Author: Neil Quintanilla

Date: March 24, 2026
Agency: 4 – Oakland
Contact:  DeNise Harding
Phone:  (279) 234-2175

UPDATE: FINAL NIGHT OF CARQUINEZ BRIDGE (I-80) STEEL WELD INSPECTION & PLATE REPAIRS

 

CONTRA COSTA & SOLANO COUNTIES  – Caltrans has performed essential T1 Steel Weld Inspection Projects for weld inspections and repairs on three Bay Area Bridges, San Mateo-Hayward Bridge (SR-92), Benicia-Martinez Bridge (I-680) and Carquinez Bridge (I-80). This project began in Fall of 2023 and was critical to ensure the long-term safety and integrity of these important Bridges.

The final scheduled night for Steel Weld Inspection and plate repairs on the Carquinez Bridge eastbound I-80 in Crockett is Wednesday March 25, 2026; at 3:00 AM and will conclude at 1:00 PM.

The inspections of the San Mateo-Hayward Bridge (SR-92) and Benicia-Martinez Bridge (I-680)have been completed. Upon completion of this project, all three bridges will continue tomeet established safety requirements, ensuring that drivers and commuters can rely on thesevital crossings for safe travel throughout the region.

Carquinez Bridge eastbound I-80 Lane/Ramp Closure Details for Wednesday, March 25th 3:00 AM to 1:00 PM

1. Full Closure: EB I-80 Onramp fromPomona St/San Pablo Ave
2. Lane Closures: EB I-80 Lanes 3 and 4from Refinery Rd to Carquinez Toll Plaza

Drivers may experience minor delays and are advised to plan ahead and allow extra time. Be work zone alert, drive with caution through the work zone.

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: March 23, 2026
Agency: 4 – Oakland
Contact:  Sabrina Martinez
Phone:  (510) 934-5257
Email:  sabrina.martinez@dot.ca.gov

 

Nighttime Traffic Control on State Route-12 in Suisun City, Solano County

Eastbound and Westbound direction from Walters Road to Lambie Road until completion of the project.

 

SOLANO COUNTY  –  Caltrans Construction continues rehabilitation work on State Route – 12, by installing median concrete barriers and guardrails.

Eastbound and westbound lanes of State Route12 will be subject to one-way traffic control. With one lane open at a time alternating directions of traffic through the work zone.

Schedule:
Monday – Thursday from 08:00 PM to 05:00 AM
Friday from 09:00 PM to 07:00 AM

Weekend closures as needed
Saturday from 09:00 PM to 08:00 AM
Sunday from 09:00 PM to 05:00 AM

** All work is weather dependent and subject to change**

Date: March 23, 2026
Agency: 4 – Oakland
Contact:  Sabrina Martinez
Phone:  (510) 934-5257
Email:  sabrina.martinez@dot.ca.gov

 

Daytime Intermittent Lane Closure on State Route 12 Drouin Drive to State Route-113

Monday March 23 through Saturday March 28

 

SOLANO COUNTY  – Caltrans Maintenance crews will be out on State Route12 replacing channelizers. Work will be completed in sections, starting from Drouin Drive to Church then Church Road to Summerset Road until they reach State Route 113.

Traffic will be stopped in both directions for 10 to 15 minute increments, channelizer will be replaced, then traffic will be allowed through until it clears for another 10 to 15 minute increment and repeating the process.

Schedule:
Monday March 23 through Saturday March 28 from 0600 A.M to 04:00 P.M.

The public is advised to use an alternate route, if possible, to avoid delays.

** All work is weather dependent and subject to change**

Date: March 2, 2026
Agency: 4 – Oakland
Contact:  Sabrina Martinez
Phone:  (510) 934-5257
Email:  sabrina.martinez@dot.ca.gov

Daytime Single Lane Closures on State Route 29 (SR-29) from Curtola Parkway to Valle Vista Avenue for Pavement Project in Vallejo

Schedule: Through March – Monday through Friday from 9 a.m. to 4 p.m.

SOLANO COUNTY  – Caltrans Construction is continuing its pavement rehabilitation and Complete Streets project on State Route 29 (SR-29), also known as Sonoma Boulevard. In addition to driveway and alley repaving at multiple locations. Lighting fixtures, like lamp poles will be installed in multiple areas as well. All work is taking place on SR-29 from Curtola Boulevard to Valle Vista Avenue in Vallejo.

Work will continue in March and run through early April from 9 a.m. to 4 p.m. Mondays through Fridays on both Southbound and Northbound sides of SR-29. 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.

**All work is dependent on weather. Work will generate noise from equipment used to complete the repaving.**

For more information, see this site: https://dot.ca.gov/caltrans-near-me/district-4/d4-projects/d4-sr29-vallejo

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: February 27, 2026
Agency: 4 – Oakland
Contact:  Sabrina Martinez
Phone:  (510) 934-5257
Email:  sabrina.martinez@dot.ca.gov

 

UPDATE:
Daytime Single Lane Closure on State Route -29, Interstate-80 and Interstate-780

Schedule: Monday – Friday from 9 AM to 3 PM

 

SOLANO COUNTY  – Caltrans is continuing to work with installation of new electrical equipment to improve pedestrian safety at unsignalized crosswalks around Solano County. This includes new ADA curb ramps and restriping of the cross walks around the intersection.

New ADA Compliant curb ramp will continue to be constructed in the following locations through Friday, March 20 a single lane will be closed with one city street open in the direction of travel during the day from 9 am to 3 pm.

Pedestrians are directed to utilize the crosswalk on the other side of the road via signage barricades on the sidewalk.

** All work is weather dependent and subject to change**

Detour Information:

Vallejo
• SR-29 – at Ryder Street and at Arkansas Street.

• SR-37 – at Eastbound off-ramp to Wilson Avenue

• I-80 – Westbound on-ramp from Springs Road/Solano Avenue (SR-29)
Ramp Detour
Drivers trying to get on WB I-80 from Springs Road/Solano Avenue should take Mariposa Street toward Tennessee Street; take a right on Tennessee Street and then take the on-ramp to Westbound I-80.

• I-80 – WB On/Off-Ramp from/to Tennessee Rd.
Ramp Detour
Drivers trying to get onto WB I-80 on-ramp from Eastbound Tennessee Street: take a right on Mariposa Street; continue on Mariposa Street and take the on-ramp to Westbound I-80

• I-780 – Eastbound off-ramp to Glen Cove Road
Ramp Detour
Motorist trying to get on I-780 from Glen Cove Road need to continue on Glen Cove Parkway toward Benicia Road and take a right on Benicia Road; then a right on Columbus Parkway; take a right on Rose Drive/State Park Road and onto the on-ramp to Eastbound I-780

Fairfield
• I-80 – Westbound and Eastbound on- and off-ramp from Allison Drive

Benicia
• I-780 – Westbound and Eastbound on-ramp from East Fifth Street
Ramp Detour
Drivers trying to access the on-ramp for I-780 from East Fifth Street need to take a right on Military West; then a right on East 2nd Street. Then take the on-ramp to Westbound I-780

Date: February 6, 2026
Agency: 4 – Oakland
Contact:  Sabrina Martinez
Phone:  (510) 934-5257
Email:  sabrina.martinez@dot.ca.gov

 

12 Hour Full Closure Minor Slough Bridge

Schedule: Thursday, Feb. 12 – from 6 a.m. to 6 p.m.

 

SOLANO COUNTY  – Caltrans is finishing the last portion of repair work to the deck of Miner Slough Bridge, which includes a repaving of the deck. Due to the narrow bridge and weight capacity, full closure is necessary for paving equipment and workers to efficiently and safely complete the work.

On Thursday, February 12, there will be daytime closures of Miner Slough Bridge. Work will be conducted from 6 a.m. to 6 p.m. All work is dependent on weather.

Detours-
The Real McCoy Ferry will be running on the day of closure for any vehicles that will need to access Ryer Island. Due to limited staffing the J-Mack will not be available.

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: January 20, 2026
Agency: 4 – Oakland
Contact: Sean Person, Geoffrey Johnson
Phone:  (707) 399-3217, (510) 421-7348

State Route 37/SR-37- Fairgrounds Drive Interchange- Vallejo
Solano Transportation Authority and Caltrans Begin the
Next Phase of Construction
Expect Delays on Fairgrounds Drive; See Map with Alternate Routes!

SOLANO COUNTY  – The Solano Transportation Authority (STA), in close coordination with its transportation partner, the California Department of Transportation (Caltrans), is continuing 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 divergent diamond interchange. This is the first-ever divergent diamond interchange (DDI) constructed in the Bay Area and only the second-ever constructed on a major highway in California.

What to Expect During Initial Construction Work
Construction at SR 37 and Fairgrounds Drive started construction in April 2025. The site is near the Six Flags Discovery Kingdom Theme Park and the Solano County Fairgrounds. In May traffic in both directions were shifted to the west side of SR 37 and a temporary pedestrian walkway was constructed. Now, STA and Caltrans are moving forward with work to reconstruct the existing Fairgrounds Dr and widen the roadway to accommodate the upcoming Diverging Diamond Interchange.

The following construction-related activities are slated for Monday – Friday during the weeks of January 26, 2026, and February 2, 2026.

Community members and motorists are advised to expect delays and are encouraged to use alternate routes during this time. (Please see map)

• Contractor to reduce northbound Fairgrounds Dr. from SR37 to Gateway Dr. down to one lane, day and night

• During this period, weather-permitting, Fairgrounds Drive will be restriped utilizing single lane closures during daytime hours, 7:00am to 4:00pm.

Motorists should drive with caution in construction zones and expect travel delays. All work is weather dependent.

We appreciate the community’s and motorists’ cooperation and patience as important work to improve the safety and accessibility of this important project continues!

For general questions, please email our project team at: SR37-FairgroundsPIO@portal3.pbid.com.

For more information about the project and to view a video explaining the DDI design, please visit https://sta.ca.gov/project/redwood-parkway-fairgrounds-dr-improvement-project/.

 

 

Date: January 15, 2026
Agency: 4 – Oakland
Contact:  Sabrina Martinez
Phone:  (510) 934-5257
Email:  sabrina.martinez@dot.ca.gov

 

One Way Traffic Control on Miner Slough Bridge (PM 12.1)

Schedule: From 7 a.m. to 4 p.m.

 

SOLANO COUNTY  – Caltrans will start repair work to the deck of Minor Slough Bridge, which includes a repaving of the deck.

There will be daytime lane closures with one way traffic control from the entrance of Holland Rd to the other end of the bridge on Ryer Rd. Work will be conducted from 7 a.m. to 4 p.m. All work is dependent on weather.

Large trucks are advised to attempt to make tight turns and use cation when approaching the Miner Slough Bridge for your safety and the safety of people on the road.

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/