What must occur when a train or engine movement partially runs through a switch?

When a train or engine movement partially runs through a switch, the correct response is that the movement must continue over the switch. This is based on standard operating procedures that dictate how to handle situations involving switches, which are critical components in railroad operations. If a movement has already partially crossed into a switch, it often indicates that there is not a safe or advantageous position to halt the train.

Allowing the movement to continue over the switch can ensure consistent flow of operations, minimize disruptions, and prevent potential incidents that could arise from unexpected halting. It also allows for proper alignment of the track and aids in ensuring that the switch operates as designed.

Communication with the dispatcher and taking additional safety measures when managing switch operations is important, but the immediate action involves safely continuing the movement to maintain control and ensure a safe transition over the switch.