What are interlocking limits defined by?

Interlocking limits are defined by the distance between opposing train signals. This definition is crucial because interlocking systems are designed to manage train movements at junctions and crossings to ensure safety. Specifically, interlocking limits refer to the area within which conflicting movements are controlled to prevent accidents, and this is inherently linked to the placement and function of the signals that control those movements.

By knowing the distance between opposing signals, train crews can understand the extent of the interlocking mechanism and ensure that trains do not receive conflicting indications, thereby maintaining safe operations. The layout of train schedules, the type of rolling stock, and maximum speed permitted on the track, while relevant to railroad operations, do not directly inform the definition of interlocking limits.