Enhanced Automatic Train Control


E-ATC is a system that uses an underlying automatic train control (ATC) system, in conjunction with other “enhanced” features or systems to achieve the core required functionalities of PTC. These systems are often integrated with underlying cab signal systems (CSS) and centralized traffic control (CTC) systems, in addition to other signal or train control system enhancements the railroad elects to make, to meet the full requirements of PTC.

A PTC System:

  • Prevents train-train-collisions
  • Prevents derailments caused by excessive speed
  • Prevents unauthorized incursions by trains into work zones where maintenance activities are taking place
  • Prevents movement of a train through a track switch left in the wrong position.

RailComm E-ATC Office Segment Benefits:

  • PTC system directly integrates with dispatch workflow through DOC System Forms. No manual steps or second TSR console required.
  • Simplified Training-Single System
  • Proven Experience with PTC, Integration, Wayside


  • The RailComm DOC system provides the Office Segment of the E-ATC PTC system.
  • The PTC user interface through the DOC system allows the operator to issue common rule set forms to request PTC Temporary Speed Restrictions (TSR) and Mandatory Directives (MD). Example forms that can be used to request TSR’s and MD’s are:
    • GCOR Track and Time
    • Track Block
    • GCOR Track Bulletin Form A
    • GCOR Track Bulletin Form B
    • Temporary Speed Restriction Form
    • Track Out of Service Form
    • Track Out of Service with Foreman Form
    • Equipment on Main Form
    • Crossing Mandatory Directive Form
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