When must crew members continue moving a train at a speed not exceeding 10 mph?

Crew members must continue moving a train at a speed not exceeding 10 mph once they are two miles beyond a yellow flag and no restrictions are noted. This procedure is designed to ensure safety when approaching areas where track work or other potential hazards exist, as indicated by the yellow flag signal.

A yellow flag is a warning, indicating that caution is needed due to track conditions or maintenance work ahead. By enforcing a speed limit of 10 mph after passing a yellow flag but still within two miles, crew members can maintain control of the train and respond quickly to any unforeseen issues that may arise. When no further restrictions are noted, it confirms that it is safe to proceed, albeit at a reduced speed.

Understanding this context highlights the importance of vigilant adherence to flags and signals, which help ensure safety for both the crew and any maintenance personnel working on the tracks.