Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"user equilibrium"”.
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Robust transportation network design under user equilibrium
… optimize their own travel costs (i.e., the "user-equilibrium" condition). Under deterministic demand, we propose an exact integer optimization approach that leads to a quadratic objective, linear constraints optimization problem. As a result, the problem is efficiently solvable via commercial …
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Application of user equilibrium traffic assignment in evacuation modelling
… major effort in this research is to include the user equilibrium assignment method to reduce the evacuation times and to improve highway network performance. Evacuation routes, number of links used, and evacuation times etc. are found to be influenced by the user equilibrium assignment method. …
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Work Zone Analysis Under Detour Settings
… within the transportation network and let users find the shortest paths which will eventually come to equilibrium. The total work zone cost consists of total delay cost, work zone set-up cost and accident cost. The analysis is based on an illustrative transportation network, the Sioux-Falls …
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An adaptive strategy for providing dynamic route guidance under non-recurrent traffic congestion
… benefits to overall system as well as individual users. Infrastructure based DRGS have advantage of pursuing system optimal routing strategy, which is more essential under abnormal traffic conditions such as non-recurrent congestion and natural disaster. However user compliance could be a problem …
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Implementation and Evaluation of Network Equilibrium Models of Urban Residential Location and Travel Choices
… questions of developing and evaluating network equilibrium models for combining urban residential location and travel choices. Three models are formulated for consideration of travelers' behavior; each of them represents a specific decision structure of travelers' location and mode choices on …
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Algorithms for Multi-objective Network Equilibrium Problems
… real life processes can be modelled as network equilibrium problems. Such models originate in areas as diverse as transportation, telecommunication, supply chains and energy. In this thesis we focus on a particular application of network equilibrium models called traffic assignment (TA). The TA …
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Stochastic numerical approximation approaches for estimation of traffic volume under travel demand uncertainties
… assignment problem, specifically the network user equilibrium problem solved using the variational inequality method, under demand uncertainties modeled as random inputs. Smolyak sparse grid interpolation technique was successfully applied to the problem and compared to Monte Carlo sampling. …
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Multiclass Origin-Destination Estimation Using Multiple Data Types
… model is assumed in the lower-level stochastic user equilibrium problem for flow prediction. Extensive experiments have been performed on a test network with different types of link count sensors and turning movements. The tests verify the problem formulation and solution algorithm, and offer …
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Modeling Automated Highway System Guideway Operations
… the guideway links. Both operational concepts of user equilibrium and system optimal conditions are explored, and equations are found to estimate the amount of traffic which can be found on the links based on the total traffic volume.
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Optimal Pricing and Capacity Planning in Operations Management
… firm to choose the facility for service and a user equilibrium model where customers choose the facilities that provide the best utility to them. We investigate the properties of the optimal solutions. Heuristic algorithms are developed for the user equilibrium model. Our results show that …
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Optimized scheduling of highway work zones
… total project cost (i.e., agency cost and road user cost) by optimizing work zone schedules. This dissertation focuses on the maintenance projects on multiple-lane highways. The objective total cost function is formulated while considering a discrete maintenance time-cost function and …
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Dynamic traffic congestion pricing mechanism with user-centric considerations
… difficulty, we propose a novel mechanism called User-Centric Dynamic Pricing (UCDP) based on recent advances in algorithmic mechanism design. The mechanism allows for congestion-free traffic in general road networks with heterogeneous users, while satisfying each user's travel preference. The …
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Efficiency and braess' paradox under pricing in general network
… privately owned networks and serve heterogeneous users with different service needs. The service providers of these networks are interested in maximizing their profit. Since the existing pricing scheme cannot satisfy their needs, the service providers are looking for new pricing mechanisms. …
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Modeling the traffic flow evolution process after a network disruption.
… is rigorously proven to be the classic Wardrop user equilibrium. Its asymptotic stability is guaranteed under mild conditions. Our second innovation is the establishment of a "prediction-correction" framework for modeling traffic evolution after an unexpected network disruption. By studying …
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Application of robust and inverse optimization in transportation
… a transportation network. We assume that users choose the route selfishly and the flow will eventually reach an equilibrium state (User Equilibrium). The first part of the thesis demonstrates how inverse and robust optimization can be used to find the actual travel times given a stable …
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Link State Relationships under Incident Conditions: Using a CTM-based Dynamic Traffic Assignment Model
… to incident management. This thesis presents a user equilibrium Dynamic Traffic Assignment (DTA) model that incorporates the Cell Transmission Model (CTM) to evaluate the temporal variation of flow and density over links, which reflect the link states of a transportation network. Encapsulation …
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Game Theory Approach to Transportation Network Vulnerability Measurement
… Path Algorithm with Entropy function (SPE) & User Equilibrium Assignment with Interest Function (UEI)) are designed to incorporate all origins and destinations in a network in a computationally efficient manner. The presented method differs from previous efforts in that it provides a …
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Infrastructure Condition Assessment and Prediction under Variable Traffic Demand and Management Scenarios
… of the network. Aimsun hybrid macro/meso dynamic user equilibrium experiments were used to simulate the network with a modified cost function taking care of the dynamic pricing along the I-66 tolled facility. Furthermore, the framework was expanded to include the development of a systematic and …
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Enhancements to Transportation Analysis and Simulation Systems
… A solution methodology for computing dynamic user equilibria in large-scale transportation networks is presented in this dissertation. This method, which stems from the convex simplex method, routes one traveler at a time on the network and updates the link volumes and link travel times after …
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Integrated network-based models for evaluating and optimizing the impact of electric vehicles on the transportation system
… examined. Further, a quasi-dynamic stochastic user equilibrium model for combined choices of departure time, duration of stay and route, which integrates the nested-Logit discrete choice model, is formulated as a variational inequality problem. An extension from this equilibrium model is the …
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