State Route 99 / Service Road / Mitchell Road Interchange

Project Description

The project proposes to construct a full interchange in a diverging diamond configuration at Service Road and a partial interchange with ramps connecting Mitchell Road and SR-99 to the south. The project would also make improvements to local streets within the project limits. Construction of this project will:

  • Increase roadway capacity
  • Improve traffic circulation
  • Accommodate future traffic
  • Enhance traffic safety
  • Enhance a key gateway in the Stanislaus County Region


Project Benefits

Purpose and Need

The purpose of the project is to relieve congestion and improve regional mobility by improving access to and from the State Route 99 (SR-99). The project will focus on improving local traffic circulation and accommodating for planned growth by providing additional capacity on Mitchell and Service Roads, signalizing intersections, and increasing connectivity. SR-99 is a part of the California freeway and expressway system, an Intermodal Corridor of Economic Significance, a designated Strategic Highway Network, and a large truck route. Mitchell Road is designated as a principal arterial and identified as a primary access point to SR-99, and a gateway to the City of Ceres. This project is regionally significant as it improves and increases the capacity to the State Route system.


Funding Source

Redevelopment Agency (RDA) Bond Proceeds, Public Facility Fees, Measure L, and Other Funding Sources (Senate Bill 1 (SB1), Federal, and Grants)


Estimated Funding Breakdown

Estimated Project Costs Planned $
Project Approval & Environmental Document $2,700,000
Plans, Specifications, & Estimates $10, 800,000
Right of Way/Construction Support $10,500,000
Right of Way $10,100,000
Construction $99,400,000
Total Estimated Project Cost $133,500,000


Current Schedule

Project Study Report (M010) November 2017
Project Approval & Environmental Document (M200) December 2018
Right of Way Certification (M410) July 2020
Ready to List (M460) December 2021
Approved Construction Contract (M500) January 2022
Project Completion (M600) To Be Determined


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.