What action should a train take if it cannot stop before accepting an Absolute Clear signal?

When a train encounters an Absolute Clear signal and there is a situation where it cannot stop before reaching that signal, the correct action is to bring the train to a stop as soon as the signal becomes visible. This action is in line with safety protocols and ensures that the train does not proceed into a potentially hazardous situation, particularly if the track beyond the signal may not be clear or if there are conditions that could pose a risk.

The emphasis on stopping as soon as the signal is visible serves to mitigate risks associated with entering a section of track where it may not be safe to proceed. It also allows the train crew to assess the situation before making any further movements, reinforcing the importance of strict adherence to signals for maintaining safety and operational integrity on the rail network.

This approach underscores the principle of caution in train operations, especially when dealing with signals that indicate different track conditions. While other actions such as proceeding with caution or ignoring the signal may seem plausible, they do not provide the necessary safety assurances that stopping immediately would ensure.