How must multiple-pack track cars move according to regulations?

Multiple-pack track cars must move as one unit under the direction of the Rail Worker in Charge (RWIC). This is crucial for maintaining safety and coordination on the rail network, as multiple-pack track cars are often part of a larger operation that involves both the efficient movement of equipment and ensuring compliance with safety protocols. By moving as a single unit, all cars are able to follow a unified set of instructions and respond collectively to signals or changes in their environment.

This approach minimizes confusion that could arise from individual cars interpreting signals separately, which could lead to unsafe scenarios. Coordination under the RWIC ensures that all personnel involved are aware of the intentions and actions of the entire group of cars, enhancing overall operational safety.