noun
preliminary control of lights
Technical term used in traffic engineering or railway signaling for the preparatory phase of light control before a main signal change.
交差点では、準備管制によって信号の切り替えがスムーズに行われる。
At intersections, preliminary control of lights ensures smooth signal changes.
Compound of 準備 (preparation) and 管制 (control), referring to preparatory control in signaling systems.