What is the normal position for a main track switch?

The normal position for a main track switch is described as "Lined and Locked." This means that the switch is set in a position that directs the train safely on the main line and is secured in that position to prevent accidental movement. When a switch is lined properly, it indicates that the switch points are aligned with the track that a train will follow, ensuring safe passage. Locking the switch is critical in maintaining safety, as it prevents any unintended changes to the switch’s position, which could result in a derailment or an accident.

In the context of railway operations, ensuring that switches are in the correct position and securely locked is vital for maintaining safe and efficient train movement. Other options, such as being activated or released, do not precisely convey the idea of secure alignment necessary for main track switches. The terms "open" and "free" or "neutral" may describe the switch’s operational state but do not indicate the required safety measures of being aligned with the track and secured firmly in place.