What is the speed limit when passing through an area indicated by three yellow lanterns suspended alongside the track?

The presence of three yellow lanterns suspended alongside the track signals a specific condition that requires operators to reduce speed. In this case, the correct answer of 10 MPH reflects the requirement to approach that area cautiously and prepared for potential hazards or changes in track conditions. This speed limit is established to prioritize safety, allowing train operators enough time to react to any unforeseen circumstances they might encounter, such as workers on the track, maintenance equipment, or other potential obstacles.

Understanding this rule is crucial because it helps maintain a safe operating environment and allows for smooth operations while ensuring the safety of personnel along the tracks. The other speed limits would either be too slow or too fast for the conditions prescribed by the yellow lantern signals, emphasizing the necessity of adhering to the 10 MPH limit in such circumstances.