How do train operators generally know the points at which coasting should be used under normal conditions?

Train operators generally know the points at which coasting should be used under normal conditions through signs along the route. These signs provide critical information about the track conditions, upcoming curves, and changes in speed limits, which inform the operator when to coast to optimize efficiency and maintain safety.

Route signs are strategically placed to ensure that train operators have the necessary guidance for smooth operations, allowing them to anticipate transitions in track geometry or speed requirements. This awareness helps in conserving energy and managing the train's speed effectively without relying solely on onboard systems or communication alone.

While onboard computers may assist in monitoring and providing data, and communication with dispatch can provide updates or changes in schedule, the physical signs placed along the track are the primary source for operators to make real-time decisions about when coasting is appropriate. Following the schedule is important for timely operations, but it does not specifically address the technical aspects of coasting at designated points.