dorsal/arxiv
View SchemaCriterion for traffic phases in single vehicle data and empirical test of a microscopic three-phase traffic theory
| Authors | Boris S. Kerner, Sergey L. Klenov, Andreas Hiller |
|---|---|
| Categories | |
| ArXiv ID | physics/0507094 |
| URL | https://arxiv.org/abs/physics/0507094 |
| DOI | 10.1088/0305-4470/39/9/002 |
Abstract
A microscopic criterion for distinguishing synchronized flow and wide moving jam phases in single vehicle data measured at a single freeway location is presented. Empirical local congested traffic states in single vehicle data measured on different days are classified into synchronized flow states and states consisting of synchronized flow and wide moving jam(s). Then empirical microscopic characteristics for these different local congested traffic states are studied. Using these characteristics and empirical spatiotemporal macroscopic traffic phenomena, an empirical test of a microscopic three-phase traffic flow theory is performed. Simulations show that the microscopic criterion and macroscopic spatiotemporal objective criteria lead to the same identification of the synchronized flow and wide moving jam phases in congested traffic. It is found that microscopic three-phase traffic models can explain both microscopic and macroscopic empirical congested pattern features. It is obtained that microscopic distributions for vehicle speed difference as well as fundamental diagrams and speed correlation functions can depend on the spatial co-ordinate considerably. It turns out that microscopic optimal velocity (OV) functions and time headway distributions are not necessarily qualitatively different, even if local congested traffic states are qualitatively different. The reason for this is that important spatiotemporal features of congested traffic patterns are it lost in these as well as in many other macroscopic and microscopic traffic characteristics, which are widely used as the empirical basis for a test of traffic flow models, specifically, cellular automata traffic flow models.
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"abstract": "A microscopic criterion for distinguishing synchronized flow and wide moving\njam phases in single vehicle data measured at a single freeway location is\npresented. Empirical local congested traffic states in single vehicle data\nmeasured on different days are classified into synchronized flow states and\nstates consisting of synchronized flow and wide moving jam(s). Then empirical\nmicroscopic characteristics for these different local congested traffic states\nare studied. Using these characteristics and empirical spatiotemporal\nmacroscopic traffic phenomena, an empirical test of a microscopic three-phase\ntraffic flow theory is performed. Simulations show that the microscopic\ncriterion and macroscopic spatiotemporal objective criteria lead to the same\nidentification of the synchronized flow and wide moving jam phases in congested\ntraffic. It is found that microscopic three-phase traffic models can explain\nboth microscopic and macroscopic empirical congested pattern features. It is\nobtained that microscopic distributions for vehicle speed difference as well as\nfundamental diagrams and speed correlation functions can depend on the spatial\nco-ordinate considerably. It turns out that microscopic optimal velocity (OV)\nfunctions and time headway distributions are not necessarily qualitatively\ndifferent, even if local congested traffic states are qualitatively different.\nThe reason for this is that important spatiotemporal features of congested\ntraffic patterns are it lost in these as well as in many other macroscopic and\nmicroscopic traffic characteristics, which are widely used as the empirical\nbasis for a test of traffic flow models, specifically, cellular automata\ntraffic flow models.",
"arxiv_id": "physics/0507094",
"authors": [
"Boris S. Kerner",
"Sergey L. Klenov",
"Andreas Hiller"
],
"categories": [
"physics.soc-ph"
],
"doi": "10.1088/0305-4470/39/9/002",
"title": "Criterion for traffic phases in single vehicle data and empirical test of a microscopic three-phase traffic theory",
"url": "https://arxiv.org/abs/physics/0507094"
},
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