What sign is used at the end of ABS territory to indicate the end of Automatic Block?

What sign is used at the end of ABS territory to indicate the end of Automatic Block?

• A. End Automatic Block Sign
• B. End Automatic Signal Sign
• C. End Block Sign
• D. No End Sign

Answer: (A)

The main idea is that ABS territory is protected by automatic block signals, and there must be a marker at the boundary to tell you you’re leaving that system. The End Automatic Block Sign marks the end of Automatic Block protection, signaling that the automatic block signaling system no longer applies beyond that point. After seeing it, you transition to the rules that govern the next section of track (such as timetable or track authority) rather than ABS signals. End Automatic Block is the best answer because it directly conveys the boundary between ABS territory and non-ABS operations. The other options don’t specify the end of the Automatic Block system, and one is too generic while the last isn’t a standard sign for this purpose.

The main idea is that ABS territory is protected by automatic block signals, and there must be a marker at the boundary to tell you you’re leaving that system. The End Automatic Block Sign marks the end of Automatic Block protection, signaling that the automatic block signaling system no longer applies beyond that point. After seeing it, you transition to the rules that govern the next section of track (such as timetable or track authority) rather than ABS signals.

End Automatic Block is the best answer because it directly conveys the boundary between ABS territory and non-ABS operations. The other options don’t specify the end of the Automatic Block system, and one is too generic while the last isn’t a standard sign for this purpose.