Positive train control in transition

摘要

The rail industry's search for an interoperable communications-based train-control system is a quarter-century old. Yet, the hunt for an affordable system that helps safely control a train from one railroad's network to another hasn't registered much success since the early 1980s, when railroads tried to employ an Advanced Train Control System.rnBut positive-train control (PTC) system suppliers GE - Transportation, Safetran Systems Corp. and Union Switch & Signal Inc. (US&S) believe their jointly developed Communications-Based Signaling (CBS) could bring the questrnto an end. An interoperable radio- and signaling-based vital train-control system, CBS is designed to provide continuous overspeed protection, govern the safe movement of trains through a territory and secure communications between different substations.