When a train passes a signal requiring movement at restricted speed, how far must it operate at that speed?

When a train passes a signal indicating that it must move at restricted speed, the operation at that speed is required until the next governing signal or the end of the block system is reached. This requirement is primarily for safety reasons. Restricted speed is a guideline that ensures the train can stop within half of the distance it can see ahead, allowing it to react appropriately to any obstacles or conditions that may pose a risk, such as track work or other trains on the same track.

The governing signal can indicate a change in the speed at which the train can safely operate or provide further instructions for stopping. The end of the block system signifies the limits of the area in which the train dispatcher has control and where the train may operate at higher speeds once it exits those parameters. Thus, adhering to the requirement to travel at restricted speed until one of these points ensures safe operations within the network.

Understanding this concept helps reinforce the importance of following signal indications and the operational protocols that govern train movement in a controlled environment.