Abstract
This paper proposed and improved an hourly OD flow estimation model from observed traffic flows based on time coefficients of daily OD flow by using the least squares estimator under a given daily OD flow through the application of time-of-day user equilibrium traffic assignments.
This model was applied to estimate the time coefficients of daily OD pairs within or outside the Chukyo metropolitan region in Japan separately. From the result of its application outside the region, it was demonstrated that the model could improve the accuracy of time-of-day traffic flow estimation, especially for large vehicles. Since the region was divided into six zones in the application within the region, the number of variables of the time coefficients in each model was set to two to twenty-five for each zone and direction. After trials of their applications of many patterns of the variables, the sixteen variables model within the region had best accuracy totally.
