Highway maintenance, especially pavement rehabilitation or resurfacing, requires lane closures. This work develops an integrated model to help highway agencies in developing traffic control plans for maintenance activities and in efficiently managing traffic around highway…
Contents
Chapter I Introduction
1.1 Background1
1.2 Problem Statement
1.3 Research Objectives
1.4 Research Scope and Tasks
1.5 Technical Approach
1.6 Organization of Dissertation
Chapter II Literature Review
2.1 Work Zone Issues
2.2 Work Zone Cost Items
2.3 Research Trends
2.4 Optimization Algorithms
2.5 Summary
Chapter III Work Zone Optimization for Steady Traffic Inflows
3.1 Highway System Definition
3.2 Work Zone Optimization – Two-Lane Two-Way Highway
3.2.1 Alternatives and Assumptions
3.2.2 Model Formulation
3.3 Work Zone Optimization – Four-Lane Two-Way Highway
3.3.1 Alternatives and Assumptions
3.3.2 Model Formulation
3.4 Determination of Work Zone and Detour Speeds
3.5 Threshold Analysis
3.6 Numerical Analysis – Two-Lane Two-Way Highway
3.6.1 Sensitivity Analysis
3.6.2 Selection Guidelines
3.6.3 Optimizing the Diverted Fraction
3.6.4 Summary
3.7 Numerical Analysis – Four-Lane Two-Way Highways
3.7.1 Sensitivity Analysis
3.7.2 Selection Guidelines
3.7.3 Optimizing the Diverted Fraction
3.7.4 Summary
Chapter IV Work Zone Optimization for Time-Dependent Inflows
4.1 Work Zone Cost Function for Time-Dependent Inflows
4.1.1 Model Formulation – Two-Lane Two-Way Highways (Alternative 2.1)
4.1.2 Model Formulation – Four-Lane Two-Way Highways (Alternative 4.1)
4.2 Optimization Methods
4.2.1 Powell’s Method
4.2.2 Simulated Annealing Algorithm
4.3 Numerical Analysis – Two-Lane Two-Way Highway
4.4 Numerical Analysis – Four-Lane Two-Way Highway
4.5 Reliability of Simula ted Annealing
Chapter V Work Zone Optimization with a Detour
5.1 Work Zone Cost Functions with a Detour
5.1.1 Queuing Delay on a Detour
5.1.2 Two-Lane Highway Work Zone with a Detour
5.1.3 Four-Lane Highway Work Zone with a Detour
5.2 Optimization Methods
5.2.1 Uniform Alternatives and Mixed Alternatives
5.2.2 Simulated Annealing Algorithm for Mixed Alternatives with a Single Detour-SAMASD
5.3 Numerical Examples – Two-Lane Highway Work Zone with a Detour
5.4 Numerical Examples – Four-Lane Highway Work Zone with a Detour
5.5 Numerical Examples – Mixed Alternatives
Chapter VI Work Zone Optimization with Multiple Detour Paths
6.1 Types of Multiple Detour Paths
6.2 Optimization Models for Work Zones with Multiple Detour Paths
6.2.1 Extension of Optimization Model for Multiple-lane Highway
6.2.2 Model Formulation
6.2.3 Simulated Annealing Algorithm for Mixed Alternatives with Multiple Detour
Paths – SAMAMD
6.3 Development of Simulation Model
6.3.1 Simulation Model for Work Zone
6.3.2 Evaluation of Optimization Models by Simulation
6.4 Case Study 181
6.4.1 Optimization Results
6.4.2 Current Policy
6.4.3 Simulation Results
Chapter VII Conclusions and Recommendations
7.1 Summary195
7.2 Conclusions
7.2.1 Work Zone Optimization for Steady Traffic Inflows
7.2.2 Work Zone Optimization for Time-Dependent Inflows
7.2.3 Work Zone Optimization with a Detour
7.2.4 Work Zone Optimization for Multiple Detour Paths
7.3 Recommendations for Future Research
Appendix
References
Author: Chen, Chun-Hung
Source: University of Maryland
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