California Department of Transportation

03/27/2026 | Press release | Distributed by Public on 03/27/2026 16:18

Traffic Advisory San Joaquin County 03/20/26

Traffic Advisory San Joaquin County 03/20/26

Published: Mar 27, 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, March 29, through Thursday, April 2, 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, March 29, through Friday, April 3, from 9:00 p.m. until 5:00 a.m.
  • Overnight, full on-ramp closures from Center Street, Stanislaus Street, Wilson Way and Filbert Street to westbound SR-4/Crosstown Freeway for pavement work beginning Monday, March 30, through Friday, April 3, 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, March 30, through Friday, April 3, from 9:00 p.m. until 6:00 a.m.

Interstate 5 - Ramp & Lane Closures
Closures From Crosstown Freeway 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 connector ramp closures from northbound I-5 to eastbound and westbound SR-4/Crosstown Freeway for bridge work beginning Sunday, March 29, through Friday, April 3, from 8:00 p.m. until 6:00 a.m. (eastbound) and from 9:00 p.m. until 5:00 a.m. (eastbound.)
  • Overnight, full connector ramp closures from southbound I-5 to SR-4/Crosstown Freeway for attenuator (barrels) repair work beginning Thursday, April 2, through Friday, April 3, from 10:30 p.m. until 4:30 a.m.
  • Overnight, full on-ramp closures from Fremont Street to southbound I-5 for attenuator (barrels) repair work beginning Thursday, April 2, through Friday, April 3, from 10:30 p.m. until 4:30 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, March 29, through Friday, April 3, 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, March 29, through Friday, April 3, 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 northbound and southbound SR-99 from Jack Tone Road to SR-120/Manteca Bypass for bridge work beginning Sunday, March 29, through Friday, April 3, from 8:00 p.m. until 4:00 a.m. (northbound) and from 9:00 p.m. until 6:00 a.m. (southbound.)
  • Long-term, full off-ramp closure from northbound SR-99 at Austin Road for construction beginning on Sunday, March 29, through Sunday, April 12, 2026.
  • Overnight, full connector ramp closures from northbound SR-99 to westbound SR-120/Manteca Bypass for utility work beginning Monday, March 30, through Wednesday, April 1, from 9:00 p.m. until 4:00 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 Ramp Closures 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, full connector ramp closures from eastbound SR-120/Manteca Bypass to southbound SR-99 for utility work beginning on Monday, March 30, through Wednesday, April 1, 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 closure of eastbound I-580 at Patterson Pass/International Parkway for construction on Wednesday, April 1, from 12:00 a.m. until 6:00 a.m.
  • Overnight, full closures of westbound I-580 at Patterson Pass/International Parkway for construction beginning Monday, March 30, through Friday, April 3, from 9:00 p.m. until 3:00 a.m.
  • Overnight, full on- and off-ramp closures on eastbound I-580 at Patterson Pass for construction beginning Sunday, March 29, through Monday, March 30, 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, March 29, through Monday, March 30, 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 March 27, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on March 27, 2026 at 22:19 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]