What is a requirement for movements operating at Restricted Speed?

The requirement for movements operating at Restricted Speed is that the movement must permit stopping within one quarter the range of vision. This regulation is critical for ensuring safety in scenarios where visibility is limited or where a potential obstruction may be present on the track. By requiring that a train can stop within this distance, it minimizes the risk of accidents and allows the crew to respond effectively to any unforeseen circumstances, such as an obstruction or track defect.

While other options touch on important aspects of train operations, they do not specifically address the primary safety measure that defines Restricted Speed. Maintaining awareness of track conditions and signaling are certainly vital responsibilities, but the key requirement is the ability to stop within a distance that allows for safe operations given the reduced visibility inherent in Restricted Speed scenarios.