Control System for Emergency Evacuation

Title: An Integrated Optimal Control System for Emergency Evacuation

How to effectively control evacuation traffic has emerged as one of the critical research issues in transportation community, due to the unusually high demand surge and the often limited network capacity. This dissertation has developed an integrated traffic control system for evacuation operations…


Chapter 1: Introduction
1.1. Background
1.2. Research Objectives
1.3. Dissertation Organization
Chapter 2: Literature Review
2.1. Introduction
2.2. Traffic Routing Strategies in Emergency Evacuation
2.2.1. Network Flow Models
2.2.2. Dynamic Traffic Assignment Models
2.2.3. Other Models
2.3. Contraflow Design in Emergency Evacuation
2.4. Staged Evacuation
2.5. Signal Control in Emergency Evacuation
2.6. Closure
Chapter 3: Modeling Framework
3.1. Introduction
3.2. Major Research Issues
3.3. System Functional Requirements
3.4. System Framework
3.5. Closure
Chapter 4: Control Strategies at the Network Level
4.1. Introduction
4.2. Network Flow Formulations
4.2.1. Network Conversion
4.2.2. Flow Conservation Formulations
4.2.3. Revised Flow Propagation Formulations
4.3. Base Model: Traffic Routing in Concurrent Evacuation
4.3.1. Objective Functions
4.3.2. Operational Constraints
4.3.3. Numerical Test of the Base Model
4.4. Extended Model-I: Contraflow Design
4.4.1. Operational Concerns for Contraflow Design
4.4.2. Key Features of the Elaborated Network for Extended Model-I
4.4.3. Additional Constraints in the Extended Model-I
4.4.4. Numerical Test of the Extended Model-I
4.5. Extended Model-II: Staged Evacuation
4.5.1. Model Assumptions
4.5.2. Objective Function
4.5.3. Additional Operational Constraints
4.5.4. Numerical Test for the Extended Model-II
4.6. Closure
Chapter 5: Signal Optimization at the Corridor Level
5.1. Introduction
5.2. Signal Optimization for a Corridor Operated Individually
5.2.1. Model Formulations
5.2.2. The Solution Algorithm
5.2.3. Case Study
5.3. Signal Optimization for Corridors Operated as an Integrated Network
5.3.1. Model Formulations
5.3.2. Case Study
5.4. Closure
Chapter 6: A Case Study with the Washington D.C. Evacuation Network
6.1. Introduction
6.2. Study Network
6.3. Design Concurrent Evacuation Strategies
6.3.1. Illustration of the Two-Level Operational Structure
6.3.2. Evaluation of the Generated Control Strategies
6.3.3. Analysis of the Evacuation Plan for Further Improvements
6.4. Application of Staged Evacuation Strategies
6.4.1. Experimental Design
6.4.2. Results Analysis
6.5. Closure
Chapter 7: Conclusions and Future Research
7.1. Research Summary and Contributions
7.2. Future Research

Author: Liu, Ying

Source: University of Maryland

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