An automatic train control (ATC) system integrates all the vital and non-vital functions that guarantee the safe operation of trains. It comprises three sub-systems, which include onboard and wayside equipment:
Automatic Train Supervision (ATS)
Automatic Train Operation (ATO)
Automatic Train Protection (ATP)
These sub-systems, together with a full interlocking system, perform the following functions:
Automatic train protection
Automatic train control also includes automatic train operation functions.
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Automatic Train Control: An Overview of Available Systems Download