At what speed should cars be coupled together when approaching from a few feet apart?

When coupling cars that are approaching from a few feet apart, the correct speed is 1.5 feet per second. This speed is optimal as it allows for a gentle and controlled connection between the cars, minimizing the risk of sudden jolts that could damage the equipment or injure personnel. Coupling at this speed helps ensure that the couplers connect properly, which is crucial for the safety and integrity of the train.

The choice of speed is informed by safety protocols and the mechanics of the couplers used in train composition. It's essential that the coupling process is smooth to maintain the operational efficiency of the train and prevent potential derailment or misalignment of the cars during the joining process.