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 106 for “"traffic simulation"”.
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Navigation agents and traffic simulation
… development of intelligent navigation agents for traffic simulation. Discussions are made on issues considering the underlying data structure, the algorithms used for the creation of the data structures, the specification of various agents, and their performance. It also includes descriptions of …
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Aggregate calibration of microscopic traffic simulation models
The problem of calibration of microscopic simulation models with aggregate data has received significant attention in recent years. But day-to-day variability in inputs such as travel demand has not been considered. In this thesis, a general formulation has been proposed for the problem in the …
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Dynamic load balancing of parallel road traffic simulation
… for parallel execution of microscopic road traffic simulations. Urban road traffic simulation presents irregular, and dynamically varying distributed computational load for a parallel processor system. The dynamic nature of road traffic simulation systems lead to uneven load distribution …
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Calibration Procedure for a Microscopic Traffic Simulation Model
The inputs to a microscopic traffic simulation model generally include quantitative, but immeasurable data describing driver behavior and vehicle performance characteristics. Engineers often use default values for parameters such as car-following sensitivity and gap acceptance because it can be …
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A microscopic traffic simulation model for IVHS applications
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1993.
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Scalable, repeatable, and contention-free parallelization of traffic simulation
… incentives ought to be in order to optimize traffic flow on the network. Developed by the ITS lab, DynaMIT uses simulation to compute the current network state, predict its state in the future and, by extension, compute the incentives to travelers that optimize the global energy gain. While …
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Calibration of mesoscopic traffic simulation models for dynamic traffic assignment
Thesis (S.M. in Transportation)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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Development of a methodology to interface transportation planning and traffic simulation
… to interface transportation planning and traffic simulation. Differences in representations of planning and traffic networks prohibits planners and engineers from sharing the input data for the same area being studied. Therefore the planning data need to be utilized to create data that the …
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Towards Developing an Integrated Microscopic Traffic Simulation Model for Large Road Networks
Traffic jams have become one of the key topics in the 21st century and cause immense losses in productivity, increase CO2 emissions and affect driver stress, travel time predictability and increased wear and tear on vehicles. To test possible countermeasures, optimise existing infrastructure or …
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Evaluation of coordinated and local ramp metering algorithm using microscopic traffic simulation
Ramp meters are special traffic signals at the end of a freeway on-ramp that regulate the flow of traffic onto the mainline. The main purpose of ramp meters is to keep the mainline of the freeway from becoming overly congested, and to maximize the efficient use of freeway capacity. The first use of …
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Evaluation of ramp control algorithms using a microscopic traffic simulation laboratory, MITSIM
… ramp metering depends on various factors (e.g. traffic volume, downstream traffic conditions, queue override policy etc), these algorithms should be evaluated under a wide range of traffic conditions to check their applicability and performance and to ensure their successful implementation. In …
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Calibration and Comparison of the VISSIM and INTEGRATION Microscopic Traffic Simulation Models
Microscopic traffic simulation software have gained significant popularity and are widely used both in industry and research mainly because of the ability of these tools to reflect the dynamic nature of the transportation system in a stochastic fashion. To better utilize these software, it is …
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Computationally efficient offline demand calibration algorithms for large-scale stochastic traffic simulation models
… network model is embedded through a metamodel simulation-based optimization (SO) framework. The computational efficiency is achieved through the analytical network model, which provides the algorithm with low-fidelity, analytical, differentiable, problem-specific structural information and can …
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A dynamic traffic simulation/assignment model in the context of Advanced Driver Information Systems
… of many metropolitan areas which cause excessive traffic delay, instability of travel time generated the need for the development of an Intelligent Vehicle Highway System (IVHS) program that is capable of making significant improvements in mobility, highway safety, and productivity on highways and …
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General Aviation Demand Forecasting Models and a Microscopic North Atlantic Air Traffic Simulation Model
… The second topic is to model the air traffic in the Organized Track System (OTS) over the North Atlantic. We developed a discrete-time event model to simulate the air traffic that uses the OTS. We proposed four new operational procedures to improve the flight operations for the OTS. …
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Surrogate Analysis and Calibration of Safety-Related Driver Behavior Modeling in Microscopic Traffic Simulation and Driving Simulator for Aggressive Driving
… to solve one of the most difficult problems – traffic congestion and safety. Researchers, consultants, and local officials are all attempting to solve these problems with different methods. However, it is apparent that understanding the driving behaviors on the roadway network and implementing …
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Traffic condition tracking and visualization in virtual city testbed
Computer traffic simulation is a tool widely used to understand how humans behave under varying traffic conditions. The Virtual City Testbed is a traffic simulation framework built to closely model human behavior by allowing direct user interaction in the simulation. Using the testbed, human …
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Multi-model simulation-based optimization applied to urban transportation
… agencies often resort to the use of traffic simulation models to evaluate the impacts of changes in network design or network operations. They often have multiple traffic simulation tools that cover the network area where changes are to be made. Nonetheless, these multiple simulators …
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Dynamic Learning and Human Interactions under the Extended Belief-Desire-Intention Framework for Transportation Systems
In recent years, multi-agent traffic simulation has been widely used to accurately evaluate the performance of a road network considering individual and dynamic movements of vehicles under a virtual roadway environment. Given initial traffic demands and road conditions, the simulation is executed …
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