What must be done if a Clearance Card Form A is issued?

When a Clearance Card Form A is issued, it is critical to obtain block authority on Clearance Card Form K. A Clearance Card Form A indicates that a train has been given clearance to occupy a track segment, which can impact the operations of other trains. To ensure safety and operational efficiency, obtaining block authority is necessary, as it confirms that the train is authorized to proceed over the route while providing proper communication regarding the train movements on that track section.

This step ensures that all involved parties, including dispatchers and other train crews, are informed about the current track occupancy status and that they can manage the movement of other trains accordingly.

While other options may appear plausible, they do not fulfill the requirement following the issuance of a Clearance Card Form A. For instance, simply proceeding without a stop or waiting for additional instructions could lead to dangerous scenarios, such as trains colliding or being mismanaged on the track. Likewise, notifying the Train Dispatcher is generally a necessary action in various situations, but in the case of a Clearance Card Form A, securing the block authority is the immediate procedure that must be followed.