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A methodology for modelling travel distances by Bias estimation
Authors:Dr. Francisco A. Ortega  Juan A. Mesa
Affiliation:(1) Departmento de Matemática Aplicada I., Universidad de Sevilla, Sirilla, Spain;(2) Departamento de Matemática Aplicada II Escuela Superior de Ingenieros, Universidad de Sevilla, Sirilla, Spain;(3) Dpto. Matemática Aplicada I., Escuela Técnica Superior de Arquitectura, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain
Abstract:Round norms τl p, p ∈ (1,2] and block norms have been utilised for modelling actual distances in transportation networks. A geometric setting will permit the establishment of a relationship between bias of the road network distance and trajectory deviations, which will be used to separate the set of origin-destination pairs into two samples and also to analyse each sample using regression, thus obtaining several types of estimators. What will be demonstrated in this paper is that these functions can be combined through either a weighted sum, or by means of the introduction of the expected distance concept applied to the bias, to obain distance predicting functions for the region considered.
Keywords:Distance functions   l p and block norms  expected distances
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