What must a train do if it encounters a broken rail before completing movement across it?

When a train encounters a broken rail, stopping and waiting for maintenance personnel to assess the situation is the safest and most responsible action. This approach is essential for ensuring the safety of both the train crew and any passengers on board. Maintenance personnel can perform a thorough evaluation of the damage to determine if the rails can be safely traversed or if further actions need to be taken.

Taking the time to wait for qualified personnel decreases the risk of an accident or further damage to the rail system, which could potentially lead to derailments or disasters. This protocol underscores the importance of safety and preventative measures in train operations, as immediate actions taken in response to rail damage can have significant implications for overall railway safety.

The other actions listed are not advisable because they do not prioritize safety or proper procedure in the event of rail damage. For example, calling for a supervisor to assess the situation may introduce delays but does not adequately address the immediate safety concerns. Proceeding after a quick inspection or continuing to the next station for repairs could put passengers and crew members at risk without a proper safety assessment.