What does correspondence between crossover switches indicate?

The correct answer highlights that correspondence between crossover switches indicates that both switches must be lined either for a straight move or reversed for a crossover. In rail operations, crossover switches enable trains to move from one track to another. For safe and effective operation, both switches must be aligned in such a way that they provide a clear and unobstructed route. If one switch is lined for a crossover while the other remains aligned for a straight path, it could lead to derailments or other dangerous situations.

This alignment allows trains to either transition smoothly from one track to another or to proceed along the same track without obstruction. Proper coordination and correspondence between these switches are crucial for maintaining safety protocols and ensuring efficient operation on the rail system.