What colors typically indicate stop, caution, and proceed in Amtrak signal aspects?

What colors typically indicate stop, caution, and proceed in Amtrak signal aspects?

• A. Blue for stop, Yellow for caution, Green for proceed
• B. Red for stop, Yellow for caution/approach, Green for proceed
• C. Red for stop, Green for proceed, Yellow for caution
• D. Yellow for stop, Green for proceed, Red for caution

Answer: (C)

The key idea is how signal colors convey what you should do. Red means stop—you must not pass a red signal. Green means proceed—you can continue, within the allowed speed. Yellow is a caution warning, telling you to slow down and be prepared to stop at the next signal or to expect a restriction ahead. In Amtrak signal practice, the common mapping is Red for stop, Yellow for caution, and Green for proceed. So the option that uses Red for stop, Green for proceed, and Yellow for caution matches this standard. Remember that Yellow can also appear as a caution or approach indication depending on the exact signal configuration, but the essential order is stop on red, proceed on green, with yellow signaling caution.

The key idea is how signal colors convey what you should do. Red means stop—you must not pass a red signal. Green means proceed—you can continue, within the allowed speed. Yellow is a caution warning, telling you to slow down and be prepared to stop at the next signal or to expect a restriction ahead.

In Amtrak signal practice, the common mapping is Red for stop, Yellow for caution, and Green for proceed. So the option that uses Red for stop, Green for proceed, and Yellow for caution matches this standard. Remember that Yellow can also appear as a caution or approach indication depending on the exact signal configuration, but the essential order is stop on red, proceed on green, with yellow signaling caution.