1st Edition

Pedestrian Dynamics Mathematical Theory and Evacuation Control

By Pushkin Kachroo Copyright 2009
    169 Pages 65 B/W Illustrations
    by CRC Press

    Homeland security, transportation, and city planning depend upon well-designed evacuation routes. You can’t wait until the day of to realize your plan won’t work. Designing successful evacuation plans requires an in-depth understanding of models and control designs for the problems of traffic flow, construction and road closures, and the intangible human factors. Pedestrian Dynamics: Mathematical Theory and Evacuation Control clearly delineates the derivation of mathematical models for pedestrian dynamics and how to use them to design feedback controls for evacuations.

    The book includes:

    • Mathematical models derived from basic principles
    • Mathematical analysis of the model
    • Details of past work
    • MATLAB® code
    • 65 figures and 400 equations

    Unlike most works on traffic flow, this book examines the development of optimal methods to effectively control and improve pedestrian traffic flow. The work of a leading expert, it examines the differential equations applied to conservation laws encountered in the study of pedestrian dynamics and evacuation control problem. The author presents new pedestrian traffic models for multi-directional flow in two dimensions. He considers a range of control models in various simulations, including relaxed models and those concerned with direction and magnitude velocity commands. He also addresses questions of time, cost, and scalability. The book clearly demonstrates what the future challenges are and provides the tools to meet them.

    Introduction

    Motivation

    Literature Survey

    Outline

    Derivation of Conservation Laws

    Mass Conservation

    Momentum Conservation

    Energy Conservation

    Combined Equations

    General Conservation

    Traffic Models: One Dimensional Case

    Lighthill-Whitham-Richards Model

    Payne-Whitham Model

    Aw-Rascle Model

    Zhang Model

    Pedestrian and Control Models in One Dimension

    Traffic Models: Two-Dimensional Case

    Two-Dimensional LWR Model

    Two-Dimensional Payne-Whitham Model

    Two-Dimensional Aw-Rascle Model

    Two-Dimensional Zhang Model

    Conservation Law Solutions

    Method of Characteristics

    Classical or Strong Solutions

    Weak Solutions

    Scalar Riemann Problem

    Admissibility Conditions

    Kruzkov’s Entropy Function

    Well-posedness

    Oleinik Entropy Condition

    Scalar Initial-Boundary Problem

    Traffic Control

    Scalar Conservation Law Solution

    Dynamical Systems and C0-Semigroups

    Optimal Control

    Optimal Flux Control for Scalar Conservation Law

    Feedback Control for Scalar Law

    Advective Feedback Control for Relaxation Systems

    Wellposedness for Bounded Advection Control

    Simulations for Advective Control

    Godunov’s Method

    Simulation Results for Advective Control

    Conclusions

    Summary

    Contributions

    Future Work

    Biography

    Pushkin Kachroo