What happens if a train is operating against the current of traffic?

When a train is operating against the current of traffic, it is essential for safety and operational efficiency that the Dispatcher has the ability to authorize the train to operate with the current of traffic. This is critical because trains running against the established flow can lead to increased risks of collisions or other accidents. By allowing the train to proceed in accordance with the current of traffic, it helps to maintain a regulated and safe movement on the tracks.

The option indicating that the Dispatcher can authorize operation with the current of traffic emphasizes the importance of communication and control by the Dispatcher to ensure safety protocols are followed. It allows for necessary adjustments to be made to the train's routing, helping to prevent conflicts with other trains.

Other options suggest immobilization or cancellation of orders, which would not effectively address the operational needs. The option that suggests reverting to manual control does not recognize the necessity of adapting to the overall traffic scenario and coordination among the operations. Thus, authorizing movement with the current of traffic is the most effective and safe approach in this context.