Norfolk Southern Practice Test

A closed position on a switch is indicated by the switch being lined and locked. This means that the switch is set in the correct position for trains to pass safely and is secured to prevent any accidental movement. When a switch is properly locked, it ensures that the rail lines are aligned and reinforces safety protocols, reducing the risk of derailments or accidents.

In contrast, if a switch is aligned but unlocked, it cannot be considered in a closed position because it is not securely set. A switch in mid-position does not provide a definitive track choice for a train, making it unsafe. Lastly, when a switch is fully open, it allows tracks to diverge, which indicates that it is not closed and trains may be directed to a different path. Therefore, a lined and locked switch properly indicates a secure and closed position.