What signals indicate that a switch is aligned for movement?

The answer identifies that green lights or other prescribed signals indicate a switch is aligned for movement. This is crucial for maintaining safety and ensuring efficient operations within rail systems. Green lights typically signal to crew members that it is safe to proceed, confirming that the switch is positioned correctly for the intended route.

Other prescribed signals may also include specific configurations of lights or visual indicators that provide assurance to operators regarding the switch's alignment. Properly understanding these signals helps prevent accidents and ensures that trains can navigate the rail network without encountering misaligned switches, which could lead to derailments or collisions.

In contrast, flashing yellow lights generally indicate caution rather than alignment for movement, static red lights signify a stop condition, and the option stating that no signals are required would compromise safety protocols essential for train and crew operations.