Route 120 McKinley Avenue Interchange Project Fact Sheet

Project Purpose

  1. 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.

  2. Accommodate Planned Growth: The SR120 / 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 SR120.

  3. Reduce Congestion on Local Roads: The SR120 / McKinley Avenue Interchange will connect regional arterials with SR120 and provide an alternate route to and from the Highway for local traffic.

  4. Reduce Congestion on State Route 120: The SR120 / McKinley Avenue Interchange will incorporate access ramp metering which will reduce traffic congestion and enhance safety on SR120.

Project Description:

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 onramps can be constructed in phases with the interior loop on-ramps constructed at a later date.

Estimated Construction Cost:

Estimated Construction Cost: $25 Million


  • PA&ED: Completed in Nov 2014
  • Design: Jun 2016 – Jun 2018
  • Right of Way: Jul 2016 – Apr 2018
  • Construction: Jun 2018 – June 2020

Funding Sources:

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

Lead Agency:

City of Manteca