What is the primary function of a track warrant in railroad operations?

The primary function of a track warrant in railroad operations is to authorize a train to occupy designated limits on the main track. A track warrant serves as a formal permission granted to a train crew, allowing them to operate within specific portions of the track under certain conditions. This is crucial for maintaining safety and coordination among multiple trains sharing the same track, as it helps prevent collisions and ensures that each train knows where it can operate safely.

In this context, a track warrant outlines the exact limits for train movement, including where the train is allowed to proceed and any restrictions that might apply. This is particularly important in areas where trains may encounter each other or where track work is being conducted. By clearly defining these limits, the track warrant plays a vital role in the overall safety and efficiency of rail operations.