Automatic Train Control (ATC) is the term for a general class of train protection systems for railways that involves some sort of speed control mechanism in response to external inputs. ATC systems tend to integrate various cab signalling technologies and the use more granular deceleration patterns in lieu of the rigid stops encountered with the older Automatic Train Stop technology. ATC can also be used with Automatic train operation (ATO) and is usually considered to be the safety critical part of the system.
Over time there have been many different safety systems labeled as Automatic Train Control. The term is especially common in Japan, where ATC is used on all Shinkansen (bullet train) lines and other lines as a replacement for ATS.
Famous quotes containing the words automatic, train and/or control:
“The ruin of the human heart is self-interest, which the American merchant calls self-service. We have become a self- service populace, and all our specious comforts—the automatic elevator, the escalator, the cafeteria—are depriving us of volition and moral and physical energy.”
—Edward Dahlberg (1900–1977)
“The trouble about soldiers in Mr. Siegfried Sassoon’s poetry ... is that they are the kind of people who in a railroad train have to travel with their backs to the engine. Peace can have but few corners softly padded enough for such sensitives.”
—Rebecca West (1892–1983)
“Being a parent is such serious business that we dare not take it too seriously. Children are inherently funny. So are parents. We all are at our funniest when we are desperately struggling to appear to be in control of a new situation.”
—Lawrence Kutner (20th century)