noun
automatic train control; ATC
Railway signaling system that automatically controls train speed and braking to maintain safe distances and prevent collisions.
新幹線には自動列車制御装置が導入されている。
The Shinkansen is equipped with an automatic train control system.
ATS (Automatic Train Stop) is a simpler system that only stops the train when a signal is passed at danger, whereas ATC continuously controls speed.
Compound of 自動 (automatic), 列車 (train), 制御 (control), and 装置 (device). A direct technical term without known historical derivation.