When approaching a flashing red order signal, what indication is provided on the CBTC-TOD?

When approaching a flashing red order signal, the indication provided on the Centralized Traffic Control - Train Order Display (CBTC-TOD) typically signifies that the train must stop and wait for clearance. This is because a flashing red light indicates a restriction or a stop signal, much like a stop sign at an intersection, meaning that the train is required to halt its progress until it receives further instructions.

The flashing red signal is a critical safety mechanism that ensures operators do not proceed until it is safe to do so, preventing potential hazards such as collisions or other safety incidents on the rail network. In practical operation, the CBTC system supports the display of such signals to facilitate adherence to safety protocols and procedures.

In this context, while other options may suggest actions like proceeding with caution or calling for orders, the primary directive of stopping when confronted by a flashing red signal is essential for maintaining safety on the railway. Therefore, the most accurate indication when approaching the flashing red order signal is to stop and wait for clearance, as it directly aligns with standard operating procedures in rail systems, ensuring that operators adhere to safety regulations before moving forward.