What should be done if a train needs to set out a defective car en route?

When a train needs to set out a defective car en route, it is crucial to set the car out in a location that is accessible to mechanical service employees. This allows for timely inspection and repair of the defective car, minimizing safety risks and potential delays for other trains. The location should meet specific safety standards to ensure that neither the defective car nor the train's movements compromise the safety of operations on the railroad.

Leaving the car on the main track is not advisable as it can obstruct other trains, pose safety hazards, and lead to operational disruptions. Reporting the defective car only at the final destination delays the necessary actions needed to address the problem. Immediate removal of the car from the train without careful consideration of the safest and most practical location for setting it out could also create issues for ongoing train operations and safety. Therefore, setting out the car in an accessible location for mechanical services is the most appropriate and effective action.