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.
Results
Showing 1 to 20 of 41 for “"Signal Timing"”.
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Intelligent dynamic signal timing optimization program
In this research the development of a signal timing optimization model for oversaturated urban traffic networks with stochastic driver behavior and vehicle arrival headway is presented. The model is called Intelligent Dynamic Signal Timing Optimization Program or IDSTOP. IDSTOP is formulated as a …
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Weather Impacts on Traffic Parameters and Signal Timing Performance
… to assess benefit of weather responsive signal retiming. Traffic signal optimization and simulation software were used to assess the impact of rainfall and benefit of retiming on travel time and average delay on a section of a hypothetical roadway. Rainfall increased travel time and …
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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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Dynamic Connected Automated Vehicle Trajectory and Traffic Signal Timing Optimization
… 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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Exploring the Considerations of School Zone Speed Control in Traffic Signal Timing
… control, the potential of utilizing traffic signal timing strategies to influence driver behavior and maintain reduced speeds in school zones remains largely unexplored in the literature. This study aims to develop a data-driven methodology based on probe vehicle trajectory data to explore …
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Signal timing optimization based on minimizing vehicle and pedestrian delay by genetic algorithm
… an effective procedure to optimize intersection signal timing by minimizing total delay for both vehicles and pedestrians. The second objective is to establish guidance for pedestrian crossing phase selection (two-way or scramble) and the length of WALK phase when scramble crossing is used. An …
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Vehicle Wheel Energy Reduction at Intersections using Signal Timing and Adaptive Cruise Control
… in this paper focuses on the design of a Signalized Intersection Control Strategy. First, research is performed on different methods of intersection control and implementation with an existing Model Predictive Adaptive Cruise Controller. Based on ease of integration into an existing tuned …
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An energy investigation of signalized network optimized by TRANSYT 7
… or in a network of intersections is the traffic signal timing. In recent years, several computer programs have been developed to aid the traffic engineer in signal timing. This thesis examines the effect of the signal timing plans generated by one of the more widely used programs, TRANSYT 7, on …
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SAFE REINFORCEMENT LEARNING-BASED GREEN LIGHT OPTIMAL SPEED ADVISORY FOR MIXED-TRAFFIC PLATOONS
… and red-light safety. Fourth, we address signal timing undertainty by leveraging CP to estimate a confidence interval of the signal timing prediction results. We present the training and testing results of our proposed RL-based GLOSA under different penetration rates of CAVs. These results …
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Methodology to Assess Traffic Signal Transition Strategies Employed to Exit Preemption Control
… 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 the …
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Dynamic Time Warping Constraints for Semiconductor Processing
… a notable challenge for monitoring time series signals are the nonlinear variations in signal timing. These small, but acceptable, temporal variations are typically caused by small run-to-run differences that are inherent to the process. Dynamic time warping (DTW) can be used for temporal …
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The network design problem: The traffic-responsive signal control scheme
… Design Problem (NDP): the Traffic-Responsive Signal Control (TRSC) scheme. The TRSC scheme considers the effect of signal controls on traffic flows in the standard traffic assignment problem through the integration of traffic control and traffic assignment submodels. Alternative problem …
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Microscopic Control Delay Modeling at Signalized Arterials Using Bluetooth Technology
… measure for any intersection to improve the signal timing plans dynamically in real-time and hence improve the overall system performance. Control delay estimates helps to determine the level-of-service (LOS) characteristics of various approaches at an intersection and takes into account …
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Machine-learning-based vehicle delay prediction at signalized intersections
Delay is one of the critical elements of signalized intersections performance measures. Field delay calculations are usually time-consuming and inefficient and dominantly rely on manual observations and post-calculations or complicated infrastructure configurations of detectors and vehicular …
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Using the Macroscopic Fundamental Diagram to Characterize the Traffic Flow in Urban Network
… of control strategy can optimize the signal timing plan for the links with high congestion and spillbacks. With the proposed control strategy, the location of points are shifted from lower MFDs to upper MFDs which means the congestion are reduced and the overall network traffic flow …
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Evaluation and Installation Guidelines for Advance Warning Signal Systems in Utah
Advance warning signals (AWS) provide information warning drivers in advance of the end-of-green phase for an approaching signalized intersection. The purpose of this research was to develop guidelines for the placement of AWS in Utah, both conditions to evaluate the need for AWS installation and …
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DEVELOPMENT OF SPATIOTEMPORAL CONGESTION PATTERN OBSERVATION MODEL USING HISTORICAL AND NEAR REAL TIME DATA
… events, accidents, inclement weather, poor signal timing, etc. The work presented here demonstrates an approach to effectively identifying spatiotemporal patterns of traffic congestion at a network level. The Metro Atlanta highway network was used as a case study. Real time traffic data was …
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A Bi-Level Programming Formulation and Heuristic Solution Approach for Traffic Control Optimization in Networks With Dynamic Demand and Stochastic Route Choice
… heuristic solution approach is applied in two signalized networks to search for the optimal signal control plan with the consideration of dynamic demand and stochastic route choice. To study the impact of different levels of ITS implementation in a transportation system, this research compares …
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Gamma Veto Detectors in the KOPIO Experiment
… inside a magnetic field, and must have signal timing fast enough to accommodate the rate at which these decays occur. A detector consisting of alternating layers of scintillator and lead, with wavelength-shifting fibers embedded in the scintillator, provides the characteristics sought …
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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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