What is "advanced train control system"

n. A system of railroad equipment designed to ensure safety by monitoring locations of trains and locomotives, providing analysis and reporting, and automation of track warrants and similar orders.

An Advanced Train Control System, usually called ATCS, is a system of railroad equipment (hardware and software), designed to ensure safety by monitoring locations of trains and locomotives, providing analysis and reporting, and automation of track warrants and similar orders.

ATCS specifications are published by the Association of American Railroads (AAR), and are designed to document the stated requirements of railroad operational and technical professionals concerning ATCS hardware and software. These specifications are designed to facilitate compatibility and standardization without limiting the internal design approaches of individual suppliers.