Traffic Advisory San Joaquin County 12/19/25

State Route 4 - Ramp Closure
Daytime Ramp Closure 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:

• Full off-ramp closure from westbound SR-4/Crosstown Freeway at Wilson Way for sign work on Sunday, December 21, 2025, from 7:30 a.m. until 12:30 p.m.
• Closure of the #3 (right) lane and shoulder of westbound SR-4/Crosstown Freeway from E Street to Airport Way for sign work on Sunday, December 21, 2025, from 7:30 a.m. until 12:30 p.m.

Interstate 5 - Lane & Ramp 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, December 21, through Wednesday, December 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 Sunday, December 21, through Wednesday, December 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 - Over-Crossing Closure
Long Term Over-Crossing Closure In Stockton

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:

• Long-term full closure of the Calaveras River/Frontage Road Over-crossing of SR-99 due to bridge repair work. Estimated completion date is late December 2025. Please seek alternate route.

Interstate 580 - Ramp Closures
Overnight Ramp Closures At Patterson Pass Near Tracy

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, December 21, through Wednesday, December 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, December 21, through Wednesday, December 24, 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. For the latest highway conditions, visit quickmap.dot.ca.gov