At what speed do the Sanders on a train become operational?

The Sanders on a train are designed to activate and operate effectively when the train is traveling at speeds above 5 km/h. This is due to the need for sufficient airflow and ground interaction to create the necessary braking force. At higher speeds, the sand can be efficiently distributed on the tracks to improve traction, particularly on slippery or icy surfaces.

When the train is moving below this threshold, the effectiveness of the Sanders diminishes significantly because the momentum and speed required to disperse the sand adequately are not achieved. Choosing this operational speed threshold ensures that the Sanders function as intended to enhance traction and improve safety during train operations.