What does Block Limit signify?

Block Limit refers specifically to a restriction that is applied to train movements within a particular section of track. It indicates that a train must not pass into or through that designated block unless it has received proper authorization to do so, which ensures safety and control of train movements.

In the context of rail operations, this helps prevent collisions and manage the flow of trains on the network. The concept of authorization is crucial because it means that the train crew must wait for clearance or instructions from a dispatcher or signal system before proceeding. This ensures that the track ahead is clear and that no conflicting movements are occurring.

The other options present scenarios that could jeopardize safety. For example, stopping and waiting for further instructions, while potentially cautious, does not reflect the specific directive and authority aspect implied by Block Limit. Likewise, proceeding with caution regardless of signals or continuing at current speed both disregard the necessary communication and authorization integral to maintaining operational safety in rail systems.