San Joaquin County Changeable Message Signs Project

Project Description

The project proposes the following Intelligent Transportation System (ITS) elements in San Joaquin County at various locations on State Route (SR) 4 (PM T14.6 to 25.99), Interstate 5 (I-5) (PM R21.44 to 27.9), and SR 99 (PM 15.8 to 18.5):


  • Install four permanent Changeable Message Signs (CMSs) with Maintenance Vehicle Pullouts (MVP), plus two additional MVPs (total 6)
  • Install six Closed Circuit Television (CCTV) Cameras
  • Install Roadside Weather Information System (RWIS)
  • Install Vehicle Classification Stations (VCS)
  • Replace Microwave Vehicle Detection (MVD) with Loop Detector systems, Single Mode Fiber Optic (SMFO) cables and Communication Conduits (CC)


The CMSs, CCTV cameras, RWIS and VCSs would be connected to the Caltrans Stockton Transportation Management Center (TMC).  The TMC will monitor the State highway system and provide the current roadway and weather conditions, highway closures or delays due to adverse weather, highway construction, maintenance operations or accidents to the traveling public.


Project Benefits


The purpose of this project is to expand and integrate the existing ITS infrastructure and to establish a communication network that is secure, low-maintenance, Caltrans owned, cost effective and capable of high bandwidth to transmit data between Stockton TMC servers and field elements.  This integrated system would provide the traveling public with real-time roadway, traffic, and weather information, as well as alternative routes when applicable.  This project would complete the fiber optic network loop for a state-of-the-art, independent fiber optic communication network in San Joaquin County.


The need is to provide a fully integrated communication network to address inadequate ITS within San Joaquin County.  This would provide a solid foundation for future expansion of the communication network to other counties and eventually to other Districts and jurisdictions for a truly integrated, transportation-related, and communication network.


Funding Source

Transportation Management (TMC’s & Field Equipment)


Project Cost/Programmed

 Programed Project Cost Capital $ Support $
Project Approval & Environmental Document $0 $820,000
Plans, Specifications, & Estimates $0 $3,005,000
Right of Way $335,000 $380,000
Construction $11,110,000 $1,805,000


Projected Cost as of (June 8, 2023) Planned $ Expended $
Project Approval & Environmental Document $820,000 $811,000
Plans, Specifications, & Estimates $3,005,000 $3,005,000
Right of Way Support $380,000 $348,000
Construction Support $1,805,000 $0


Current Schedule

 Process Date
Project Study Report (M010) Spring 2016
Project Approval & Environmental Document (M200) Summer 2018
Right of Way Certification (M410) Spring 2022
Ready to List (M460) Spring 2022
Approved Construction Contract (M500) Spring 2023
Project Completion (M600) Fall 2023


Project Status

Construction begins July 1, 2023 with an expected completion in the Fall of 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.