What is the term for the area of track a train is authorized to occupy?

The term that refers to the area of track a train is authorized to occupy is known as a track warrant. A track warrant is a form of communication used primarily in railroading to inform train crews about specific segments of track they are permitted to occupy and operate on. It provides crucial information, such as the limits of the authority being granted, ensuring that train movements are safely coordinated and that no two trains are authorized to occupy the same segment of track simultaneously.

This method is vital for maintaining safe operations on the railway, particularly in areas without centralized traffic control. By clearly defining the geographic limits and conditions under which the train can operate, track warrants help prevent collisions and ensure efficient train movements.