I-5 Anchor Project to Increase Safety and Improve Travel Conditions Between north Stockton and Sacramento


Highlights Include Improved Roadway Surface, Installation of Traffic Management Systems and New Mobility Elements

 I-5 Improvements Sacramento to Stockton

Stockton – Motorists traveling on Interstate 5 between Stockton and Sacramento will benefit from a smoother roadway and safer driving conditions once a new project to improve the surface of Interstate 5 is complete.

Caltrans is set to begin the I-5 Anchor Pavement Rehabilitation and Improvement Project the week of June 7.

The $123 million effort is made possible by $111 million in federal funding and $12 million from Senate Bill (SB 1), the Road Repair and Accountability Act of 2017.  The project will improve 34 miles of existing pavement and shoulders from Hammer Lane in Stockton to the San Joaquin/Sacramento County line. Work 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.

“Investments from the state and our federal partners allow Caltrans to continue prioritizing projects that improve the safety and long-term reliability of California’s roadways,” Caltrans Director Tony Tavares said. “Residents and commercial drivers who rely on this frequently traveled stretch of I-5 will benefit from a smoother, safer ride as they deliver freight or commute to work, school, or other engagements.”

I-5 Sacramento to Stockton

Nearly 75,000 vehicles travel each day on I-5 between Hammer Lane and Eight Mile Road in north Stockton, and another 66,000 travel between Eight Mile Road and the Sacramento County line.

Caltrans expects to complete the project by September 2026.

The I-5 Anchor project will also make the following improvements and upgrades:

  • Bridge rail replacement at Hammer Lane.
  • Shoulder extension to accommodate maintenance vehicles and perform slope paving.
  • New curb ramps and accessible pedestrian signals for better ADA accessibility.
  • Truck-turning improvements at Peltier Road and Thornton Road on and off-ramps.
  • Install new overhead lighting near all on- and off-ramps.
  • Replace or install Traffic Management System elements (Changeable Message Signs, Closed Circuit TV, fiber optics, and vehicle detector stations).
  • Replace or install overhead sign structures and roadside signs.
  • Replace guardrail as needed.

“This important project will help improve the safe movement of traffic and increase accessibility for all users,” Acting Caltrans District 10 Director Grace B. Magsayo said. “The I-5 corridor is a vital route for commuters, tourists and the movement of commercial and agricultural products traveling through our region and beyond. We would like to thank motorists in advance for their patience during construction and remind everyone to please drive safely.”      

Construction will start on the northbound and southbound I-5 segments between Hammer Lane and Eight Mile Road. Work will then progress from Eight Mile Road to the San Joaquin/Sacramento County line, where it will include concrete slab replacement repairs

Several long-term shifts to traffic lanes and full closures of on- and off-ramps at various locations will occur as work progresses. To view illustrations of the nine different lane shifts required during the project, please visit https://dot.ca.gov/caltrans-near-me/district-10/district-10-current-projects/10-1e300

Future traffic advisories and social media content will provide the traveling public with highway lane shift and ramp closure locations, dates and details. 

Caltrans will use changeable message signs to alert motorists of approaching traffic lane shifts, ramp and lane closures. Roadside signage will also alert motorists of all closures and any required detour routes.

SB 1 provides $5 billion in transportation funding annually shared equally between the state and local agencies. Road projects progress through construction phases more quickly thanks to the availability of SB 1 funds, including projects that are partially funded by SB 1. To view the latest news and information on SB 1 funding and federal infrastructure investments, visit RebuildingCA.ca.gov

For more information on this project, please visit https://dot.ca.gov/caltrans-near-me/district-10/district-10-current-projects/10-1e300

For more information about transportation and other infrastructure projects funded with state and federal investments, visit RebuildingCA.ca.gov and Build.ca.gov.

Motorists are reminded to #KnowBeforeYouGo and check current highway conditions and closure information at www.quickmap.dot.ca.gov before traveling.

For the safety of workers and other motorists, please Be Work Zone Alert.