A practical method for estimating the headway distribution based on the observed data of the number of flowing vehicles : Gamma distribution model

概要

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A practical method for estimating the headway distribution based on the experimentally observed data of the number of vehicles passing in a certain time interval is theoretically considered in the general case of gamma-type headway distribution model. Concretely, an explicit expression of a generalized probability function for the number of vehicles is newly derived in the expansion form. The probability expression proposed in this study includes as special case the weighted sums of Poisson due to F. A. Haight. The unknown parameters contained in the headway distribution function are estimated by using the method of maximum likelihood. The validity of the theory is exerimentally confirmed by use of a digital simulation technique.
社団法人日本音響学会の論文