Abstract
Although road traffic accidents have contingency characteristics, but also can use the method of forecasting theory to forecast. In this paper, we adopt the gray GM (1,1) model and cubic exponent smooth model to optimum combination ，Established traffic accident prediction model based on IOWGA(induction ordered geometric weighted average)and tested this combination forecasting model .Test results show that the combination forecasting model is effective, reliable, high prediction accuracy, can used to real forecast.
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