Abstract
This paper considers enhanced formulations to model commercial vehicle empty trips. These formulations relax a limitation of the original trip chain models, i.e., the assumption of a constant probability of a zero order trip chain, p, for the entire range of trip types. The formulations considered in the paper assumed that p follows a logistic function of the opposing commodity flow, and trip distance. The consideration of a variable p significantly improves the relative performance of the models. The relative error for the models with constant p ranged from 4.2% to 19.3% higher than that for the models with a variable p as a function of either commodity flow or distance.
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Acknowledgements
The research reported in this paper was supported by the National Science Foundation’s grant CMS-0324380. This support is both acknowledged and appreciated.
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Holguín-Veras, J., Thorson, E. & Zorrilla, J.C. Commercial Vehicle Empty Trip Models With Variable Zero Order Empty Trip Probabilities. Netw Spat Econ 10, 241–259 (2010). https://doi.org/10.1007/s11067-008-9066-7
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DOI: https://doi.org/10.1007/s11067-008-9066-7