What does a signal indicating "proceed" allow the train to do?

A signal indicating "proceed" is a directive that explicitly allows the train to continue its journey without any limitations on speed, unless otherwise specified by additional signals or conditions. This means that the train operator can maintain normal operational speeds as per the established timetable and safety protocols.

Understanding the context of train signaling is crucial; "proceed" typically means that all conditions are clear for the train to advance safely, suggesting that any potential hazards or restrictions have either been cleared or do not exist in that section of track. Therefore, with a "proceed" signal, the train operator is expected to operate the train normally, given that they continue to monitor the surroundings for any unforeseen circumstances that may arise.

The other options, such as stopping for further instructions or reducing speed significantly, contradict the purpose of a "proceed" signal, as it is designed to indicate safety and clearance for continued movement. Signals for caution relate to conditions requiring vigilance or slower speeds but do not convey the same permissions as a "proceed" signal.