Can multiple trains operate in overlapping limits within TWC territory?

In TWC (Time-Table and Train Order) territory, the operation of multiple trains in overlapping limits is indeed permissible, provided that specific protocols are followed. When multiple trains operate in these overlapping areas, they must adhere to the requirement of moving at restricted speed. This operational guideline is crucial because it ensures the safety of all trains in proximity, allowing crew members adequate time to react to potential obstacles or situations that may arise in the overlapping section. Operating at restricted speed means the train must be able to stop within half of the distance that the engineer can see, thus minimizing the risk of collision or other incidents.

The other options do not align with the established regulations governing train operations in TWC territory. For example, allowing only one train to be authorized or operating without any speed restrictions would compromise safety standards, making those scenarios impractical and unsafe.