Must you lock the main track switch while your train is making a facing point movement over the switch?

• A. Yes.
• B. No.
• C. Only if the switch is in an opposite route.
• D. Only when instructed by dispatch.

Answer: (A)

Facing point movements carry the risk of the switch moving under the train as it crosses the points where the routes diverge. Locking the main track switch before and during the crossing keeps the switch in the intended position, preventing any unintended change of route that could cause a derailment or misalignment. This safety step is required regardless of the specific route or dispatcher instructions, so the switch must be locked for every facing point movement.