What action should be taken if the train has not been granted permission to enter ABS territory?

In scenarios where a train has not been granted permission to enter Automatic Block Signal (ABS) territory, the appropriate course of action is to wait for clearance from the Dispatcher. This ensures that the train does not enter an area where it could potentially compromise safety protocols or interfere with other train movements that are currently authorized. The Dispatcher is responsible for managing train movements and ensuring that all relevant signals and permissions are in place before a train can safely proceed. Waiting for clearance mitigates the risk of accidents or mishaps that could arise from unauthorized entry into ABS territory.

Other options lead to potential safety violations or misunderstandings about train movements. For instance, authorizing movement through verbal confirmation could bypass established safety procedures. Issuing a warning signal, while it might alert the crew, does not provide the necessary authority for the train to proceed. Finally, proceeding with caution until stopped would also be unsafe, as it assumes the train may continue without proper permission, further endangering the operation and crew. Each of these alternatives lacks the procedural integrity and safety assurance that comes with waiting for Dispatcher clearance.