Before a train leaves its initial station under rule conditions, what must be ascertained?

Ascertaining that all superior trains due have arrived or left is crucial before a train departs from its initial station. This ensures the safety and efficient operation of train services since it helps prevent potential conflicts on the shared tracks. By confirming the status of superior trains, any delays or hold-ups can be identified and mitigated, reducing the chances of accidents or delays due to simultaneous operations on the same corridor. This step is vital in maintaining the overall integrity of the train schedule and ensuring that proper protocols are followed for safe travel.

While the presence of all crew members, weather conditions, and sufficient fuel and resources are important considerations for the smooth running of a train service, they do not directly address the critical issue of track occupancy and potential conflicts with other trains, which is paramount for operational safety and efficiency.