Accident forecast system and accident forecast method

摘要

PROBLEM TO BE SOLVED: To improve the accuracy of predicting the likelihood of road traffic accidents.SOLUTION: An accident prediction system in an embodiment comprises: an accident prediction table preparation/processing unit; a data acquisition/processing unit; and an accident prediction processing unit. The accident prediction table preparation/processing unit learns accident occurrence patterns by utilizing past traffic data including accident data, on the basis of a self-organizing map which is a learning algorithm having: an input layer for inputting traffic data as an input vector for a predetermined section of a road; a competitive layer comprising a plurality of units corresponding to units of the input vector; and a weight vector for combining respective units in the input layer and respective units in the competitive layer all together. Then, the accident prediction table preparation/processing unit creates an accident prediction table including: accident occurrence degrees indicating a likelihood of accident occurrence corresponding to each unit in the competitive layer; and adjustment factors each for adjusting the accident occurrence degree according to each degree of divergence between an input vector at the time of accident prediction and a weight vector of a winner unit in the competitive layer.SELECTED DRAWING: Figure 1