Invensys Rail's subsidiary PHW has secured a sub-contract in Philadelphia, US, to install a microprocessor-based positive train control (PTC) system on all of Southeastern Pennsylvania Transportation Authority's (SEPTA's) transit rail vehicles.
The SEPTA PTC system to be installed on the transit rail vehicles will be based on the ACSES II system.
In order to replace the existing cab signal system (CSS), PHW's ACSES onboard computer will be combined with its 9-aspect automatic train control equipment.
Track circuits, track-mounted transponders and an onboard 220 MHz radio system will help the PTC system communicate with wayside installations.
Both PTC and cab signal information will be displayed to the train engineer through a new aspect display unit built by PHW.
In February 2012, SEPTA awarded a $98.7m contract to Ansaldo STS USA to develop the PTC system.
The new train-control system will automatically halt trains if engineers do not observe stop signals. Under US federal law, it must be installed on trains by 31 December 2015, although the deadline for the installation of the new systems is expected to be extended by the government because of the cost and time involved.
According to SEPTA officials, the cost would mean cancelling or delaying many other transit projects in the Philadelphia region.
The US Government wants to have PTC systems installed on all rail lines that carry passenger traffic to prevent similar collisions to the one that killed 25 people and injured more than 130 in Los Angeles in 2008.