What color will the target show on main track switches, if equipped, when the switch is lined in other than normal position?

The target on main track switches serves as an important visual indicator for train crews regarding the status of the switch. When the switch is lined in a position other than the normal position, it must show a color that clearly communicates that the switch is not set for the main track. This is vital for safety, as it alerts train operators to proceed with caution or to be prepared to stop.

In this case, the target will display red when the switch is not lined for the main track. Red universally indicates a stop or danger situation, signaling to train crews that the track ahead is not clear or safe for passage. This practice aligns with standard railroad signaling protocols, where red is a consistent indication of a restriction or prohibition, ensuring that operators take appropriate precautions.

Other colors, such as green, yellow, or blue, are typically associated with their respective meanings in different contexts (e.g., normal position, caution, or information), but in this specific instance, red is the critical color used to denote that a switch is not in its safe, intended position for the main line. This clarity in signaling helps maintain safety and efficiency in rail operations.