A system is provided for tracking the wheel bearing temperatures of a train
and selecting those that are statistically determined to be abnormally
high, while eliminating from consideration, or otherwise categorizing
those high temperature readings which are the result of other anomalous
and non-anomalous conditions. The system determines the overall
distribution of the bearing temperatures for both sides of a train at each
wayside location. The bearing temperatures are ranked for comparison with
the overall train distribution. Outliers are detected and characterized
based on temperature patterns and previous history.