Category: Uncategorized

Date: Sept. 15, 2025
Agency: 4 – Oakland
Contact:  Sabrina Martinez
Phone:  (510) 934-5257
Email:  sabrina.martinez@dot.ca.gov

State Route 37/Fairgrounds Drive Interchange – Vallejo
Construction Shifts into Gear – May 2025
Watch for Traffic Lane Shifts/Overnight Ramp Closures

SOLANO COUNTY  – Caltrans is scheduled to continue its paving and Slurry Seal overlay project on State Route 113 (SR-113), also known as 1st Street, which goes through the City of Dixon.

Portions of SR-113 have been closed in both directions starting the first week of September 2025 from 8 p.m. to 6 a.m. the next mornings and will continue through the duration of the project, scheduled to finish in within 30 working days. The construction activities may be noisy and create dust at times as work could involve drilling, demolition of existing slabs, back-up truck alarms and vibrations.

This project will require multiple lane, ramp and portions of the highway closures during construction. The number of lanes closed will depend on the closure location within the project limits.

Below are dates and locations that will be impacted during construction: (Please note that the dates are subject to change due to weather and other factors.)

⦁ Wednesday, Sept. 17 from I-80 Freeway to Adams Street (outside lanes)
⦁ Thursday, Sept. 18 from I-80 to Adams Street (inside lanes)
⦁ Sunday, Sept. 21 from I-80 to Adams Street (Anything that was not finished on Sept. 17 and Sept. 18)
⦁ Monday, Sept. 22 from Adams Street to Cherry Street
⦁ Tuesday, Sept. 23 from Cherry Street to Parkway Boulevard
⦁ Wednesday, Sept. 24 from Cherry Street to Parkway Boulevard

The following on- and off-ramps will be affected by the closure and will have intermittent detours as follows:

Detour for Northbound Route Connector to Westbound I-80
Drivers on Eastbound I-80 will take the SR-113 off-ramp to Pedrick Road; Then on Pedrick Road take a left to enter the Westbound I-80 on-ramp. Drivers will continue down Westbound I-80 and take the connector to Currey Road.
Drivers on Northbound Route 113 wanting to go to Northbound Currey Road. Will take the Eastbound I-80 on ramp and take the Pedrick Road off-ramp. A left turn will be taken on Pedrick Road to enter the Westbound I-80 on-ramp. Drivers will continue down Westbound I-80 and take the connector to Currey Road.

Detour for Southbound Route 113 on-ramp closure on Westbound I-80
Drivers will continue to travel on Westbound I-80 and take the Pitt School Road Exit and make a left onto Pitt School Road. Then enter Eastbound I-80 on-ramp and then take the Southbound Route 113 off-ramp.

Detour for Southbound Route 113 on-ramp closure on Currey Road
Driver will need to take the Westbound I-80 on-ramp and exit on Pitt school road then take a left on Pitt School Road and enter the Eastbound I-80 on ramp and then take the Southbound Route 113 Exit.

The 2025 Safe Routes to School (SR2S) Plan Update is now open for public comment for 30 days starting September 15. Over the past two years, STA staff worked with Solano Public Health, local jurisdictions, school districts, and SR2S Community Task Forces to update the plan, gather feedback, and assess program priorities.

As part of this process, STA staff and consultants confirmed or reestablished local Community Task Forces, identified priority projects, and conducted walk audits in each district. The updated plan outlines the program’s five-year vision, incorporates community input, and highlights priority projects for each school district.

Community members, school staff, and other stakeholders are encouraged to review the draft plan and submit comments. The deadline for public comments is October 15, 2025.

Comments can be submitted below or emailed to publiccomment@sta.ca.gov.

Please click HERE to view the Safe Routes to School Plan Update.

Date: Sept. 3, 2025
District: 4
Contact:  Sabrina Martinez
Phone:  (510) 934-5257
Email: sabrina.martinez@dot.ca.gov

One-way Traffic Control on State Route 12 (SR-12) at Mokelumne Bridge in Rural Solano County

Lane scheduled to be closed on Tuesday Sept. 9 from 9 a.m. to 2 p.m.

 

SOLANO COUNTY  – Caltrans has scheduled its annual inspection of Mokelumne Bridge located on State Route 12 (SR-12) near Rio Vista in the Sacramento-San Joaquin Delta region.

One lane will be closed on Tuesday, Sept. 9 from 9 a.m. to 2 p.m. During the closure, one-way traffic control will be utilized. This is a routine inspection to ensure the bridge safety.

For real-time traffic, click on Caltrans QuickMap:
https://quickmap.dot.ca.gov/

Date: Aug. 28, 2025
District: 4
Contact:  Sabrina Martinez
Phone:  (510) 934-5257
Email: sabrina.martinez@dot.ca.gov

Lane, Ramp Closures on State Route 113 in and near Dixon from Parkway Boulevard to SR-113/Interstate-80 (I-80) Interchange in Solano County

Schedule: Lanes scheduled to be closed from 8 p.m. until 6 a.m. each night

SOLANO COUNTY  –  Caltrans is scheduled to begin a paving and Slurry Seal overlay project on State Route 113 (SR-113), also known as 1st Street, which goes through the City of Dixon.

Portions of SR-113 will be closed in both directions starting on Sunday, Sept. 7 from 8 p.m. to 6 a.m. the next morning and will continue through the duration of the project, scheduled to finish in within 30 working days.

During the project, workers will perform dig-outs and Slurry Seal overlay. Dig-outs is a method of roadway repair where workers “dig out” layers of failed pavement. The excavated areas will be paved with Hot Mix Asphalt.

The project’s goal is to extend the life of the pavement until a more thorough paving project begins in the next few years.

The number of lanes closed will depend on the closure location within the project limits.

From Parkway Blvd./E Park Blvd. to Country Fair Dr./Silveyville Cemetery Road and from West H St./East H St. to the SR-113/80 Separation, at least one lane in each direction will remain open during construction.

Between Country Fair Dr./Silveyville Cemetery Rd. and West H St./East H St., traffic will be subject to one-way reversible control, managed with flaggers.

The following on- and off-ramps will be affected by the closure and will have intermittent detours as follows:

Detour for Northbound Route Connector to Westbound I-80
Drivers on Eastbound I-80 will take the SR-113 off-ramp to Pedrick Road; Then on Pedrick Road take a left to enter the Westbound I-80 on-ramp. Drivers will continue down Westbound I-80 and take the connector to Currey Road.

Drivers on Northbound Route 113 wanting to go to Northbound Currey Road. Will take the Eastbound I-80 on ramp and take the Pedrick Road off-ramp. A left turn will be
taken on Pedrick Road to enter the Westbound I-80 on-ramp. Drivers will continue down Westbound I-80 and take the connector to Currey Road.

Detour for Southbound Route 113 on-ramp closure on Westbound I-80
Drivers will continue to travel on Westbound I-80 and take the Pitt School Road Exit and make a left onto Pitt School Road. Then enter Eastbound I-80 on-ramp and then take the Southbound Route 113 off-ramp.

Detour for Southbound Route 113 on-ramp closure on Currey Road
Driver will need to take the Westbound I-80 on-ramp and exit on Pitt school road then take a left on Pitt School Road and enter the Eastbound I-80 on ramp and then take the Southbound Route 113 exit.

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: Aug. 22, 2025
District: 4
Contact:  Sabrina Martinez
Phone:  (510) 934-5257
Email: sabrina.martinez@dot.ca.gov

Lane Closures on Suisun Parkway/Business Center Drive as part of
Cordelia Truck Scales Improvement Project in Solano County

One lane will be closed in both directions starting on Tuesday, Aug. 26 at 7 a.m.

SOLANO COUNTY  – Caltrans is scheduled to begin installation of temporary construction entrances, stage construction, and associated restoration of Suisun Parkway/Business Center Drive as part of the Cordelia Truck Scales Improvement.

One lane will be closed in both directions starting on Tuesday, Aug. 26 at 7 a.m. and will continue through the duration of the project, scheduled to finish in spring 2028.

This closure is for construction access for workers to facilitate the construction of the truck scales on Interstate 80 (I-80).

A portion of the lane will be closed during the duration of construction from Business Center Drive to Busch Drive – a 1.25-mile portion. At least one lane in both directions will be open for traffic.

The project’s goal is to enable construction equipment to enter and exit safely and access the area where the new I-80 truck scales will begin construction.

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: June 28, 2025
District: 4
Contact:  Vince Jacala
Phone:  (510) 385-7069

Eastbound I-80 Express Lane Opens as Temporary HOV Lane Ahead of Formal Launch in Late 2025
Temporary HOV Lane Opened to Traffic
on Saturday, June 28, 2025

SOLANO COUNTY  – The new eastbound Interstate 80 (I-80) express lane running between Fairfield and Vacaville is now open to High-Occupancy Vehicle (HOV) traffic as of 8:00 AM Saturday, June 28, 2025.

Roadway construction on the new express lane is ongoing and electronics and hardware for collecting tolls are still being installed. In the meantime, this lane is available to vehicles with two or more people on board weekdays from 5:00 a.m. to 10:00 a.m. and 3:00 p.m. to 7:00 p.m.

The new HOV lane runs on eastbound I-80 from the Airbase Parkway in Fairfield to Interstate 505 (I-505) interchange in Vacaville.

As work is still in progress, Caltrans asks motorists to please be mindful of their speed for the safety of our workers. Caltrans and its transportation partners the Metropolitan Transportation Commission (MTC), the Solano Transportation Authority (STA) expect to formally launch the completed express lane by late 2025.

For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/ For 24/7 traffic updates, follow 511.org: https://x.com/511SFBay

Or call 1-800-472-7623 1-800-427-ROAD for state highway conditions statewide.

Date: May 28, 2025
District: 4
Contact:  Ryan Leong
Phone:  (510) 385-7068

Eastbound and Westbound- SR-12 Solano County
Roadway Improvement Project
Starts Thursday, May 29
8:00 PM-5:00 AM Monday – Friday

SOLANO COUNTY  – Caltrans is scheduled to begin construction on both directions of State Route 12 (SR-12) in Solano County near Suisun City from Lawler Ranch Parkway to Shiloh Road.

Workers will overlay new asphalt, replace culverts, build bridge rails, and install median barriers.

Eastbound and westbound lanes of SR-12 will be subject to one-way traffic control.

Only one lane will be open at a time, with traffic alternating directions through the work zone.

All work depends on weather. Additional construction work may also be scheduled occasionally on weekends.

Overnight work is scheduled until further notice. Caltrans will provide additional information as soon as it becomes available.

Construction may cause delays between Walters Road and Lambie Road.

For the latest road and highway conditions statewide got to Caltrans quick maps:
https://quickmap.dot.ca.gov/

Or call 1-800-427-ROAD or I-800-427-7623.

Caltrans thanks the public for its patience and understanding as we work to maintain and improve our state’s highways, bridges and tunnels.

The Solano Transportation Authority, along with Caltrans, City of Vallejo, County of Solano, and Metropolitan Transportation Commission, will be conducting an open house to answer any questions related to the existing construction of the State Route 37/Fairgrounds Drive Interchange Project on Thursday, June 5, 2025, from 5:30pm-7:30pm.

The event is open to the public and will be held at the North Vallejo Community Center, located at 1121 Whitney Avenue in the City of Vallejo. We cordially invite the public to attend to get to know more about the project and its improvements, as well as talk to the project team.

The State Route 37/Fairgrounds Drive Interchange Project will address issues of accessibility, mobility, roadway safety, and congestion relief for motorists, transit riders, cyclists and pedestrians in a manner that stimulates economic vitality, promotes environmental sustainability, and increases quality of life for Vallejo residents by incorporating a Divergent Diamond Interchange design configuration.

If you have any questions about the open house or the project, please visit the project website here, view the fact sheet here, call (925) 436-5075, or send an email to SR37-FairgroundsPIO@portal3.pbid.com.

Date: May 8, 2025
District: 4
Contact:  Vince Jacala
Phone:  (510) 385-7069

Eastbound and Westbound- I-80 Fairfield Testing New Express Lanes Signs
Starts Friday, May 9, 9:00 AM-5:00 PM Mondays – Fridays
Motorists will NOT be Charged During Testing

SOLANO COUNTY  – Caltrans and its transportation partner, the Metropolitan Transportation Commission (MTC) will be testing signage for the new I-80 Solano Express Lanes. The signs are located on eastbound and westbound I-80 between Red Top Road and Manuel Campos Parkway in Fairfield.

During testing, the signs will be illuminated with test messaging. The signage testing will occur starting Friday, May 9 until tentatively late summer 2025. Motorists will see test messaging on the signs each day beginning at 9:00 AM until 5:00 PM, Mondays-Fridays.

Motorists will NOT be charged to use the new far-left traffic lanes on I-80 in Fairfield and Vacaville during this testing phase. They will continue to be allowed to use the far-left traffic lanes on eastbound and westbound I-80 in Fairfield and Vacaville as a temporary car-pool lane during commute hours and use those same lanes as a traffic lane with no restrictions during non-commute hours.

After the testing phase is completed, sometime in late 2025, the signs will be activated and motorists using the new express lanes, the far left traffic lane, will be charged based on Express Lane charging criteria.

Additional Project and Road Condition Information
For additional information regarding the I-80 Solano Express Lanes Project go to our project website at: Solano I-80 Express Lanes Project | Caltrans

For the latest road and highway conditions statewide got to Caltrans quick maps:
https://quickmap.dot.ca.gov/

Or call 1-800-427-ROAD or I-800-427-7623.

Caltrans thanks the public for its patience and understanding as we work to maintain and improve our state’s highways, bridges and tunnels.

Date: April 30, 2025
Agency: Solano Transportation Authority & Caltrans, District 4-Bay Area
Contact:  Sean Person, Vince Jacala
Phone:  (707) 399-3217, (510) 385-7069

State Route 37/Fairgrounds Drive Interchange – Vallejo
Construction Shifts into Gear – May 2025
Watch for Traffic Lane Shifts/Overnight Ramp Closures

SOLANO COUNTY  – The Solano Transportation Authority (STA), in close coordination with its transportation partner, the California Department of Transportation (Caltrans), has started 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 recently started construction in April 2025. The site is near the Six Flags Discovery Kingdom Theme Park and the Solano County Fairgrounds. Major public impacts to SR 37 and Fairgrounds Drive are scheduled to start in May 2025. In the coming weeks, motorists will begin to see lane traffic shifts, overnight ramp closures, tree removal, signage installation, and various temporary lane closures.

The following construction-related activities are set to happen starting in May 2025.

• Motorists on Fairgrounds Drive at SR 37 should watch for temporary traffic lane shifts.
• Eastbound on and off ramps at SR 37/Fairgrounds Drive will be closed overnight with detours. Closures are scheduled from 10:00 PM until 5:00 AM.
• The westbound off-ramp from SR 37 to Fairgrounds Drive will be closed nightly from 11:00 PM – 5:00 AM.
• The SolTrans bus stop at the on-ramp to Westbound SR 37 will be temporarily relocated a few feet away.

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

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

STA and Caltrans will provide additional project details as soon as information becomes available.

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-improvementproject/.

STA and Caltrans thank the motoring public for its patience and understanding as we work to improve and maintain our state’s highways.