What term describes a highly visible marking device affixed to the rear of a train to indicate that the train is complete?

• A. Marker
• B. Interlocking Signals
• C. Advanced Civil Speed Enforcement System (ACSES)
• D. Foul Time

Answer: (A)

Marker is the term for a highly visible marking device placed on the rear of a train to show the end of the train. This clear end-of-train indication helps following trains and yard crews know where the train finishes, preventing miscommunication and accidents, especially in limited visibility or around switches. The other terms refer to different concepts: interlocking signals control routing at junctions, ACSES is a speed-enforcement system, and foul time relates to block occupancy.