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2017 | Book

Traffic Networks as Information Systems

A Viability Approach

Authors: Jean-Pierre Aubin, Anya Désilles

Publisher: Springer Berlin Heidelberg

Book Series : Mathematical Engineering

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About this book

This authored monograph covers a viability to approach to traffic management by advising to vehicles circulated on the network the velocity they should follow for satisfying global traffic conditions;. It presents an investigation of three structural innovations:

The objective is to broadcast at each instant and at each position the advised celerity to vehicles, which could be read by auxiliary speedometers or used by cruise control devices.

Namely,
1. Construct regulation feedback providing at each time and position advised velocities (celerities) for minimizing congestion or other requirements.
2. Taking into account traffic constraints of different type, the first one being to remain on the roads, to stop at junctions, etc.
3. Use information provided by the probe vehicles equipped with GPS to the traffic regulator;
4. Use other global traffic measures of vehicles provided by different types of sensors;

These results are based on convex analysis, intertemporal optimization and viability theory as mathematical tools as well as viability algorithms on the computing side, instead of conventional techniques such as partial differential equations and their resolution by finite difference or finite elements algorithms. The target audience primarily covers researchers and mathematically oriented engineers but the book may also be beneficial for graduate students.

Table of Contents

Frontmatter
Chapter 1. Introduction
Abstract
We survey and summarize the main points raised in this book before describing its organization.
Jean-Pierre Aubin, Anya Désilles
Chapter 2. Celerity Regulators on Networks
Abstract
Knowing where and when one vehicle should arrive, we want to compute from where and when one should depart for reaching timely their desired position. For traveling takes time, duration and uses positions on the network: we take these observations as our data before deriving geodesics starting from a departure position at a departure time for reaching an arrival position at an arrival time. Beforehand, we shall illustrate our results on a road system on the plane.
Jean-Pierre Aubin, Anya Désilles
Chapter 3. Traveling on the Network
Abstract
This chapter gathers most of the definitions and examples of traffic concepts studied in this book: averagers of evolutionary systems, Cournot maps and reachable maps, incoming and outgoing maps, intermodal traffic systems punctuated by junctions (and synapses in neural networks), etc.
Jean-Pierre Aubin, Anya Désilles
Chapter 4. Viability Characterizations and Construction of Celerity Regulators
Abstract
This chapter provides the mathematical characterization of averagers, Cournot, reachable and Eupalinian maps without using the evolutions governed by the differential inclusions involved in their definitions. Hence, the resolution of differential inclusion is bypassed and those maps are automatically triggered to associate their inputs and their outputs. This is possible by characterizing their graphs in terms of viable capture basins of adequate “characteristic” targets viable in “characteristic” environments under “characteristic” systems to be constructed in each case.
Jean-Pierre Aubin, Anya Désilles
Chapter 5. Traffic Specifications
Abstract
Many other requirements, besides the minimal demand of staying on the network, require other variables, called specifications \(z \in \mathbb {R}^{|z|}\) (acceleration, congestion, vehicles ahead, etc.), must be added to time, duration and position. Consequently, we introduce the specific traffic variable described by (topz), replacing the simpler traffic variable (top). Examples of specifications reviewed are duration with variable fluidities, accelerations as well as positions and velocities of a fleet of vehicles. Other ones (accumulation of vehicles on an evolving road segment, for instance) will be introduced together with indicators in Chap. 6, p. 145, dealing with micro-meso-macro systems.
Jean-Pierre Aubin, Anya Désilles
Chapter 6. Valuation of Intertemporal Micro–Meso–Macro Systems
Abstract
In this chapter, we add to micro variables and/or meso variables a macro-variable, which is a numerical indicator that can also be used as a criterion for intertemporal optimization of criteria (called Lagrangians) involving the micro–meso viable evolutions and their derivatives.
Jean-Pierre Aubin, Anya Désilles
Chapter 7. Variational Analysis of Traffic Evolutions
Abstract
We provided several celerity regulators in the preceding chapter. This one adds another approach to the viability one, the “variational” approach, going back to Maupertuis, Lagrange, Hamilton and so many authors.
Jean-Pierre Aubin, Anya Désilles
Chapter 8. Mathematical Appendixes
Abstract
We gather and summarize in this heteroclite chapter some definitions and results used in this book for easing its reading: Sect. 8.1, p. 211, Set-Valued Maps, defines them and provides the definitions of continuity, which are extended in Sect. 8.2, p. 216, to relations.
Jean-Pierre Aubin, Anya Désilles
Backmatter
Metadata
Title
Traffic Networks as Information Systems
Authors
Jean-Pierre Aubin
Anya Désilles
Copyright Year
2017
Publisher
Springer Berlin Heidelberg
Electronic ISBN
978-3-642-54771-3
Print ISBN
978-3-642-54770-6
DOI
https://doi.org/10.1007/978-3-642-54771-3