Which method allows movement on tracks that are governed by interlocking signals and instructions issued by the RTC?

The method that allows movement on tracks governed by interlocking signals and instructions from the Railroad Traffic Controller (RTC) is known as Centralized Traffic Control (CTC). This system is designed to manage train movements across a wide area from a central location, utilizing signals and switches that can be controlled remotely.

Under CTC, signals indicate whether it is safe for a train to proceed, stop, or take alternate routes, allowing for efficient and coordinated train operations. The RTC monitors these signal aspects and issues instructions based on real-time conditions, ensuring safety and minimizing conflicts between trains.

Other methods, such as controlled or non-controlled track, do not provide the same level of centralized management or signal coordination. Yard tracks typically refer to areas designated for assembling and disassembling trains and do not involve the same systems as CTC. The designed system of CTC is critical for the safe operation of trains in complex rail networks where multiple trains may operate simultaneously.