How must a train proceed after receiving a Form D Line 12 notification of an activation failure of an automatic highway crossing warning device, but witnessing the devices functioning?

In cases where a train receives a Form D Line 12 notification indicating an activation failure of an automatic highway crossing warning device, the essential course of action is to ensure the safety of both the train and any potential highway traffic. The notification means that the crossing may not be functioning as intended, raising the risk of a collision with vehicles that may not be warned of an oncoming train.

While witnessing the devices functioning might give a false sense of security, it does not negate the safety protocols established in the operating rules. Therefore, stopping the train and providing on-ground protection at the crossing ensures that any vehicles approaching the crossing can be warned of the train's presence. This allows for a thorough check of the crossing and confirms safe passage before proceeding.

This procedure prioritizes safety over speed, as the activation failure poses serious risks regardless of temporary functioning indicators. Consequently, it is necessary to implement on-ground protection measures to maintain safety at the intersection. This reflects the commitment to safety first in railroad operations, especially in scenarios with potential hazards.