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 91 for “"Traffic signal"”.
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Multi-objective Optimization in Traffic Signal Control
Traffic Signal Control systems are one of the most popular Intelligent Transport Systems and they are widely used around the world to regulate traffic flow. Recently, complex optimization techniques have been applied to traffic signal control systems to improve their performance. Traffic simulators …
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Improving traffic signal performance using high-resolution data
Traffic congestion has become a more and more severe problem for metropolitan areas all over the world. Although lots of effort has been devoted to improve the operation on major corridors, how to efficiently and effectively manage traffic based on the existing infrastructure is still a challenging …
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Street Traffic Signal Optimal Control for NEMA Controllers
This dissertation aims to reduce urban traffic congestion with street traffic signal control. The traffic signal controllers in the U.S. follow the National Electrical Manufacturing Association Standards (NEMA Standards). In a NEMA controller, the control parameters for a coordinated control are …
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Design of Wet Surface Traffic Signal Timing Change Intervals
Driver violations of traffic signals are a major cause of intersection vehicle crashes. The duration of yellow intervals is highly associated with driver yellow/red time stopping behavior. Rainy weather and wet pavement surface conditions may result in changes in both driver behavior and vehicle …
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Right-turn Traffic Volume Adjustment in Traffic Signal Warrant Analysis
… was based on the research project, Right-Turn Traffic Volume Adjustment in Traffic Signal Warrants, sponsored by the Nevada Department of Transportation (NDOT). Right-turn traffic does not affect intersection performance in the same magnitude as through or left-turn traffic. Therefore, it is …
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Integration of predictive routing information with dynamic traffic signal control
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Dynamic Connected Automated Vehicle Trajectory and Traffic Signal Timing Optimization
… of sustainable transportation in the context of traffic signalized networks by optimizing both vehicle and traffic signal operations. From the vehicle side, the research develops a Green Light Optimal Speed Advisory (GLOSA) system also known as an Eco-Cooperative Adaptive Cruise Control system at …
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Isolated Traffic Signal Optimization Considering Delay, Energy, and Environmental Impacts
Traffic signal cycle lengths are traditionally optimized to minimize vehicle delay at intersections using the Webster formulation. This thesis includes two studies that develop new formulations to compute the optimum cycle length of isolated intersections, considering measures of effectiveness such …
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An Assessment Methodology for Emergency Vehicle Traffic Signal Priority Systems
Emergency vehicle traffic signal priority systems allow emergency vehicles such as fire and emergency medical vehicles to request and receive a green traffic signal indication when approaching an intersection. Such systems have been around for a number of years, however, there is little …
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Decentralized graph-based multi-agent reinforcement learning for traffic signal optimization
Signalized intersections are persistent bottlenecks where inefficient operations contribute to congestion, delays, safety risks, and environmental impacts. Conventional control strategies provide stability under predictable demand but lack the adaptability required to manage stochastic and …
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Modelling drivers’ behaviour within the dilemma zone at traffic signal junctions
… decisions following the onset of an amber traffic light signal under the effect of the dilemma zone where a driver can neither stop safely nor cross and clear the junction before the onset of red. The purpose of building this model is to investigate the effects of various parameters (such …
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Exploring the Considerations of School Zone Speed Control in Traffic Signal Timing
… safety intervention that assists in slowing down traffic and warning drivers to pay more attention to vulnerable road users. This restriction may result in impacts on arterial traffic operations, including speed reduction and potentially additional stops at intersections. Among the various …
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Methodology to Assess Traffic Signal Transition Strategies Employed to Exit Preemption Control
… vehicles to preempt the normal operation of traffic signals has the potential to improve the safety and efficiency of both the requesting vehicle and all of the other vehicles. Little is known about which strategy is the most effective to exit from preemption control and transition back to …
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Safety Effects Of Traffic Signal Installations On State Road Intersections In Northeast Florida
… thesis is to explore how the installations of traffic signals affect crash experience at intersections, to identify those factors which help predict crashes after a signal is installed, and to develop a crash prediction model. It is the intent of this thesis to supplement the Manual on Uniform …
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Evaluation of Service Reliability Impacts of Traffic Signal Priority Strategies for Bus Transit
… the design, testing, and deployment of traffic signal priority strategies for transit buses. However, a clear consensus has not emerged regarding the evaluation of these strategies. Each agency implementing these strategies can have differing goals, and there are often conflicting …
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eMARLIN: Addressing Coordination and Partial Observability in Distributed Reinforcement Learning for Traffic Signal Control
Traffic congestion is a growing concern in urban areas, pertaining to its significant economic, environmental, and safety impacts. While traditional solutions like infrastructure expansion and public transit development are vital, they involve high budget and time costs. This thesis aims to address …
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Development of Dynamic Traffic Signal Control Procedures for Oversaturated Arterials and Genetic Algorithms Solutions
… such that their implementation for on-line traffic control is possible. Population size was shown to play a significant role in determining quality of terminal solutions. Based on experiments with DSCA, and with sufficient computational resources, micro-GAs performed best when the population …
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Traffic Signal Phase and Timing Prediction: A Machine Learning and Controller Logic Hybrid Approach
… (GLOSA) systems require reliable estimates of signal switching times to improve vehicle energy/fuel efficiency. Deployment of successful infrastructure to vehicle communication requires Signal Phase and Timing (SPaT) messages to be populated with most likely estimates of switching times and …
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