When a train operates at restricted speed, how long must this speed requirement be followed?

When a train operates at restricted speed, it must follow this speed requirement until the leading wheels reach a point where it is no longer required. This regulation is critical for maintaining safety, particularly in areas where visibility is impaired or where there is a potential for obstacles on the track, such as work zones or switches. By requiring compliance with restricted speed only until the leading wheels of the train pass a specific point, it allows for a practical and flexible response to changing conditions on the railway.

In essence, this means that as soon as the train safely clears the area where restricted speed was mandated, it can return to normal operations, thus optimizing the flow of rail traffic while still prioritizing safety. Keeping speed restrictions in place just for the necessary sections of the track minimizes delays and improves overall efficiency for train operations.