What should a train operator do when they encounter modified signals on the track?

When encountering modified signals on the track, a train operator should proceed cautiously and be prepared to stop. Modified signals typically indicate that standard rules may not apply or that a potentially hazardous situation is present. This could mean that there are changes to the normal operation, such as track conditions or the presence of maintenance work, which require heightened awareness and caution.

By approaching cautiously, the train operator allows for safer decision-making and can react appropriately to any unexpected situations that may arise. This approach also provides the opportunity to stop safely if further instructions, signals, or potential hazards are encountered. Proper adherence to modified signals is critical for maintaining safety standards on the railway, ensuring both the safety of the crew and any passengers, as well as the integrity of the train system.