If a white light is waved back and forth across the track, what action should the train operator take?

When a white light is waved back and forth across the track, it serves as an important signal for train operators. This specific signaling indicates a potential hazard or an emergency situation that requires immediate attention. Stopping the train is the appropriate action to ensure the safety of both the train crew and any workers or equipment that may be on or near the tracks.

By stopping the train, the operator can assess the situation, communicate with any personnel present, and ensure that it is safe to proceed. This response aligns with safety protocols that prioritize the well-being of all individuals involved, as well as the integrity of the train operation. Moreover, stopping allows the operator to avoid potential accidents that could arise from misinterpreting other signals or proceeding without adequate information about the track conditions ahead.