Caltrain Electrification and Positive Train Control

Visualization of Caltrain electrification


The Peninsula Corridor Joint Powers Board’s (PCJPB or Caltrain’s) Electrification project will replace Caltrain’s existing diesel service with a fully electrified service from the 4th and King station in San Francisco to the Tamian station in San Jose. This is one of the main components of the Caltrain Modernization program (CalMod). The CalMod provides the commuter rail system with the strategic vision to improve system performance while minimizing equipment and operating costs, and is critical to the long-term financial sustainability of Caltrain. The electrification infrastructure project includes the installation of two substations for traction power, poles and an overhead contact system, signal and grade crossing circuitry changes, and the acquisition of electric rolling stock, known as electric multiple units (EMUs), to replace the majority of the current diesel trains. The project will extend for 52 miles from San Francisco to San Jose. It will result in faster and more frequent service, reduction of air pollutant emissions, and reduction of noise and vibration.

The vehicle replacement portion of this project will take place concurrently. The vehicle replacement project that is part of the CalMod Early Investment Program will procure 96 EMU’s to replace 20 locomotives and 73 passenger cars on a seat-for-seat replacement basis at an estimated cost of $440 million in year-of-expenditures dollars. The remaining locomotives and passenger cars will replaced as the vehicles reach the end of their useful life.

Caltrain has completed the preliminary engineering and the federal environmental phases of the Caltrain Electrification Project. The Environmental Assessment/Environmental Impact Report (EA/EIR) was submitted to the Federal Transit Administration (FTA) in March 2009 and the FTA issued a Finding of No Significant Impact on December 17, 2009. The project was subsequently put on hold due to lack of funding. In 2011, the Caltrain Electrification project received a Ruling of Particular Applicability from the Federal Railroad Administration to allow the use of non-compliant EMU trains on railroads that also serve diesel trains.


In early 2012, the California High–Speed Rail Authority’s (CHSRA) 2012 Business Plan embraced a blended operations approach for the system and, most importantly, identified Caltrain as a recipient of early funding available from the state Prop 1A high-speed rail bond funds. Under this structure, Caltrain and the CHSRA will share the infrastructure from San Francisco to San Jose, staying within the existing right-of-way. Electrification of the peninsula rail corridor is a necessary investment to support the blended Caltrain and high-speed rail system. In the short-term, electrification will bring more commuter service to our region in a quieter and greener way. For the long-term, electrification prepares the corridor to receive the high-speed rail system, which will provide a one-seat ride from downtown San Francisco to Los Angeles.

In 2012, the Authority entered into a memorandum of understanding (MOU) with the CHSRA, the Metropolitan Transportation Commission, the City and County of San Francisco, and five other stakeholders to establish a funding framework for a high-speed rail early investment strategy for a blended system in the Peninsula Corridor. The MOU commits each of the three PCJPB members (San Francisco, San Mateo and Santa Clara counties) to a local contribution of $60 million for the Early Investment Strategy for the Peninsula Corridor, comprised of the Caltrain Electrification and Advance Signal System projects, which has a total cost of $1.456 billion.


Engineers discuss aspects of the CBOSS project in the fieldCaltrain is proceeding with the design and installation of the Advance Signal System, also known as the Communications-Based Overlay Signal System (CBOSS) or Positive Train Control Project. CBOSS is a system that tracks train locations and prevents unsafe train movements through the use of equipment on-board the locomotives and in the field along the alignment. In October 2011, the Caltrain awarded a design-build contract to Parsons Transportation Group for the design and implementation of the $231 million CBOSS Project. Final switchover is anticipated in December 2015. In parallel, Caltrain is conducting the required California environmental review for Electrification, with a target completion date in December 2014. Caltrain has also engaged with URS Corporation to provide Program Management services and has started the procurement process for the design-build Electrification contractor and the vehicle manufacturer. Caltrain expects to commence revenue service in 2019.

The CBOSS PTC project is being delivered under a design/build contract. Full installation and certification will be completed by May 2016, at an estimated cost of $231 million. See Caltrain’s project page.

In addition to providing funding, the Authority is participating in a steering committee, composed of the signatories of the funding MOU, that oversees the program’s activities. The Authority also participates in the Peninsula Corridor Working Group and the Local Policy Management Group.

Find out more on the Caltrain Modernization Program web page. Learn more about high-speed rail at the California High-speed Rail Transportation Authority web site.


Download our Caltrain Electrification Fact Sheet.

Map showing Caltrain route from San Jose to San Francisco