State Route 120 - McKinley Avenue Interchange Project



Project Description

The SR 120 / McKinley Avenue Interchange Project is located along SR 120 between Yosemite Ave and Airport Way (PM 0.9/3.3) within the jurisdictional limits of both the City of Manteca and San Joaquin County. The approved project alternative is a partial cloverleaf (Type L-9) interchange that includes on- and off-ramps, two new ramp bridges, auxiliary lanes on SR 120, ramp metering and roadway improvements on McKinley Avenue, including Class II bike lanes. In the project design phase, the traffic operations were evaluated to confirm the project’s on-ramps can be constructed in phases with the interior loop on-ramps constructed later.

location map


Project Benefits


  • Improve Traffic Circulation and Accommodate Forecasted Traffic Demand: The State Route (SR) 120 / McKinley Avenue Interchange will provide access to, and exit from, SR 120. The interchange will help relieve congestion on local roads in the area and accommodate forecasted traffic increases as the Family Entertainment Zone and residential areas continue to develop.
  • Accommodate Planned Growth: The SR 120 / McKinley Avenue Interchange will help accommodate the planned growth that the City of Manteca, San Joaquin County, and the San Joaquin County Council of Governments have envisioned in their planning documents. Residential developments have already been permitted on the north and south sides of SR 120.
  • Reduce Congestion on Local Roads: The SR 120 / McKinley Avenue Interchange will connect regional arterials with SR 120 and provide an alternate route to and from the highway for local traffic.
  • Reduce Congestion on State Route 120: The SR 120 / McKinley Avenue Interchange will incorporate access ramp metering which will reduce traffic congestion and enhance safety on SR 120.


SR 120 serves traffic within the Manteca area an interregional traffic between the Central Valley and the Bay Area. The project will help to reduce congestion; improve traffic circulation; and enhance safety for motorists, bicyclists, and pedestrians.


Estimated Construction Cost

The Construction Capital Cost for Phase 1 (without interior loop on-ramps) is $30.8 Million.


Funding Sources

  • Federal Funds
  • Local Regional Transportation Impact Fees
  • Local Redevelopment Agency / Successor Agency Funds
  • Local Development Fees
  • State Transportation Improvement Plan Funds
  • San Joaquin County Measure K Funds


Current Schedule

 Process Date
Project Approval & Environmental Document (M200) November 2014
Right of Way Certification (M410) December 2021
Ready to List (M460) December 2021
Approved Construction Contract (M500) August 2022
Project Completion (M600) Spring 2024



City of Manteca


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.