What should a crew do when communicating with a flagger during a failure of automatic warning devices?

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The correct answer is that the crew should proceed at 15 MPH without stopping until the crossing is occupied. This protocol reflects the safety measures implemented during situations where automatic warning devices, such as lights and gates, are not functioning properly.

When approaching a crossing under such conditions, it's essential for the crew to maintain caution while also ensuring the safe passage of the train. By proceeding at a reduced speed, the crew can react quickly to any potential hazards they might encounter at the crossing, including the presence of vehicles or pedestrians. This balance between safety and efficiency is critical in ensuring that trains can continue to operate even when automatic systems fail.

Other approaches, such as proceeding at high speed or waiting for a flagger's full warning, may introduce unnecessary risks or delays. Moreover, contacting the dispatcher may not be feasible or warranted in every situation, particularly when immediate action is required to ensure safety at the crossings where automatic warnings are inoperable. Thus, the guideline to proceed at a cautious speed while maintaining awareness allows crews to navigate such incidents effectively.

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