If a color light signal is imperfectly displayed, what is the governing rule?

When a color light signal is imperfectly displayed, the governing rule indicates that a restricting signal indication applies. This means that train operators must interpret an imperfectly displayed signal as a signal that restricts movement. The purpose of this rule is to ensure safety by requiring the train to proceed with caution, given that an unclear or erroneous signal might indicate that there is a potential hazard ahead or that normal operations cannot continue safely.

This approach prioritizes the safety of both the train and its passengers, as it ensures that train operators err on the side of caution when a signal is in question. By interpreting it as a restricting indication, crews are prompted to reduce speed and prepare to stop if necessary, allowing for a proper assessment of any underlying issues that may have caused the signal's imperfect display. In real-world scenarios, this rule is crucial for maintaining safe railway operations and preventing accidents that could arise from misinterpreted signals.