Traffic Advisory San Joaquin County 05/01/26

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:

• Overnight, intermittent one-way traffic control from SR-99 to the San Joaquin/Stanislaus County line for fence work beginning Tuesday, May 3, through Friday, May 8, from 7:00 p.m. until 7:00 a.m.
• • The above closure is required as part of the SR-4 Farmington Highway Improvement Project. For details visit https://dot.ca.gov/caltrans-near-me/district-10/district-10-current-projects/10-1c050.
• 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.
  • Plan Ahead: 55-hour full highway closures from Roberts Road to Old River Bridge scheduled for July 10-13 and July 17-20, 2026.
• Overnight, full connector ramp closures from eastbound SR-4/Crosstown Freeway to southbound Interstate 5 for bridge work beginning Tuesday, May 3, through Friday, May 8, 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 Tuesday, May 3, through Friday, May 8, 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 Tuesday, May 3, through Friday, May 8, from 7:00 p.m. until 5:00 a.m.
• Overnight, full on-ramp closures from Stanislaus Street, Wilson Way and Filbert Street to eastbound SR-4/Crosstown Freeway for pavement work beginning Tuesday, May 3, through Friday, May 8, 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 and southbound I-5 for bridge work beginning Tuesday, May 3, through Friday, May 8, from 8:00 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 Tuesday, May 3, through Friday, May 8, from 9:00 p.m. until 5:00 a.m. (eastbound) and from 8:00 p.m. to 6:00 a.m. (westbound.)
• Overnight, alternating lane closures on northbound and southbound I-5 from Hammer Lane to the San Joaquin/Sacramento County line for construction beginning Tuesday, May 3, through Saturday, May 9, 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 Tuesday, May 3, through Saturday, May 9, 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 & State Route 88 - Lane Closures
One-Way Traffic Control For Maintenance Work

San Joaquin County - The California Department of Transportation (Caltrans) will perform various closures on State Route 26 (SR-26) and SR-88 for maintenance and construction work within San Joaquin County. Work will occur as follows:

State Route 26

• One-way traffic control on SR-26 from Duncan Road to Ione Street for landscape and irrigation work on Monday, May 4, from 7:00 a.m. until 3:00 p.m.

State Route 88

• One-way traffic control on SR-88 from Locke Road to Cherry Street for pavement work on Thursday, May 7, from 7:00 a.m. until 3:00 p.m.

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 construction beginning Monday, May 4, through Friday, May 8, from 8:00 p.m. until 4:00 a.m. (northbound) and from 9:00 p.m. until 6:00 a.m. (southbound.)
• • 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 Monday, May 4, through Friday, May 8, from 8:00 p.m. until 4:00 a.m.
• Overnight, on-ramp closure from eastbound SR-120/Yosemite Avenue to northbound and southbound SR-99 for k-rail work beginning Monday, May 4, through Friday, May 8, from 10:00 p.m. until 5:00 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.

Interstate 205 - Ramp Closures
Overnight Closures For Bridge 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:

• Overnight, full on-ramp closures from Grant Line Road to eastbound I-205 for bridge work beginning Monday, May 4, through Tuesday, May 5, from 8:00 p.m. until 6:00 a.m.
• Overnight, alternating lane closures on eastbound I-205 from Janney Road to Paradise Road for bridge work beginning Monday, May 4, through Tuesday, May 5, from 10:00 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, May 3, through Friday, May 8, 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, May 3, through Friday, May 8, from 9:00 p.m. until 3:30 a.m.
• • For more information on this city of Tracy-led, Interchange Improvement project, please visit https://dot.ca.gov/caltrans-near-me/district-10/district-10-current-projects/10-1e220.