自じ動どう列れっ車しゃ制せい御ぎょ装そう置ちじどうれっしゃせいぎょそうちMeanings1nounautomatic train control; ATCRailway signaling system that automatically controls train speed and braking to maintain safe distances and prevent collisions.新しん幹かん線せんには自じ動どう列れっ車しゃ制せい御ぎょ装