How can a train operator request the correct route if the signal indicates the wrong one?

A train operator must follow established protocols to ensure safety and correct navigation. When a signal indicates an incorrect route, the operator can request the correct route by pressing the button corresponding to the desired route. This method directly communicates the operator's needs to the signaling system or control center, which is designed to handle such requests proficiently.

This process is part of the automated systems in place that allow for rapid adjustments and communication in the event that the signals do not align with the route the operator intends to take. It minimizes the risk of human error and ensures that the request is logged and handled promptly.

The other methods mentioned may not effectively address the situation. Signaling with a horn is primarily used for alerts and warnings, while contacting an operator directly could introduce delays that are not ideal in situations requiring immediate action. Moving the train forward slightly might not be safe or effective, particularly if the signal is incorrect—this could lead to potential risks if the route is unfriendly.

Therefore, pressing the button corresponding to the desired route ensures that the operator follows the proper protocol to achieve a safe and efficient resolution to the signal discrepancy.