State Route 132 West

Project Description

This project proposes to construct a four-lane freeway/expressway on a new alignment in Stanislaus County and in the City of Modesto from State Route (SR) 132 from west of Dakota Avenue (PM 10.4) to east of SR 99 at Needham Street (PM 15.0) (See Attachment A – Location Map). This project, referred to as the SR 132 West, is approximately 4.0 miles in length and would be planned for an ultimate six-lane freeway. This project will increase capacity, provide congestion relief, and enhance safety for SR 132 and will provide a much-needed east-west freeway/expressway just north of downtown Modesto. SR 132 West is a main east-west corridor in Stanislaus County and the central valley. It provides an interregional connection between Tracy and Modesto, serves as a connecting link between major freeway routes Interstate 580 (I-580), I-5, and SR 99, and is a major truck route. SR 132 also serves as a major access route for an increasing number of central valley commuters traveling to work in and around Modesto. A significant number of commuters also use SR 132 to travel from Modesto to work in Livermore Valley and the Bay Area. This Project Initiation Document (PID) was prepared by StanCOG to establish the project scope, schedule, and cost for use in planning the Project Approval and Environmental Document (PA&ED) phase. This report will be used as the bases for the Caltrans Project Charter which outlines the PA&ED scope and delivery plan agreement between Caltrans and StanCOG (See Attachment J – Caltrans Project Charter for PA&ED). The proposed project has the support of Caltrans, Stanislaus Council of Governments (StanCOG), County of Stanislaus, and the City of Modesto. Two build alternatives have been identified for further study in the PA&ED phase with an estimated total cost (including construction, right of way, and support costs) ranging from $140 to $170 million. Project funding is expected to come from a combination of local, state, and federal funds and due to funding constraints, the project construction is expected to be completed in phases. The construction phasing plan will be defined in PA&ED, with the first phase construction cost expected to be in the range of $25 to $50 million. This project is designated by Caltrans as a project development Category 1 project as it requires access control, new right of way, and Freeway Agreements.


Project Benefits


  • Improve regional, and interregional traffic circulation along the State Route 132 east-west corridor by constructing a portion of the planned freeway between I 580 and SR 99
  • Relieve traffic congestion along existing SR132 (Maze Boulevard) and improve the connections between SR 99 and SR 132 West
  • Enhance safety and operation of State Route 132 and the 132/99 interchange within the project limits
  • Improve the truck route circulation along SR 132 within the project limits
  • Alleviate a portion of the traffic potentially contributing to conflicts with the bicycles and pedestrians along existing SR 132 (Maze Boulevard)



SR 132 West is part of the Regional Expressway System and is the main east-west corridor in Stanislaus County. It provides an interregional connection between Interstate 5 near the City of Tracy to the west and State Route 99 in the City of Modesto to the east. Additionally, State Route 132 serves as a major access route for an increasing number of Central Valley commuters traveling to work in and around Modesto and is a major truck route between Interstate 5 and State Route 99. The existing SR 132 (Maze Boulevard) and the SR 132/99 interchange within the proposed project limits experiences a relatively high level of congestion due to the limitations of the existing facilities, as well as an increase in interregional commuter and truck traffic mixed with the local area vehicle, bike, and pedestrian traffic. Additionally, uncontrolled access to schools, churches, businesses, and residences along this roadway add to the slow-moving traffic and increase the potential for conflicts between bikes, pedestrians, and vehicles.


Funding Source

State Transportation Improvement Program (STIP) Regional Improvement Program


Project Cost/Programmed

 Process Capital $ Support $
Project Approval & Environmental Document $0 $0
Plans, Specifications, & Estimates $0 $0
Right of Way $0 $0
Construction $0 $0


Projected Cost as of (December 2022) Planned $ Expended $
Project Approval & Environmental Document $0 $6,255,000
Plans, Specifications, & Estimates $0 $1,275,000
Right of Way Support $0 $693,000
Construction Support $0 $1,235,000


Current Schedule

 Process Date
Project Study Report (M010) Spring 2018
Project Approval & Environmental Document (M200) Spring 2018
Right of Way Certification (M410) Spring 2019
Ready to List (M460) Spring 2019
Approved Construction Contract (M500) Fall 2019
Project Completion (M600) Summer 2023


Project Status

Construction in progress with a new Construction Acceptance date of 6/2023


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.