Interstate 5 Matthews Road Intersection Improvements

Project Description

The proposed Mathews Rd Intersection Improvements project is located in French Camp, San Joaquin County, on I-5 at the Mathews Road interchange. The project proposes to install interconnected signals at four intersections, modify sidewalks to meet Americans with Disabilities Act (ADA) standards, and modify turn lanes to accommodate Surface Transportation Assistance Act (STAA) trucks and projected traffic volumes. Modifications will be performed at the following intersections:


  • Two Northbound (NB) and Southbound (SB) ramp intersections at I-5/Mathews Rd
  • Two County intersections at Mathews Rd/Manthey Rd and Mathews Rd/El Dorado St


Project Benefits


The purpose of this project is to mitigate the traffic impacts associated with the development and opening of the Veterans Administration (VA) community-based outpatient clinic and living center in the French Camp area of San Joaquin County by signalizing the following intersections: Mathews Rd/Manthey Rd, Mathews Rd/I-5 SB Off-ramp, Mathews Rd/I-5 NB Off-ramp, and Mathews Rd/El Dorado St.


Traffic Impact Study (TIS), completed by W-Trans on July 12, 2019, shows that the VA project would result in significant impacts at the following three intersections: Mathews Rd/Manthey Rd, Mathews Rd/I-5 SB Off-ramp, and Mathews Rd/I-5 NB Off-ramp. The impacts would significantly increase the queue lengths at the I-5 NB & SB Off-ramps, with queues projected to extend past the off-ramp gore point and onto the freeway mainline. In addition, the improvement of a fourth intersection at Mathews Rd/El Dorado St is necessary, due to its proximity and the need for it to be a part of the coordinated signal system to reduce queueing that would otherwise affect the overall traffic operations.


Funding Source

The project is sponsored by the Department of Veteran Affairs (VA) to address traffic mitigations in response to the new clinic in French Camp.


Project Cost/Programmed

 Programed Project Cost Capital $ Support $
Project Approval & Environmental Document $0 $798,000
Plans, Specifications, & Estimates $0 $1,740,000
Right of Way $908,000 $540,000
Construction $0 $780,000


Projected Cost as of (February 2, 2023) Planned $ Expended $
Project Approval & Environmental Document $798,000 $206,000
Plans, Specifications, & Estimates $1,740,000 $0
Right of Way $1,448,000 $0
Construction $0 $0


Current Schedule

 Process Date
Project Study Report (M010) Spring 2023
Project Approval & Environmental Document (M200) Spring 2023
Right of Way Certification (M410) 12/30/2024
Ready to List (M460) 1/7/2025
Approved Construction Contract (M500) 5/15/2025
Project Completion (M600) 6/26/2026


Project Status

The project is concurrently in the Project Initiation Document (PID) and Project Approval & Environmental Documents (PA&ED) phases to develop a Project Study Report (PSR) – Project Report (PR), which is targeted to complete in March 2023.


Project Contact

Caltrans District 10 - Public Information Office
Phone: (209) 948-7977


Title VI Information

The California Department of Transportation (Caltrans) assures that no person shall, on the basis of race, color, or national origin, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity receiving Federal financial assistance, as required by Title VI of the Civil Rights Act of 1964, as amended, the Civil Rights Restoration Act of 1987, and Federal Executive Order 12898 (Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations).

Caltrans will make every effort to ensure nondiscrimination in all of its programs and activities, whether they are federally funded or not, and that services and benefits are fairly distributed to all people, regardless of race, color, or national origin. In addition, Caltrans will facilitate meaningful participation in the transportation planning process in a nondiscriminatory manner.