During what circumstance should a train operator proceed slowly past the insulated joint after stopping?

A train operator should proceed slowly past the insulated joint after stopping when the automatic stop arm has cleared. The insulated joint serves a crucial role in the electrical circuit of the track and is a point where the electrical continuity may change. It is essential for train operators to adhere to safety protocols, especially after a stop, because this ensures that the train is moving safely across a potentially sensitive electrical point on the track.

When the automatic stop arm has cleared, it signals that the track ahead is clear for movement, allowing the operator to resume travel while being mindful of any changes in track conditions that might occur due to the insulated joint. Proceeding slowly provides additional safety, giving the operator time to react to any unforeseen circumstances while ensuring the integrity of the electrical systems involved.

On the other hand, signals indicating caution, changing crew, or approaching a station do not specifically dictate a requirement to proceed slowly past an insulated joint after a stop, as these contexts may not directly relate to the safety measures required for navigating over electrical components or joints.