Valley Metro Light Rail FSO Complete Practice Test 2025

A "stop signal" instructs the train to halt immediately for safety reasons. This is a critical safety measure designed to prevent accidents and ensure the safety of passengers and crew. When a train encounters a stop signal, it indicates that there is a potential hazard ahead, such as another train on the track, construction work, or an obstruction.

The need for immediate halting is underscored by the defined protocols within rail operations to maintain a safe working environment. This protocol ensures that trains do not proceed until it is confirmed that the track ahead is clear and safe for travel. It is crucial for train operators to adhere to stop signals to prevent collisions and other safety incidents.

Other response options, while relevant in different contexts of rail operation, do not align with the instructions given by a stop signal. The signal does not suggest that the train should proceed with caution, continue to the next station, or increase speed, as these would all pose safety risks in the context of a stop signal’s intent.