What is the significance of multiple engines being coupled in a train?

The significance of multiple engines being coupled in a train primarily lies in their ability to allow for heavier loads to be transported. When multiple locomotives are coupled together, they can provide greater tractive effort, which is essential for pulling longer and heavier trains, especially when facing gradients or other resistance on the track. This capability enhances the efficiency of freight transportation, enabling the movement of larger quantities of goods over the railway system.

This arrangement is crucial for operations, as it helps maintain service reliability and can significantly improve turnaround times for freight deliveries. Additionally, it ensures compliance with weight restrictions that may be present in different rail segments. The ability to haul heavier loads is a primary operational advantage that has a direct impact on the economics of rail transportation.