Editing Train stop (section)

===Timed train stops===
With a timed train stop, the trip arm stays raised until the approaching train has {{Clarify|reason=I'm not sure if this is jargon or informal, but plain English should be preferred|date=February 2025|text=shunted}} a [[track circuit]] on the approach for a period of time corresponding to a set speed. If the train approaches at a speed higher than the one that is set, the trip arm remains raised and trips the train to a stop. If the train approaches at a speed equal to or lower than the set speed, the trip arm lowers before the train arrives, and the train is able to proceed without further hindrance.

Some timed train stops require the [[Railroad engineer|driver]] to acknowledge a stimulus before the trip arm is lowered on a yellow signal.

For sections of track with lower speed limits ({{Convert|15-20|km/h|4=0|abbr=on|disp=semicolon}}) a simpler construction is also used. The trip arm rotates freely on a horizontal axis with a counterbalance attached to its lower end. If a train's speed is low, the arm will be rotated by the trip cock with a force insufficient to initiate braking. But if its speed is too high, force will be large due to the counterbalance [[inertia]], causing the brakes to be applied.