Welcome back to the Solano County Caltrans E-Newsletter!

What's Happening Around Town?

UPDATE ON CURRENT AND FUTURE PROJECTS

🦺 I-80 Express Lane Project

Where: Between Red Top Road, Fairfield, and Leisure Town Road, Vacaville

When: On Schedule to be completed by late 2025

Why: New express lanes mean less traffic and faster commutes! This project is over 75% complete, with remaining work involving roadway and bridge widening, new retaining walls, sound walls, electrical work, barriers, drainage work, overhead sign installation, planting, new paving, and striping. The construction work is being performed during the day and night under lane closures.

Also of note: Where possible, Caltrans is working to provide early access to the new express lanes in the form of High Occupancy Vehicle (HOV) lanes while final installation of tolling equipment is completed. The eastbound (HOV) lane is projected to open in late June which will give motorist a fifth lane to alleviate traffic in Fairfield and Vacaville. Testing will be happening Monday through Friday throughout the summer. During testing, the signs will be illuminated with test messaging from 9 a.m. through 5 p.m. Motorists will NOT be charged to use the new far-left traffic lanes on I-80 in Fairfield and Vacaville during the testing phase. They will continue to be allowed to use the far-left traffic lane during commute hours and use those same lanes as a traffic lane with no restrictions during non-commute hours.

The new express lanes are estimated to be fully up and running by late 2025.

🦺 State Route 29 Complete Streets Project

Where: SR-29/Sonoma Blvd, Vallejo

When: Groundbreaking estimated for Summer 2025

Why: Complete Streets projects prioritize the safety of all road users by ensuring that streets are designed for ADA accessibility, pedestrians, cyclists, and transit riders. By encouraging active transportation and reducing traffic congestion, these projects help lower environmental impact and improve community livability and economic growth by creating attractive, accessible, and sustainable streetscapes.

This past September, Gov. Gavin Newsom signed the Complete Streets Bill, S.B. 960, which prioritizes improvements for pedestrians, bike riders, and public transit users. Bidding for contracts is slated to open in May 2025. Currently there is no contractor assigned to the project.

🦺 Resilient SR37

Where: SR-37 between Mare Island and Sears Point

When: Construction slated to begin in 2026.

Why: State Route 37 is an important regional connection linking the north, east and west San Francisco Bay Region following along the northern shore of San Pablo Bay. This 21-mile-long roadway from US 101 to I-80 connects job markets and housing within Marin, Sonoma, Napa and Solano counties.

The future of the SR-37 corridor requires finding solutions to traffic congestion, periodic flooding, and rising sea levels. But it will also require balancing transportation needs with protecting and enhancing sensitive marshland habitats. Planning a long-term solution presents an opportunity to provide bicycle, pedestrian, transit, and carpool options for all travelers, and enhance the quality of life for residents and build stronger local and regional economy for all. Caltrans is working with its partner agencies, The Metropolitan Transportation Commission and the four North Bay County Transportation Agencies to develop a more resilient corridor.

🦺 Fairground Diamond Interchange Project

Where: SR-37/Fairgrounds Drive in Vallejo

When: December 2025

Why: This project will alleviate current and future traffic congestion and enhance safety for all transportation modes, including pedestrians, bicycles, and scooters. The divergent diamond improves mobility equity and provides better access to major attractions such as Six Flags, upcoming Solano development, and local and regional bus services. These improvements will benefit commuters traveling to Sacramento, the San Francisco Bay Area, Napa County, and all within the city of Vallejo.

Construction is underway and the project is projected for completion in Spring 2026

🦺 State Route 12 Pavement Rehabilitation Segment 1

Where: SR-12, from Suisun City to Rio Vista

When: Completed in December 2024.

Why: This project addresses safety concerns, ride quality, rehabilitate and extend the pavement service life of the pavement. This project has been completed and was accepted on Dec. 12, 2024.

🦺 State Route 12 Pavement Rehabilitation Segment 2

Where: SR-12, from Suisun City to Rio Vista

When: Estimated construction start by Summer 2027.

Why: This project addresses safety concerns, ride quality, rehabilitate and extend the pavement service life of the pavement. This project start date was extended a year following the acquisition of additional parcels.

🦺 State Route 113 Pavement Rehabilitation Segment 1&2

Where: 113, Seg. 1 from SR-12 to Cook Ln
Seg. 2 Cook Ln to Chestnut St in Dixon

When: Currently in the environmental phase.

Why: This project will focus on necessary upgrades to improve road conditions and ensure long-term reliability.

🦺 Solano County Polyester Concrete Overlay Project

Where: Various Locations on State Routes 12, 37, 80, 113, 505, & 780

When: Currently in the environmental phase.

Why: This project will focus on necessary upgrades to enhance the durability and safety of highways structures. Applying a polyester concrete overlay and replacing joint seals will improve the road surface, protect the structure from water damage, and ensure long-term reliability with reduced maintenance needs.

🦺 Westbound Truck Scale Project

Where: Interstate 80 in Cordelia.

When: Groundbreaking estimated for Spring 2025.

Why: This project will focus on upgrading the outdated Cordelia Truck Scales along Westbound I-80, originally built in 1958. The current facility leads to traffic backups. The new truck scales will feature improved access ramps and modern equipment to inspect trucks more efficiently, enhancing safety and ensuring smoother traffic flow 24/7.

Although construction of the new westbound truck scale is still well down the road, tree work recently began in the general area in preparation of more work to come. Stay tuned!

 

DEAR DELTA: WHAT YOU NEED TO KNOW FOR THE YEAR AHEAD

Living in the Sacramento-San Joaquin Delta is a unique experience and has its many perks, filled with natural beauty and vital waterways, but sometimes it also brings unique challenges—especially when it comes to transportation. To maintain the safety and efficiency of our transportation network, important rehabilitation work is underway or scheduled for several key bridges over the coming year. While this work is necessary for the safety and longevity of our infrastructure, we understand the frustration and disruptions it may cause. Here’s what you need to know.

Why is this happening?

The Delta’s infrastructure plays a critical role in Northern California, connecting Solano, Sacramento, and San Joaquin counties. This includes State Route 4 (SR-4), which runs parallel to the Delta and features the Middle River and Old River Bridge, providing crucial links in San Joaquin County. State Route 12 (SR-12), historically known as the Victory Highway, includes the Rio Vista, Mokelumne, and Potato Slough Bridges, connecting Fairfield and Lodi while serving as a key artery for agricultural and commuter traffic. State Route 84 (SR-84) crosses key waterways via the Real McCoy II Ferry and the Miner Slough Bridge. State Route 160 (SR-160) follows the Sacramento River and features several crossings, including the Antioch, Isleton, Paintersville, Steamboat Slough, and Three Mile Slough Bridges. State Route 220 (SR-220) links SR-84 and SR-160. All these state routes are vital for residents, agriculture, tourism, and the economy with some structures even celebrating their centennial. Nevertheless, your bridges require critical rehabilitation to ensure they remain safe and reliable for years to come. Concurrently, ferry services will be impacted by a shortage of ferry captains, making it harder to maintain regular schedules. We’re doing everything we can to address these issues, but your understanding and patience are key as we navigate these challenges together. 

Explore the Delta-Specific Website

To keep the community informed about these ongoing projects, we’ve developed a dedicated resource: the Delta Region Website. This platform offers updates on construction schedules, detour routes, and ferry service changes. You can also explore detailed maps of the region’s highways, bridges, and ferry services. We hope this resource will help you plan your travel and stay updated with the latest developments. Additionally, you will find photos and videos about the Delta and all the types of work Caltrans performs in the region.

Stay Connected

For real-time updates, please visit the Caltrans Quickmaps app, Social Media platforms and for more information the Delta Projects Website

CaltransDeltaProjects.com

or contact us directly:

Delta Ferries Real Time Updates Hotline:
(510) 622-0120

Submit a Maintenance Request:
Customer Service Request

For Maintenance related questions contact:
District 4 (Solano County):
vince.jacala@dot.ca.gov

For Construction related questions contact:
District 3 (Sacramento County):
dennis.keaton@dot.ca.gov

For Maintenance Support:
csr.dot.ca.gov

Thank you for your patience as we work together to maintain and improve our infrastructure safety for the future.

Setting the PACE: Public Affairs Customer Engagement Site is Now Live!

District 4 is proud to announce the launch of our new Customer Service Request (CSR) platform. PACE, the Public Affairs Customer Engagement site, provides a regularly updated breakdown of services requested and rendered across the district.

• The CSR dashboard aims to provide an overview of the responsiveness to maintenance services requested across the nine Bay Area counties.
• The data represented as month-to-date falls within a rolling 30-day Service Level Agreement (SLA) and is updated weekly.
• We strive to close 60% (or more) of all monthly service requests received via the CSR website portal.
• For more information or to leave comments/suggestions, please contact D4CSLTEAM@dot.ca.gov.
• To report a highway issue/problem, please submit a CSR ticket through the Customer Service Request Form.

The Solano County newsletter will be distributed on a regular schedule.

For 24/7 traffic updates, please visit 511.org: https://x.com/511SFBay
For real-time information, visit Caltrans QuickMap: https://quickmap.dot.ca.gov
Follow us on X: https://x.com/CaltransD4
Or call 1-800-472-7623, 1-800-427-ROAD for state highway conditions statewide.