What could happen if a train operator does not maintain communication with rail control when conditions change?

Maintaining communication with rail control is essential for ensuring safety and operational efficiency in rail transportation. If a train operator does not keep in contact with rail control during changing conditions, the situation can lead to an increased risk of accidents. This is because rail control provides critical updates about track conditions, potential hazards, and other trains on the route. When an operator is unaware of these changes due to lack of communication, they may inadvertently put themselves and others in danger, as they will not be able to make informed decisions based on real-time information. Effective communication helps in coordinating movements and addressing any issues that arise, thus significantly lowering the likelihood of incidents.

The other options, while they may be relevant concerns, do not directly tie to the core issue of safety that arises from the lack of communication during changing conditions.