ATO CBTC corresponds to which device?

• A. Automatic Train Operation
• B. Alarm Signalling Protocol System
• C. Approach Lock Repeater Stick
• D. Automatic Train Protection Manual

Answer: (C)

In CBTC, ATO stands for Automatic Train Operation, which is the part of the system that actually drives the train—controlling acceleration, cruising speed, and braking to run trains automatically within safety limits. So, the device or function that ATO corresponds to is the Automatic Train Operation itself—the onboard or control-system component that performs automatic driving. The other options don’t fit CBTC terminology: Alarm Signalling Protocol System isn’t a recognized CBTC device, Approach Lock Repeater Stick isn’t a CBTC component, and Automatic Train Protection Manual would imply a non-automatic mode, whereas ATP is the automatic safety function in CBTC.