California Department of Transportation

04/16/2026 | Press release | Distributed by Public on 04/16/2026 16:02

Traffic Advisory San Joaquin County 04/16/26

Traffic Advisory San Joaquin County 04/16/26

Published: Apr 16, 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 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, full connector ramp closures from eastbound SR-4/Crosstown Freeway to southbound Interstate 5 for bridge work beginning Sunday, April 19, through Saturday, April 25, from 8:00 p.m. until 6:00 a.m.
  • Overnight, full connector ramp closures from westbound SR-4/Crosstown Freeway to southbound Interstate 5 for bridge work beginning Sunday, April 19, through Saturday, April 25, from 9:00 p.m. until 5:00 a.m.
  • Overnight, full on-ramp closures from Stanislaus Street, Wilson Way and Filbert Street to westbound SR-4/Crosstown Freeway for pavement work beginning Monday, April 20, through Friday, April 24, from 7:00 p.m. until 5:00 a.m.
  • Overnight, full on-ramp closures from El Dorado Street, Stanislaus Street, Wilson Way and Filbert Street to eastbound SR-4/Crosstown Freeway for pavement work beginning Monday, April 20, through Friday, April 24, from 9:00 p.m. until 6:00 a.m.

Interstate 5 - Ramp & Lane Closures
Closures From Charter Way 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, full on-ramp closures from SR-4/Charter Way to northbound I-5 for bridge work beginning Sunday, April 19, through Saturday, April 25, from 8:00 p.m. until 5:00 a.m.
  • Overnight, full off-ramp closures from southbound I-5 to SR-4/Charter Way for bridge work beginning Sunday, April 19, through Saturday, April 25, from 9:00 p.m. until 5:00 a.m.
  • Overnight, full connector ramp closures from northbound I-5 to eastbound and westbound SR-4/Crosstown Freeway for bridge work beginning Sunday, April 19, through Saturday, April 25, from 8:00 p.m. until 5:00 a.m.
  • Overnight, alternating lane closures on northbound and southbound I-5 from Hammer Lane to the San Joaquin/Sacramento County line for construction beginning Sunday, April 19, through Saturday, April 25, 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, April 19, through Saturday, April 25, 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 - Lane Closures
Overnight Closures For Construction In Manteca

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, alternating lane closures on southbound SR-99 at SR-120/Manteca Bypass for construction beginning Saturday, April 18, through Sunday, April 19, from 9:00 p.m. until 9:00 a.m.
    • For any required detours and more information on this San Joaquin Council of Governments-led, SR-120/99 Interchange Improvement project, please visit https://www.sjcog.org/677/ABOUT.

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 westbound SR-120/Manteca Bypass to northbound I-5 for electrical work beginning Sunday, April 19, through Friday, April 24, from 8:00 p.m. until 4:00 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, April 19, through Friday, April 24, 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, April 19, through Friday, April 24, 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 April 16, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on April 16, 2026 at 22:02 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]