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 266 for “"Traffic flow"”.
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Modeling traffic flow emissions
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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Modelling the driver for traffic flow simulation
For 60 years, engineers have modelled traffic flow for use in roadway analysis and design. A continuing problem with such models, though, is their inability to adequately capture the human element in the system. The human driver does not think and act in precise ways, making him difficult to model …
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Road Traffic Flow Prediction Using Aerial Imagery
… networks. Among other tasks, monitoring road traffic flow is a task well-suited for such networks. While real-time traffic flow estimation systems have been explored at length and exist as commercial services, these systems have limited spatial reasoning and suffer in accuracy when predicting …
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Heterogenous motorised traffic flow modelling using cellular automata
Traffic congestion is a major problem in most major cities around the world with few signs that this is diminishing, despite management efforts. In planning traffic management and control strategies at urban and inter urban level, understanding the factors involved in vehicular progression is …
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Impacts of vehicle automation on traffic flow stability
… of a small number of vehicles in the bulk traffic flow may have substantial implications on the underlying traffic flow and may influence the development of emergent phenomena such as phantom traffic jams, or traffic stability. This dissertation has four main contributions: (i) experimental …
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An advanced algorithm for air traffic flow management
Thesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1997.
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The stochastic air traffic flow management rerouting problem
We formulate a model for planning the rerouting of aircraft to alleviate en-route congestion, with system capacity being modeled stochastically. To overcome problems with tractability, we apply a Dantzig-Wolfe decomposition and present an efficient method for solving it. The decomposed formulation …
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Data-Fitted Generic Second Order Macroscopic Traffic Flow Models
… become a favorable ``second order" macroscopic traffic model, which corrects several shortcomings of the Payne-Whitham (PW) model. The ARZ model possesses a family of flow rate versus density (FD) curves, rather than a single one as in the ``first order" Lighthill-Whitham-Richards (LWR) model. …
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An integrated systems methodology for pedestrian traffic flow analysis
The typical urban pedestrian transportation system involves three basic elements: sidewalks or walkways; midblock or intersection corner, holding, or queueing areas; and pedestrian crossings of roads, rail lines, or other physical features. The pedestrians on sidewalks or walkways have operating …
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Modeling the traffic flow evolution process after a network disruption.
… to a transportation network can disturb traffic flow patterns significantly. To deploy effective and efficient traffic restoration projects, a good prediction of the traffic flow pattern under network disruption is vital. Although traffic flow evolution processes have been modeled in …
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Shape based classification and functional forecast of traffic flow profiles
<p>This dissertation proposes a methodology for traffic flow pattern analysis, its validation, and forecasting. The shape of the daily traffic flows are directly related to the commuter’s traffic behavior which merit analysis based on their shape characteristics. As a departure from the traditional …
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Air traffic flow management at airports : a unified optimization approach
The cost of air traffic delays is well documented, and furthermore, it is known that the significant proportion of delays is incurred at airports. Much of the air traffic flow management literature focuses on traffic flows between airports in a network, and when studies have focused on optimizing …
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Improved methods for solving traffic flow problems in dynamic networks
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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Cyber-security Aware Traffic Flow Modeling and Data Processing Power Optimization
… and challenges at the intersection of traffic engineering and cybersecurity. While CAVs leverage onboard sensors and computing to navigate their environment, the integration of vehicle to vehicle (V2V) and vehicle-to-infrastructure (V2I) communications has elevated expectations for …
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Continuum modeling of the deceleration transient state in stochastic traffic flow
Due to individual driver behavior, a traffic system is subject to many stochastic factors. Deterministic partial differential equations and their extensions, traditionally used in traffic flow modeling, may not be sufficient in applications such as real-time estimation and prediction of traffic …
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ENHANCING TRAFFIC FLOW USING VEHICLE DASHBOARD TRAFFIC LIGHTS WITH V2I NETWORKS
… on streets nowadays makes it hard to manage traffic flow on the streets, especially in regards to intersection management. Research studies have been conducted to replace the Pre-timed traffic lights at the intersections with adaptive traffic lights control systems that base their timings on …
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Methodologies for integrating traffic flow theory, ITS and evolving surveillance technologies
… is to develop methodologies for applying traffic flow theories to various ITS categories through the utilization of evolving surveillance technologies. This integration of theory, measurement and application has been overlooked since the advent of ITS because of the number of disciplines …
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