What should a train do when a trackside warning detector indicates a one axle plus or minus difference?

When a trackside warning detector indicates a one axle plus or minus difference, the appropriate action is to proceed at maximum authorized speed. This is because a one axle difference suggests a minor issue that does not necessarily warrant a drastic response. In railroad operations, such indicators are designed to alert dispatchers to potential axle or wheel problems that can affect train safety. However, a one axle plus or minus reading typically implies that the situation is within tolerable limits and does not impede train movement.

Moreover, the maximum authorized speed is determined based on safe operating conditions, and unless further investigation reveals an issue that requires action, the train can continue safely. It's essential for train operators to understand these distinctions in readings, as different alerts require different responses based on the severity of the anomaly detected.