDI) constructed in the Bay Area and only the second-ever constructed on a major highway in California.
What to Expect:
The new DDI is anticipated to open to traffic on Saturday, May 16, weather dependent. Work is underway and will involve overnight closures:
We appreciate the public’s cooperation and patience as important work on this important project continues! Motorists should drive with caution in construction zones, slow down for worker safety and expect travel delays. All work is weather dependent.
Diverging Diamonds are Safer and Easier to Access
The Diverging Diamond Interchange will provide a safer, easier entrance to Vallejo while improving accessibility for residents and businesses near the SR 37 and Fairgrounds Drive corridor. The project will improve flow of traffic in the area, reducing delays and creating a simpler interchange to navigate safely.
The DDI supports increased connectivity to regional transit, the greater Vallejo area, and employment and recreation centers, including Six Flags/Discovery Kingdom. Additionally, the project will allow bicyclists and pedestrians a more direct bike path to Vallejo from surrounding communities, such as American Canyon and Napa.
Navigating the DDI is easy, just follow the road! Watch the informational video available on the STA website or at the link below for more information.
To learn about how to use the DDI, please watch our informational YouTube video at https://youtu.be/L7QOoovsVuU?si=AOsSTF2hREcpQwhA.
For general questions, please email our project team at:
SR37-FairgroundsPIO@portal3.pbid.com.
For more information about the project, please visit https://sta.ca.gov/project/redwood-parkway-fairgrounds-dr-improvement-project/.
For media inquires, please view the project media bar at https://dot.ca.gov/caltrans-near-me/district-4/d4-projects/d4-37-corridor-projects/37-diverging-diamond-interchange-media-resources.
Date: May 1, 2026
Agency: 4 – Oakland
Contact: Sabrina Martinez
Phone: (510) 934-5257
Email: sabrina.martinez@dot.ca.gov
UPDATE
Weekend Closure of Solano Ave/Spring Road – Interstate 80 (I-80) On-Ramp Rescheduled Vallejo City, Solano County
May 1, 2026, at 07:00 PM to May 4, 2026 at 05:00 AM
SOLANO COUNTY – Caltrans Construction continues to upgrade lighting around Solano County. To ensure worker and public safety, a full closure is scheduled of the Solano Avenue/Spring Road On-Ramp to Westbound (WB) i-80 in Vallejo starting on Friday, May 1, 2026 at 07:00 PM and opening on Monday, May 4, 2026 at 05:00 AM. Caltrans will be constructing curb ramps and installing new traffic signals at the intersection of Solano Avenue/Springs Road and the WB I-80 On-Ramp.
Schedule:
RESCHEDULED-
Start – May 1, 2026, at 07:00 PM
End – May 4,2026 at 05:00 A.M
Detours:
Motorists:
Westbound Solano Ave Detour:
Motorists traveling Westbound on Solano Avenue will need to turn right onto Mariposa Street, right turn on Tennessee
Street and a right turn onto the WB I-80 on-ramp.
Eastbound Solano Ave Detour:
Motorists traveling Eastbound on Solano Avenue will need to turn left on Mariposa Street, right turn on Tennessee Street and a right turn onto the WB I-80 on-ramp.
Southbound Mariposa Street Detour:
Motorists traveling southbound on Mariposa Street will need to turn right on Solano Avenue, left turn on southbound 14th Street and a left turn onto the Campbell Street WB I-80 on-ramp.
Pedestrians will be detoured to use the opposite side of the road via signage on barricades.
**All work is weather dependent and subject to change**
For 24/7 traffic updates, follow 511.org: https://twitter.com/511SFBay
For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/
The STATUS Newsletter is published every month after the STA Board meeting to inform the public and our stakeholders of what’s happening with transportation in Solano County.
Click the link HERE to view the April 2026 STATUS Newsletter.
Date: April 23, 2026
Agency: 4 – Oakland
Contact: Sabrina Martinez
Phone: (510) 934-5257
Email: sabrina.martinez@dot.ca.gov
UPDATE
Weekend Closure of Solano Ave/Spring Road – Interstate 80 (I-80) On-Ramp Rescheduled Vallejo City, Solano County
May 1, 2026, at 07:00 PM to May 4, 2026 at 05:00 AM
SOLANO COUNTY – Caltrans Construction continues to upgrade lighting around Solano County. To ensure worker and public safety, a full closure is scheduled of the Solano Avenue/Spring Road On-Ramp to Westbound (WB) i-80 in Vallejo starting on Friday, May 1, 2026 at 07:00 PM and opening on Monday, May 4, 2026 at 05:00 AM. Caltrans will be constructing curb ramps and installing new traffic signals at the intersection of Solano Avenue/Springs Road and the WB I-80 On-Ramp.
Schedule:
NEW DATES-
Start – May 1, 2026, at 07:00 PM
End – May 4,2026 at 05:00 A.M
Detours:
Motorists:
Westbound Solano Ave Detour:
Motorists traveling Westbound on Solano Avenue will need to turn right onto Mariposa Street, right turn on Tennessee
Street and a right turn onto the WB I-80 on-ramp.
Eastbound Solano Ave Detour:
Motorists traveling Eastbound on Solano Avenue will need to turn left on Mariposa Street, right turn on Tennessee Street and a right turn onto the WB I-80 on-ramp.
Southbound Mariposa Street Detour:
Motorists traveling southbound on Mariposa Street will need to turn right on Solano Avenue, left turn on southbound 14th Street and a left turn onto the Campbell Street WB I-80 on-ramp.
Pedestrians will be detoured to use the opposite side of the road via signage on barricades.
**All work is weather dependent and subject to change**
For 24/7 traffic updates, follow 511.org: https://twitter.com/511SFBay
For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/
Date: April 16, 2026
Agency: 4 – Oakland
Contact: Sabrina Martinez
Phone: (510) 934-5257
Email: sabrina.martinez@dot.ca.gov
J-Mack Ferry Closure on Ryer Island, Solano County
May 7, 2026, 12:00 P.M. to July 8, 2026, 10:00 P.M.
SOLANO COUNTY – Caltrans Delta Maintenance will suspend service for the J-Mack Ferry for its scheduled maintenance. The vessel will be out of service starting May 7 at 12:00 PM until July 8 at 10:00 PM for its five-year dry dock, which includes a comprehensive inspection below the waterline and significant maintenance work.
Maintenance crews will dry dock the J-Mack Ferry, meaning the Ferry will be removed from the water for workers access to the hull for easier inspection and maintenance.
Schedule:
Start, Thursday, May 7 2026 at 12:00 PM
Back in Service, Friday, July 8, 2026, at 10:00 PM
DETOUR:
Motorist travelling to Ryer Island are advised to use the Real McCoy II Ferry or the Miner’s Slough Bridge. For real time updates on Real McCoy II Operations use the Delta Ferry Hotline (510) 622-0120.
For 24/7 traffic updates, follow 511.org: https://twitter.com/511SFBay
For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/
Date: April 15, 2026
Agency: 4 – Oakland
Contact: Sabrina Martinez
Phone: (510) 934-5257
Email: sabrina.martinez@dot.ca.gov
Daytime Ramp Closure of Westbound On/off Ramp of Interstate 80 (I-80) at Tennessee St. in Vallejo, Solano County
Friday, April 17, 2026, from 09:00 AM to 03:00 PM.
SOLANO COUNTY – Caltrans Construction will fully close the westbound on- and off-ramps at Tennessee St. to install trash capture systems for the safety of workers and motorists. The closures will occur Friday, April 17, 2026, from 09:00 AM to 03:00 PM.
This project includes installation of trash capture systems to prevent debris from entering local waterways. Additional work includes guardrail upgrades, construction of mainline pullouts for maintenance vehicles, and erosion control improvements.
Schedule:
Friday, April 17, 2026
From 09:00 AM to 03:00 PM
DETOUR:
WB I-80 Off-Ramp at Tennessee St.
Motorists who want to exit I-80 will need to continue on I-80 and take Exit Solano Ave/Springs Rd (31 A). Cross Solano Ave., then continue on Mariposa St. to Tennessee St.
WB I-80 On-Ramp from Tennessee St.
Motorist on Tennessee St. will need to turn on Mariposa St. toward Solano Ave. then cross Solano Ave and take WB I-80 On-Ramp.
** All work is weather dependent and subject to change**
For 24/7 traffic updates, follow 511.org: https://twitter.com/511SFBay
For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/
Date: April 15, 2026
Agency: 4 – Oakland
Contact: Sabrina Martinez
Phone: (510) 934-5257
Email: sabrina.martinez@dot.ca.gov
CANCELLED Vallejo City, Solano County
UPDATE: 55 Hour Closure of Solano Ave/Spring Road – Interstate 80 (I-80) On-Ramp
NEW DATES TO BE DETERMINED
SOLANO COUNTY – Caltrans Construction continues to upgrade lighting around Solano County. To ensure worker and public safety, a full closure was scheduled of the Solano Avenue/Spring Road On-Ramp to Westbound (WB) i-80 in Vallejo from April 17-20 but has been CANCELLED WITH NEW DATES TO BE DETERMINED.
Schedule:
CANCELLED
NEW DATES TO BE DETERMINED
For 24/7 traffic updates, follow 511.org: https://twitter.com/511SFBay
For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/
Date: April 14, 2026
Agency: 4 – Oakland
Contact: Sabrina Martinez
Phone: (510) 934-5257
Email: sabrina.martinez@dot.ca.gov
UPDATE/REMINDER
Daytime Single Lane Closures in Various Locations Along State Route 29 (SR-29) in Vallejo City, Solano County
Daily, Monday through Friday, at 09:00 AM to 04:00 PM
SOLANO COUNTY – Caltrans Construction continues to make progress on SR-29 (Sonoma Blvd) Complete Street and Rehabilitation Project. To ensure worker and public safety, there will be intermittent single-lane closures (depending on where the work occurs). One city street will remain open in the direction of travel during the day.
Schedule:
Daily, Monday through Friday, at 09:00 AM to 04:00 PM
From now to May 3, 2026, No Parking signs will be set up from Mississippi Street to Curtola Parkway. Monday to Friday from 7:00 AM to 3:30 PM. Motorist will be asked not to park in designate areas.
Ramps are being updated to ADA specifications. Current Locations include-
Sandy Beach Drive, McLane St. Winchester, Chestnut St. Bennett Ave, Solano Ave Curtola PWY, Pennsylvania, Kentucky St Serreno, Seuoia Ave, Magazine St, Lemon St,
Capitol, Ohio, Tennessee, Mississippi St , California St., Redwood St., Nebraska St.
Pedestrians will be detoured to use the opposite side of the road via signage and barricades.
**All work is dependent on weather. Work will generate noise from equipment used to complete the repaving. **
For 24/7 traffic updates, follow 511.org: https://twitter.com/511SFBay
For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/
Date: April 3, 2026
Agency: 4 – Oakland
Contact: Sabrina Martinez
Phone: (510) 934-5257
Email: sabrina.martinez@dot.ca.gov
Nighttime Lane Closure and On/Off-Ramp Lane Closures on Interstate 80 (I-80) in Vallejo & Fairfield, Solano County
Starting April 6, 2026, from 08:00 PM to 05:00 AM the following day.
SOLANO COUNTY – Caltrans Construction will be starting a new project that requires nighttime lane closure of multiple locations to set up temporary barriers in the construction site to ensure worker and public safety. Closures will occur nightly starting on Monday, April 6, 2026, at 08:00 PM to 05:00 AM the following day until set up completes Friday, April 10, 2026.
This project will install trash capture systems that will stop trash from going out into water sources. It will also entail update of guardrails and construction of mainline pull outs for maintenance vehicles and erosion control.
Schedule:
Nightly:
Start – Monday, April 6, 2026, at 08:00 PM to 05:00 AM the following day
End- Friday, April 10, 2026
On/Off-Ramp Locations:
Contractors will set up at one site and once they complete will move to the next location.
Vallejo –
Fairfield –
** All work is weather dependent and subject to change**For 24/7 traffic updates, follow 511.org: https://twitter.com/511SFBayFor real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/