849
SAN JOAQUIN COUNTY – Caltrans will perform two, 55-hour full highway closures of State Route 4 (SR-4) from Roberts Road to the San Joaquin/Contra Costa County line, east of Discovery Bay as required for construction of the SR-4 Delta Pavement Improvement Project.
This project will make necessary upgrades and repairs of approximately nine miles of existing highway between the county line and South Whiskey Slough Road in Holt, just west of Stockton.
Weekend closures will occur beginning:
- 10:00 p.m. on Friday, July 10, until 5:00 a.m. on Monday, July 13,2026
- 10:00 p.m. on Friday, July 17, until 5:00 a.m. on Monday, July 20, 2026.
During these closures, the following detour will be required;
STATE ROUTE 4 DETOUR INFORMATION:
- Westbound SR-4 travelers: From SR 4, take Roberts Road south, continue west on Howard Road, south to Tracy Boulevard to I-205 west, exit Mountain House Parkway, travel north to Byron Road to SR-4.
- Eastbound SR-4 travelers: From SR 4, take Byron Road south to Mountain House Parkway, south to I-205 East, exit Tracy Blvd, north to Howard Road, east to Roberts Road, north to SR-4.
For a look at other District 10 projects, click here
Previous
- April 2026 – Two, 55-Hour Full Highway 4 Closures Scheduled
