California Department of Transportation

07/03/2026 | Press release | Distributed by Public on 07/03/2026 13:33

Traffic Advisory San Joaquin County 07/03/26

Traffic Advisory San Joaquin County 07/03/26

Published: Jul 03, 2026

State Route 4 - Lane & Ramp Closures
Long-Term One-Way Traffic Control At Old River Bridge

San Joaquin County - The California Department of Transportation (Caltrans) will perform various closures on State Route 4 (SR-4) for maintenance and construction work within San Joaquin County. Work will occur as follows:

  • Long-term, 24-hour, one-way traffic control will be implemented on SR-4 at the Old River Bridge (San Joaquin/Contra Costa County line) for construction through November 2026.
    • Vehicles measuring over 34 feet in length are strongly recommended to seek alternate routes. SR-12 or Interstate 205 are highway alternatives between Discovery Bay and Stockton.
    • Plan Ahead: 55-hour full highway closures from Roberts Road to Old River Bridge scheduled for July 10-13 and July 17-20, 2026.
  • Overnight, one-way traffic control from Whiskey Slough (Holt) to the Old River Bridge (San Joaquin/Contra Costa County line) for construction beginning Monday, July 6, through Thursday, July 9, from 8:00 p.m. until 4:00 a.m.
  • Overnight, intermittent one-way traffic control from SR-99 to the San Joaquin/Stanislaus County line for pavement work beginning Monday, July 6, through Friday, July 10, from 7:00 p.m. until 7:00 a.m.

Interstate 5 - Ramp & Lane Closures
Closures From Hammer Lane To Sacramento County Line

San Joaquin County - The California Department of Transportation (Caltrans) will perform various closures on Interstate 5 (I-5) for maintenance and construction work within San Joaquin County. Work will occur as follows:

  • Overnight, alternating lane closures on northbound and southbound I-5 from Hammer Lane to the San Joaquin/Sacramento County line for construction beginning Monday, July 6, through Saturday, July 11, from 9:00 p.m. until 5:00 a.m. (northbound) and from 9:00 p.m. until 6:00 a.m. (southbound).
  • Overnight, alternating full on and off-ramp closures at Hammer Lane, Eight Mile Road, SR-12 (Flag City), Turner Road, Peltier Road, and Walnut Grove/Thornton Road for construction beginning Monday, July 6, through Saturday, July 11, from 9:00 p.m. until 5:00 a.m. (northbound) and from 9:00 p.m. until 6:00 a.m. (southbound).

The above listed lane and ramp closures on I-5 between Hammer Lane and the San Joaquin/Sacramento County line are required as part of the I-5 Anchor Pavement Project that will improve 34 miles of existing pavement and shoulders from Hammer Lane in Stockton to the San Joaquin/Sacramento County line. The project will also replace on- and off-ramps with upgraded concrete at Eight Mile Road, State Route 12, Turner Road, Peltier Road, and Thornton Road/Walnut Grove Road. For project details visit https://dot.ca.gov/caltrans-near-me/district-10/district-10-current-projects/10-1e300.

State Route 88 - Lane Closures
One-Way Traffic Control For Bridge Work At Bear Creek

San Joaquin County - The California Department of Transportation (Caltrans) will perform various closures on State Route 88 (SR-88) for maintenance and construction work within San Joaquin County. Work will occur as follows:

  • Overnight, one-way traffic control at Bear Creek for bridge work beginning Monday, July 6, through Friday, July 10, from 8:00 p.m. until 6:00 a.m.

State Route 99 - Ramp Closures
Ramp Closures For Construction In Manteca & Stockton

San Joaquin County - The California Department of Transportation (Caltrans) will perform various closures on State Route 99 (SR-99) for maintenance and construction work within San Joaquin County. Work will occur as follows:

  • Overnight, full off-ramp closures from northbound and southbound SR-99 at Golden Gate Avenue for roadway excavation work beginning Monday, July 6, through Friday, July 10, from 8:00 p.m. until 5:00 a.m.

Interstate 580 - Ramp Closures
Overnight Closures At Patterson Pass For Construction

San Joaquin County - The California Department of Transportation (Caltrans) will perform various closures on Interstate 580 (I-580) for maintenance and construction work within San Joaquin County. Work will occur as follows:

  • Overnight, full off-ramp closures on eastbound I-580 at Patterson Pass for construction beginning Monday, July 6, through Friday, July 10, from 9:00 p.m. until 5:00 a.m.
  • Overnight, full off-ramp closures on westbound I-580 at Patterson Pass for construction beginning Monday, July 6, through Friday, July 10, from 9:00 p.m. until 3:30 a.m.

Motorists should expect 5-to-10-minute delays and use alternate routes whenever possible. All work is scheduled to occur as listed but is subject to change due to traffic incidents, weather, availability of equipment/materials, and construction-related issues.

For the safety of workers and other motorists, please Be Work Zone Alert. Caltrans also reminds motorists to #KnowBeforeYouGo by checking QuickMaps on your mobile device or visit quickmap.dot.ca.gov for real-time highway conditions.

California Department of Transportation published this content on July 03, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on July 03, 2026 at 19:33 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]