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California Department of Transportation

06/26/2026 | Press release | Distributed by Public on 06/26/2026 15:47

Traffic Advisory San Joaquin County 06/26/26

Traffic Advisory San Joaquin County 06/26/26

Published: Jun 26, 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.
  • One-way traffic control from Cordes Ranch Road to Roberts Island Road for bridge work beginning Sunday, June 28, through Monday, June 29, from 12:00 p.m. until 4:00 p.m.
  • Overnight, intermittent one-way traffic control from SR-99 to the San Joaquin/Stanislaus County line for pavement work beginning Sunday, June 28, through Thursday, July 2, 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 Sunday, June 28, through Thursday, July 2, 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, June 28, through Thursday, July 2, 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 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 connector ramp closures from northbound SR-99 to westbound SR-120/Yosemite Avenue for striping operations beginning Sunday, June 28, through Thursday, July 2, from 9:00 p.m. until 4:00 a.m.
  • Overnight, full off-ramp closures from southbound SR-99 at Golden Gate Avenue for excavation work beginning Wednesday, July 1, through Thursday, July 2, from 8:00 p.m. until 5:00 a.m.

State Route 120 - Ramp Closures
Overnight Closures For Construction In Manteca

San Joaquin County - The California Department of Transportation (Caltrans) will perform various closures on State Route 120 (SR-120) for maintenance and construction work within San Joaquin County. Work will occur as follows:

  • Overnight, connector ramp closures from eastbound SR-120/Yosemite Avenue to southbound SR-99 for striping operations beginning Sunday, June 28, through Monday, June 29, from 11:00 p.m. until 5:00 a.m., and from Monday, June 29, through Thursday, July 2, from 10:00 p.m. until 5:00 a.m.
  • Overnight, connector ramp closures from eastbound SR-120/Yosemite Avenue to northbound SR-99 for striping operations beginning Sunday, June 28, through Thursday, July 2, from 10:00 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 on- and off-ramp closures on eastbound I-580 at Patterson Pass for construction beginning Sunday, June 28, through Thursday, July 2, 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, June 28, through Thursday, July 2, 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 June 26, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on June 26, 2026 at 21:48 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]