Which term describes the appearance of a fixed signal from the approaching train's viewpoint?

Which term describes the appearance of a fixed signal from the approaching train's viewpoint?

• A. Signal Indicator
• B. Signal Color
• C. Signal Aspect
• D. Signal Plate

Answer: (C)

The term is signal aspect. It refers to the current visible display on a fixed signal as seen from the approaching train, including the lights and their arrangement that convey the required action. The aspect tells the engineer not just the color, but the complete instruction: stop, proceed with caution, or proceed, along with any associated speed or authority. Other terms point to parts of the signal (like a plate) or to a single component (like color), but they don’t capture the full displayed instruction the train interprets.

The term is signal aspect. It refers to the current visible display on a fixed signal as seen from the approaching train, including the lights and their arrangement that convey the required action. The aspect tells the engineer not just the color, but the complete instruction: stop, proceed with caution, or proceed, along with any associated speed or authority. Other terms point to parts of the signal (like a plate) or to a single component (like color), but they don’t capture the full displayed instruction the train interprets.