Traffic Advisory San Joaquin County 01/23/26

State Route 4 – Ramp Closures
Overnight Ramp Closures On Crosstown Freeway In Stockton

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, full on-ramp closures from Fremont Street to westbound SR-4/Crosstown Freeway for pavement work beginning Sunday, January 25, through Friday, January 30, from 7:00 p.m. until 5:00 a.m.

Interstate 5 – Lane & Ramp Closures
Closures From March 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:

• Full off-ramp closure from northbound I-5 at March Lane for pavement work on Tuesday, January 20, from 9:00 a.m. until 2:00 p.m.
• Full on-ramp closure from March Lane to northbound I-5 for pavement work on Wednesday, January 21, from 9:00 a.m. until 2:00 p.m.
• Overnight, alternating lane closures on northbound and southbound I-5 from Hammer Lane to the San Joaquin/Sacramento County line for construction beginning Tuesday, January 20, through Saturday, January 24, 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, January 20, through Saturday, January 24, 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 – Full Highway Closures
Overnight Highway 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, full closures of northbound SR-99 at Austin Road for bridge work beginning Sunday, January 25, through Saturday, January 31, from 11:00 p.m. until 4:00 a.m.
• Overnight, full closures of southbound SR-99 at Austin Road for bridge work beginning Monday, January 26, through Saturday, January 31, from 11:00 p.m. until 5:00 a.m.
• For 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.
• Full on-ramp closure from Woodbridge Road to southbound SR-99 for tree work on Thursday, January 29, from 8:00 a.m. until 2:00 p.m.