California Department of Transportation

08/07/2026 | Press release | Distributed by Public on 08/07/2026 15:59

Traffic Advisory San Joaquin County 08/07/26

Traffic Advisory San Joaquin County 08/07/26

Published: Aug 07, 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.
  • Overnight, one-way traffic control from Whiskey Slough Road in Holt to the Old River Bridge for construction beginning Sunday, August 9, through Friday, August 14, from 8:00 p.m. until 4:00 a.m.
    • Plan Ahead: 12-hour full highway closure from Roberts Road to Old River Bridge scheduled from 7:00 a.m. until 7:00 p.m. on Sunday, August 9, 2026.
    • Plan Ahead: 55-hour full highway closure from Roberts Road to Old River Bridge scheduled from 10:00 p.m. on August 14, until 5:00 a.m. on August 17, 2026.
  • Overnight, intermittent one-way traffic control from SR-99 to the San Joaquin/Stanislaus County line for pavement work beginning Sunday, August 9, through Friday, August 14, from 7:00 p.m. until 7:00 a.m.

Interstate 5 - Ramp & Lane Closures
Closures From Downing Avenue 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 Sunday, August 9, through Saturday, August 15, 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 Sunday, August 9, through Saturday, August 15, 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 26 - Lane Closures
One-Way Traffic Control For Pavement Work

San Joaquin County - The California Department of Transportation (Caltrans) will perform various closures on State Route 26/Fremont Street (SR-26) for maintenance and construction work within San Joaquin County. Work will occur as follows:

  • Overnight, intermittent one-way traffic control from SR-99 to Murray Road for shoulder work beginning Sunday, August 9, through Friday, August 14, from 8:00 p.m. until 5:00 a.m.
  • Long-term closure of the right shoulder at Jack Tone Road for pavement work through August 12, 2026.

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 Sunday, August 9, through Friday, August 14, from 9:00 p.m. until 6:00 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 on- and off-ramp closures on eastbound I-580 at Patterson Pass for construction beginning Sunday, August 9, through Friday, August 14, from 9:00 p.m. until 5:00 a.m.
  • Overnight, full on- and off-ramp closures on westbound I-580 at Patterson Pass for construction beginning Sunday, August 9, through Friday, August 14, 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 August 07, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on August 07, 2026 at 21:59 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]