When approaching a yellow over lunar signal, what must the driver be prepared for?

When approaching a yellow over lunar signal, the train driver must be prepared to pass at restricted speed. This signal indicates that the track ahead is not clear or that there may be a condition requiring caution, thus the driver should reduce speed and be ready to stop if necessary. Operating at restricted speed allows for greater control and safer navigation through areas where obstacles or potential hazards may be present, aligning with the protocols established in the General Code of Operating Rules.

This cautious approach allows the train to respond effectively to any unexpected situations, such as debris on the tracks or a train ahead that hasn’t cleared the signal. Understanding this aspect of signaling helps ensure the safety of the train crew, passengers, and surrounding railroad operations.