Highlights Newell's car-following model was modified incorporating stochastic parameters. Driving behavior heterogeneity was investigated based on trajectories in Beijing. Modified model generated improved realistic trajectories for emissions estimation.
Abstract Existing studies have indicated that the vehicle trajectories derived from Newell's car-following model (NCM) fail to capture driving behavior heterogeneity, resulting in considerable emission estimation errors. This study investigated the situation-dependent heterogeneity of car-following behavior, based on field vehicle trajectories in Beijing, and proposed a multidimensional stochastic Newell car-following model (MSNCM) incorporating three stochastic parameters: random response time, speed-dependent critical jam spacing, and speed difference- and spacing-dependent acceleration. The comparison between the field data and numerical simulations of the NCM and MSNCM shown that the MSNCM performed well in generating realistic vehicle trajectories for emission estimation. The relative errors of the emission factors derived from the field and the MSNCM simulated trajectories were 0.26%, 0.91%, 1.37%, and 0.25% for CO2, CO, HC, and NOx, respectively, which represented reductions of approximately 15%-46% compared with the traditional NCM.
Modification of Newell’s car-following model incorporating multidimensional stochastic parameters for emission estimation
2020-01-01
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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