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California Department of Transportation

10/09/2026 | Press release | Archived content

Traffic Advisory San Joaquin County 10/09/26

Traffic Advisory San Joaquin County 10/09/26

Published: Oct 09, 2026

State Route 4 - Lane Closures
One-Way Traffic Control

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:

  • Overnight, one-way traffic control from Whiskey Slough in Holt to the Old River Bridge (San Joaquin/Contra Costa County line) for paving work beginning Sunday, October 11, through Friday, Oct. 16, from 8:00 p.m. until 4:00 a.m.
    • Plan Ahead - 36-hour full highway closure of SR-4 from Roberts Road to Old River Bridge to begin at 10:00 p.m. on Friday, October 23, until 10:00 a.m. on Sunday, October 25, 2026.
    • The above closures are required as part of the SR-4 Delta Pavement Improvement Project. For details visit https://dot.ca.gov/caltrans-near-me/district-10/district-10-current-projects/10-1f320
  • Overnight, intermittent one-way traffic control from SR-99/Golden Gate Avenue to the San Joaquin/Stanislaus County line for pavement work beginning Sunday, Oct. 11, through Friday, Oct. 16, 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, Oct. 11, through Saturday, Oct. 17, 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, Oct. 11, through Saturday, Oct. 17, 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 Striping Operations

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 striping operations beginning Tuesday, Oct. 13, through Friday, Oct. 16, from 8:00 p.m. until 5:00 a.m.
  • Overnight, intermittent one-way traffic control from Duncan Road to Flood Road/Front Street for striping operations beginning Tuesday, Oct. 13, through Friday, Oct. 16, from 8:00 p.m. until 5:00 a.m.

State Route 99 - Lane & Ramp Closures
Tree Work And Pavement Repairs Next Week

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:

  • Closure of the #3 (right) lane of northbound SR-99 from the Stanislaus/San Joaquin County line to Austin Road for tree work beginning Monday, Oct. 12, through Friday, Oct. 16, from 8:30 a.m. until 2:30 p.m.
  • Full on-ramp closure from Cherokee Road to northbound SR-99 for pavement work on Tuesday, Oct. 13, from 6:00 a.m. until 4:00 p.m.
  • Full on-ramp closure from Wilson Way to northbound SR-99 for pavement work on Monday, Oct. 12, from 6:00 a.m. until 4:00 p.m.
  • Alternating lane closures on northbound SR-99 at Calaveras River for pavement work beginning Monday, Oct. 12, through Tuesday, Oct. 13, from 6:00 a.m. until 4:30 p.m.

Interstate 205 - Ramp Closures
Overnight Closures For Drainage Work In Tracy

San Joaquin County - The California Department of Transportation (Caltrans) will perform various closures on Interstate 205 (I-205) for maintenance and construction work within San Joaquin County. Work will occur as follows:

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, Oct. 11, through Friday, Oct. 16, 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, Oct. 11, through Friday, Oct. 16, from 7:00 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 October 09, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on October 12, 2026 at 23:02 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]