Raimbault, J;
(2017)
Investigating the Empirical Existence of Static User Equilibrium.
Transportation Research Procedia
, 22
pp. 450-458.
10.1016/j.trpro.2017.03.053.
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Abstract
The Static User Equilibrium is a powerful framework for the theoretical study of traffic. Despite the restricting assumption of stationary flows that intuitively limit its application to real traffic systems, many operational models implementing it are still used without an empirical validation of the existence of the equilibrium. We investigate its existence on a traffic dataset of three months for the region of Paris, FR. The implementation of an application for interactive spatio-temporal data exploration allows to hypothesize a high spatial and temporal heterogeneity, and to guide further quantitative work. The assumption of locally stationary flows is invalidated in a first approximation by empirical results, as shown by a strong spatial and temporal variability in shortest paths and in network topological measures such as betweenness centrality. Furthermore, the behavior of spatial autocorrelation index of congestion patterns at different spatial ranges suggest a chaotic evolution at the local scale, especially during peak hours. We finally discuss the implications of these empirical findings and describe further possible developments based on the estimation of Lyapunov dynamical stability of traffic flows.
Type: | Article |
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Title: | Investigating the Empirical Existence of Static User Equilibrium |
Location: | Tech Univ Istanbul, Istanbul, TURKEY |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1016/j.trpro.2017.03.053 |
Publisher version: | https://doi.org/10.1016/j.trpro.2017.03.053 |
Language: | English |
Additional information: | Copyright © 2017 The Authors. This is an Open Access article published under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) Licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Static User Equilibrium, Spatio-temporal Data Visualization, Spatio-temporal stationarity, Dynamical Stability |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Centre for Advanced Spatial Analysis |
URI: | https://discovery.ucl.ac.uk/id/eprint/10071805 |
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