What does the train number 9701 indicate?

The train number 9701 indicates a southbound train from Roberts Avenue Yard. Train numbering systems are often used for operational purposes, where the structure of the number can convey information about the train's origin, direction, and destination. In this case, the designation of "9701" typically allows dispatchers, conductors, and passengers to identify the specific route and movement of the train.

Within the SEPTA system, certain number ranges are reserved for specific functions and regions. The initial digits can indicate a yard or station of origin, while the last digits often help specify the direction of travel. Thus, identifying that 9701 is a southbound train from Roberts Avenue Yard fits into this structured approach to train numbering, providing clarity and ensuring efficient operations.

Other choices may refer to different train directions or originating points, which do not correspond to the actual assigned meaning of the train number in this scenario.