How should an improperly displayed signal or the absence of a fixed signal be regarded?

The correct approach to an improperly displayed signal or the absence of a fixed signal is to treat it as displaying the most restrictive indication it can give. This method prioritizes safety by assuming that any ambiguity in signal display represents the worst-case scenario for train operations, which is particularly important in preventing accidents or mishaps.

By regarding the signal as displaying the most restrictive indication, train dispatchers ensure that train movements are conducted with extreme caution. This principle of operating under the assumption of a restrictive signal safeguards against the risk of miscommunication or equipment malfunction. It encourages a conservative approach where all personnel involved remain vigilant and alert to potential issues on the track.

In terms of signal safety, this practice reflects the broader protocols in rail operations that prioritize safety above all else, ensuring that any uncertainty doesn't lead to unsafe conditions on the railway. This answer aligns with best practices in train dispatch procedures, emphasizing the vital importance of treating signal ambiguities seriously.