If one train were to run over that track then on the train we would also have Point A1 on the wagon of the train correspondent to above Point A and also one other corresponding Point B1 right above Point B.
The court was told a coupler which had been attached to the broken-down track maintenance wagon broke, allowing it to detach from the train which was pulling it.
The original station wagons were literally that wagon bodies built on a Ford Model T chassis used to transport people and luggage from a train station.