How do train operators typically identify points where coasting is needed?

Train operators identify points where coasting is needed primarily by signs along the route. These signs provide critical information regarding speed limits, upcoming curves, grade changes, or stations, guiding operators on when to reduce speed or begin coasting to manage the train's momentum effectively. Recognizing these signs is essential for maintaining safety and efficiency during operation.

While speedometers may inform operators of their current speed and GPS indicators can offer location data, they do not specifically indicate coasting points. Monitoring the time of day may influence operational decisions but does not directly assist in identifying the need for coasting. Therefore, the signs along the route are essential for ensuring that operators can make informed decisions about when to coast for optimal train performance and safety.