Which of the following best represents how to read an automatic signal?

Which of the following best represents how to read an automatic signal?

• A. Distant signal status
• B. Home signal status
• C. Mile Post, Even-East, Odd-West
• D. Signal color alone

Answer: (C)

Reading an automatic signal is not just about what color the signal shows; it’s also about identifying exactly which signal you’re looking at on the line. The most reliable way to do that is by using its location reference: the mile post and the track’s orientation (Even-East, Odd-West). This labeling gives a unique, unambiguous identifier for the signal, which is essential when you’re checking the signal against a timetable, a block chart, or in radio communications. The color of the signal tells you what action to take (stop, proceed with caution, or proceed), but there can be multiple signals with similar colors along a route. By specifying the mile post and the east/west side, you know precisely which signal is in question and can apply the correct aspect to the correct location. Distant or home signal statuses describe what the signal is indicating, rather than how you identify which signal you’re reading. Color alone can be ambiguous without the location reference, so using mile post with even-east or odd-west provides the clearest, most complete way to read an automatic signal.

Reading an automatic signal is not just about what color the signal shows; it’s also about identifying exactly which signal you’re looking at on the line. The most reliable way to do that is by using its location reference: the mile post and the track’s orientation (Even-East, Odd-West). This labeling gives a unique, unambiguous identifier for the signal, which is essential when you’re checking the signal against a timetable, a block chart, or in radio communications. The color of the signal tells you what action to take (stop, proceed with caution, or proceed), but there can be multiple signals with similar colors along a route. By specifying the mile post and the east/west side, you know precisely which signal is in question and can apply the correct aspect to the correct location. Distant or home signal statuses describe what the signal is indicating, rather than how you identify which signal you’re reading. Color alone can be ambiguous without the location reference, so using mile post with even-east or odd-west provides the clearest, most complete way to read an automatic signal.