Traffic Theory

Traffic Theory

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English

Description

Traffic Theory describes and illustrates the key models of traffic flow and associated traffic phenomena such as conflicts in traffic, traffic generation and assignment, and traffic control. The use of these various models are explored both in terms of how they have improved traffic systems over the years and how better implementation of these models can accelerate the successful deployment of Intelligent Transportation Systems (ITS). Furthermore, the book outlines opportunities for development of additional models needed for continued improvement of ITS.
The book is intended as a textbook for a college Transportation Science curriculum, and as a reference book for researchers in Transportation Science. Dr. Gazis has concentrated in the book's presentation on the fundamental concepts and methods in the various areas of traffic theory.

Subjects

Informations

Published by
Published 01 January 1983
Reads 12
EAN13 0306482177
License: All rights reserved
Language English

Legal information: rental price per page €. This information is given for information only in accordance with current legislation.

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CHAPTER1. TRAFFIC FLOW THEORIES
Macroscopic Traffic Flow Theory – Kinematic Waves in Traffic Shock waves 6 Flow versus concentration relationships 9
The Boltzmanlike Model of Traffic The twofluid model of traffic 19
CONTENTS
Microscopic Traffic Flow Theory – CarFollowing Models Local stability 22 Asymptotic stability 26 Acceleration noise 31 Nonlinear carfollowing models 33
Some Questionable Paradoxes The Smeed paradox 36 The Braess paradox 38
Additional Flow Theory Work, and Future Challenges
1
1
17
21
36
40
viii
CHAPTER 2. QUEUEING AND DELAYS AT ISOLATED INTERSECTIONS
Traffic Characteristics
The Gap Acceptance Function
The Delay to a Single Car
Delays to Pedestrians
Queueing and Delays of Vehicles
The Delay at a Traffic Signal Evaluation of delays 79 Optimization of traffic signal settings 87 The vehicleactuated traffic signal 89
CHAPTER 3. TRAFFIC CONTROL
Objectives of Traffic Control
Single, Isolated Intersection
Synchronization Schemes for Arterial Traffic A mixed integerlinear programming approach The effect of queues on progression 115 The TRANSYT method 118 The Combination method 121 The SIGOP program 124
112
Traffic Responsive Operation of Traffic Lights Single intersection 128 Systems of intersections 132 Additional contributions: The SCOOT program 135 The OPAC, PRODYN, CRONOS, and COP programs
The Onset of Oversaturation
135
45
46
49
50
63
71
77
101
103
105
106
128
136
Oversaturated Systems A single oversaturated intersection 138 Complex oversaturated systems 154
Oversaturated StoreandForward Networks
Freeway Control
Systems Affected by Geometric Details
CHAPTER 4. TRAFFIC GENERATION, DISTRIBUTION, AND ASSIGNMENT
Network Representation of a Transportation System
Trip Generation and Distribution Trip generation 190 Trip distribution 198
TimeIndependent Traffic Assignment Deterministic traffic assignment models 207 Discrete choice, stochastic, models 211 Global Network Optimization Models 219
Dynamic Traffic Assignment
Traffic Assignment in Congested Systems Delivery of traveller information services
APPENDIX
Application of Kalman Filtering for Density Estimation in Traffic Networks
Index
237
ix
138
165
171
172
185
186
189
206
225
229
245
257