State Route 4 Delta Pavement Improvement Project
Project Description
This CAPM project on State Route (SR) 4 from Contra Costa County Line to 0.2 Mile East of South Whiskey Slough Road proposes to repair failed areas of pavement (dig outs) and then cold plane and overlay the existing pavement width from the eastbound edge of pavement (EP) to the west bound EP. Shoulder backing will be placed along the EPs in both directions. It also proposes to upgrade departure barriers, electrical elements, traffic management systems, lighting systems, and replace sign panels.
Project Benefits
Purpose and Need
The purpose of this project is to preserve and extend the life of the existing pavement, as well as improving the ride quality. The project is needed because the pavement within the project limits is exhibiting major distress and unacceptable ride quality, which if left uncorrected, would continue to deteriorate.
Current Schedule
06/08/2021 (A)
Project Study Report (M010)
11/17/2023 (A)
Project Approval & Environmental Document (M200)
02/04/2025 (A)
Right of Way Certification (M410)
06/24/2025 (A)
Ready to List (M460)
12/25/2025 (A)
Approved Construction Contract (M500)
02/02/2027 (T)
Project Completion (M600)
Funding Source
This project is programmed in the 2022 State Highway Operation and Protection Program (SHOPP) under the 201.121 CAPM Program for expedited delivery in the 2024/2025 fiscal year.
Project Status
Project is currently in construction phase which began in December 2025. The contractor is planning to start work in the field from late March 2026 and the target to complete construction is February 2027.
Project Cost/Programmed (x$1,000):
| Programed Project Cost | Capital $ | Support $ |
|---|---|---|
| Project Approval & Environmental Document | $1,164 | |
| Plans, Specifications, & Estimates | $2,203 | |
| Right of Way | $42 | $47 |
| Construction | $15,909 | $2,452 |
| Projected Cost as of February 19, 2026: | Planned $ | Expended $ |
|---|---|---|
| Project Approval & Environmental Document | $1,164 | $694 |
| Plans, Specifications, & Estimates | $2,203 | $2,172 |
| Right of Way | $47 | $28 |
| Construction | $2,452 | $35 |
Public Information Office
Phone: (209) 948-7977
Email: District10PublicAffairs@dot.ca.gov
Address: P.O. Box 2048, Stockton, CA 95201-2048
Title VI Information
The California Department of Transportation (Caltrans) assures that no person shall, on the basis of race, color, or national origin, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity receiving Federal financial assistance, as required by Title VI of the Civil Rights Act of 1964 , as amended, the Civil Rights Restoration Act of 1987 , and Federal Executive Order 12898 (Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations).
Caltrans will make every effort to ensure nondiscrimination in all of its programs and activities, whether they are federally funded or not, and that services and benefits are fairly distributed to all people, regardless of race, color, or national origin. In addition, Caltrans will facilitate meaningful participation in the transportation planning process in a nondiscriminatory manner.
- Title VI Brochure (English, PDF)
- Title VI Brochure (Spanish, PDF)
- Title VI of the Civil Rights Act of 1964 (Caltrans Information)
