ATS CBTC is the code for which function?

• A. Automatic Train Protection Manual
• B. Automatic Train Operation
• C. Automatic Train Supervision
• D. Approach Lock Repeater Stick

Answer: (A)

In CBTC systems, functions are grouped into Automatic Train Operation (ATO), Automatic Train Protection (ATP), and Automatic Train Supervision (ATS). The term ATS refers to the supervisory layer that oversees train movements across a network—handling aspects like routing, scheduling, tracking train positions, and coordinating with the signaling center. It provides operational oversight rather than directly driving trains or enforcing safety brakes. Therefore, the code ATS CBTC corresponds to Automatic Train Supervision. The other options don’t fit because ATP is the protection function that enforces safety, ATO is the automatic driving function, and the term Approach Lock Repeater Stick isn’t a standard CBTC function.