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On the mathematical theory of vehicular traffic flow II: Discrete velocity kinetic models

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TLDR
The discretization overcomes, at least in part, some technical difficulties related to the selection of the correct representation scale, while the adaptative grid allows an improved description of various phenomena related to vehicular traffic flow.
Abstract
This paper deals with the modelling of vehicular traffic flow by methods of the discrete mathematical kinetic theory. The discretization is developed in the velocity space by a grid adapted to the local density. The discretization overcomes, at least in part, some technical difficulties related to the selection of the correct representation scale, while the adaptative grid allows an improved description of various phenomena related to vehicular traffic flow. Specific models are proposed and a qualitative and computational analysis is developed to show the properties of the model and their ability to describe real flow conditions. A critical analysis, proposed in the last part of the paper, outlines suitable research perspectives.

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Traffic jams without bottlenecks—experimental evidence for the physical mechanism of the formation of a jam

TL;DR: In this paper, the authors present experimental evidence that the emergence of a traffic jam is a collective phenomenon like "dynamical" phase transitions and pattern formation, and show that a bottleneck is only a trigger and not the essential origin of traffic jam.
Journal ArticleDOI

On the modelling crowd dynamics from scaling to hyperbolic macroscopic models

TL;DR: This paper is devoted to scaling and related representation problems, then the macroscopic scale is selected and a variety of models are proposed according to different approximations of the pedestrian strategies and interactions, and a qualitative analysis of the models is conducted with the aim of analyzing their properties.
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Modeling crowd dynamics from a complex system viewpoint

TL;DR: This paper aims at indicating research perspectives on the mathematical modeling of crowd dynamics, pointing on the one hand to insights into the complexity features of pedestrian flows and on the other hand to a critical overview of the most popular modeling approaches currently adopted in the specialized literature.
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First-order macroscopic modelling of human crowd dynamics

TL;DR: In this paper, the authors deal with the mathematical modelling of crowd dynamics within the framework of continuum mechanics, using the mass conservation equation closed by phenomenological models linking the local velocity to density and density gradients.
References
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Journal ArticleDOI

Traffic and related self-driven many-particle systems

TL;DR: This article considers the empirical data and then reviews the main approaches to modeling pedestrian and vehicle traffic, including microscopic (particle-based), mesoscopic (gas-kinetic), and macroscopic (fluid-dynamic) models.
Journal ArticleDOI

Requiem for second-order fluid approximations of traffic flow

TL;DR: In this paper, it is shown that any continuum model of traffic flow that smooths out all discontinuities in density will predict negative flows and negative speeds (i.e., "wrong way travel") under certain conditions.
Book

Kinetic theory of vehicular traffic

TL;DR: A theory of multi-LANE traffic flow and the space-time evolution of thevelocity distribution of cars are examined to help understand the role of driver behaviour and strategy in this network.
Journal ArticleDOI

On Boltzmann-like treatments for traffic flow: A critical review of the basic model and an alternative proposal for dilute traffic analysis

TL;DR: The basic features of the Boltzmann-like model for traffic flow, due to Prigogine and coworkers, are reviewed and an alternative model is proposed for dilute traffic conditions.
Journal Article

The Physics of Traffic: Empirical Freeway Pattern Features, Engineering Applications, and Theory

TL;DR: This book introduces a new traffic flow theory called "three-phase traffic theory," which can explain empirical spatiotemporal traffic patterns and results of an application of the pattern features to engineering applications without complex mathematical models.
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