What does Track Warrant Control (TWC) permit in train operations?

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Track Warrant Control (TWC) is a method of train control that specifically allows for the authorization of train movements on a designated main track. It is a system used primarily to manage train operations in areas where traditional signal systems may not be feasible or available. Through TWC, train crews receive explicit instructions and authority to occupy specific stretches of track, ensuring that they can operate safely and efficiently while preventing conflicts with other trains.

This is particularly critical in ensuring that trains know exactly where they are permitted to move and helps to maintain the safety and integrity of track usage. TWC provides clarity to train crews, detailing which tracks they may use, the direction of travel, and any limits related to time and space, thereby enhancing operational safety.

The other options do not accurately describe the specifics of TWC. For example, track warrant control does not limit its authorization solely to freight trains, nor is it intended solely for the protection of railway workers or maintenance work. Instead, it encompasses all authorized train movements under its system of operation.

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