State Route 120 - McKinley Avenue Interchange Project

Project Facts


The SR120 / McKinley Avenue Interchange Project is located along SR120 between Yosemite Ave and Airport Avenue (PM 2.2/3.2) 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 a Class 1 bike path. In the project design phase the traffic operations are being evaluated to confirm the project’s on-ramps can be constructed in phases with the interior loop on-ramps constructed at a later date.

Project Benefits

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.

Funding Breakdown

The $46 million project was included in the Federal SAFETEA-LU bill as High Priority Program Project No. 1775, and received a federal earmark to help fund the planning and design. Right-of-way acquisition and construction will be funded by a combination of local, regional, and state funds.

Estimated Construction Cost: $25 Million

Funding Sources:

  • Federal Funds
  • Local Regional Transportation Impact Fees
  • Local Redevelopment Agency / Successor Agency Funds
  • Local Development Fees
  • State Transportation Improvement Plan Funds

PA&ED: Completed in Nov 2014
Design: Jun 2016 – Jun 2019 
Right of Way: Jul 2016 – Apr 2019 
Construction: Aug 2019 – Aug 2020


City of Manteca

Project Contact

District 10 Public Information Office
1976 Dr. Martin Luther King Jr. Boulevard 
Stockton, CA 95205
Phone: (209) 948-7977 


Fact Sheet

Notice of Public Hearing (PDF)

Public Hearing Presentation (PDF)

Environmental Documentation (Final) (PDF)