Caltrain Construction Work

Printer-friendly version

Since April of 2015, Caltrain has been performing work within the railroad right-of-way in Brisbane as part of the Advanced Signal System Project to upgrade the safety, performance, and operating efficiency of the Peninsula’s commuter rail system. 

On February 23, Caltrain will be conducting safety tests on the corridor as part of the final phase of implementing the Advanced Signal System Project.  To test the Advanced Signal System, including the roadway crossings, a test train will run through the corridor between 9:00 p.m. and 7:00 a.m.  Tests are conducted at night to avoid disruption of most of regular train service and properly record the results.  Neighbors may experience standard gate crossing noise and horns during this time and we apologize for any inconvenience this may cause.

The Advanced Signal System, also called Communications Based Overlay Signal System (CBOSS) Positive Train Control (PTC) will equip the corridor with federally-mandated safety technology and increase system capacity to help accommodate future ridership demand. The Project will monitor and, if necessary, control train movement in the event of human error. This will increase safety by:

  • Eliminating the risk of train-to-train collisions
  • Reducing risk of potential derailments by enforcing speed limits
  • Providing additional safety for railroad workers on the tracks
  • Improving grade crossing performance to reduce gate downtime and improve local traffic circulation

The CBOSS PTC system is scheduled to be operational by 2015 and is a key component of the Caltrain Modernization Program, which will electrify the Caltrain Corridor by 2019.  An electrified Caltrain will be cleaner and quieter and will upgrade the system to provide faster and/or more frequent service to more stations and riders.

To implement the CBOSS PTC system, there are several installation phases (boring, conduit, fiber pulling, testing) that will occur within Caltrain's right-of-way, usually at night (8pm to 6am) in order to maintain regular train service.  Testing of the fiber cable and the overall system is scheduled for spring 2015.  Residents may experience some minor installation noise during this time.  For more information, please view the Caltrain's CBOSS PTC Project page or contact Caltrain at (650) 508-6499; e-mail: caltrainptc@samtrans.com .