When lining a crossover switch for crossover movement, what procedure must be followed?

For crossover movements, it is essential that both switches of the crossover are properly lined. This ensures that the train can safely transition from one track to another without risk of derailing or encountering misaligned tracks. Proper alignment of both switches is crucial for maintaining the integrity of the route and ensuring the safety of train operations.

If only one switch were lined, it could lead to a dangerous situation where the train is directed onto an incorrect track or possibly encounters an open switch, resulting in significant safety hazards. Therefore, the procedure mandates that both switches must be adjusted to the correct position before the train approaches the crossover. This double-checking of switch alignment is a critical safety measure in train dispatching to prevent accidents and maintain fluid operations on the rail network.