What is the primary role of a switch detector light in tower operations?

The primary role of a switch detector light in tower operations is to confirm the signal operation status. This is crucial in ensuring that the signaling system is functioning correctly and that the signals are displayed as intended. By confirming the operation of the signal, tower operators can maintain the integrity of the rail traffic management system, ensuring trains operate safely and efficiently.

The switch detector light provides visual feedback that can alert operators to any issues with the signaling system. This immediate indication helps to ensure that any necessary corrective actions can be taken promptly, thereby enhancing the overall safety and reliability of rail operations.