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 71 for “"signalized intersections"”.
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Quality Of Service Measures At Signalized Intersections
… measures to describe the quality of service at signalized intersections provided by different designs and controls has been discussed in numerous conferences. Such measures may include driver's comfort, convenience, anxiety, and preferences. The primary objective of this study was to demonstrate …
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Estimating Pedestrian Crashes at Urban Signalized Intersections
… policy makers to evaluate pedestrian safety at signalized intersections in an urban environment.
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Predictive Path Planning For Vehicles at Non-signalized Intersections
In the context of path planning, the non-signalized intersections are always a challenging scenario due to the mixture of traffic flow. Most path planning algorithms use the information at the current time instance to generate an optimal path. Because of the dynamics of the non-signalized …
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Modeling Crash Frequencies At Signalized Intersections In Central Flor
… of highway crashes in the United States occur at intersections. These crashes result in property damage, lost productivity, injury, and even death. Identifying intersections associated with high crash rate is very important to minimize future crashes. The purpose of this study is to develop …
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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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Motion Planning For Autonomous Vehicles In Non-Signalized Intersections
… driving scenarios such as navigating non-signalized intersections. These intersections lack organized traffic flow, which raises the risk of accidents. Rapidly Exploring Random Trees (RRT) is a widely adopted algorithm in robotics for motion planning due to its simplicity and probabilistic …
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Eco-cooperative adaptive cruise control at multiple signalized intersections
… vehicle trajectory while traversing multiple signalized intersections. The proposed system utilizes signal phasing and timing (SPaT) information together with real-time vehicle dynamics data to compute the optimal acceleration/deceleration levels and cruise speeds for …
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Stochastic Methods for Dilemma Zone Protection at Signalized Intersections
… is a major reason for the crashes at high-speed signalized intersections. As a result, how to prevent approaching vehicles from being caught in the DZ is a widely concerning issue. In this dissertation, the author addressed several DZ-associated issues, including the new stochastic safety …
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Modeling Permissive Left-Turn Gap Acceptance Behavior at Signalized Intersections
… behavior for permissive left turn movements at signalized intersections. The thesis attempts to model the gap acceptance behavior using three different approaches, a deterministic statistical approach, a stochastic approach, and a psycho-physical approach. First, the deterministic statistical …
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Study of car-bicycle safety at signalized intersections from multi-aspects
… the most vulnerable road users. Especially at intersections, many bicycles collide with passenger cars despite the control of traffic signals. This thesis focuses on car-bicycle safety at signalized intersections. Various factors contribute to the occurrence of road accidents, namely factors …
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Analysis of the crash potential at signalized intersections with trap lanes
… a trap lane may influence the crash potential at signalized intersections. Field and historical data from fifty-four locations within the Las Vegas Metropolitan Area were used for the analysis. Bivariate and subset linear regression analyses were used to evaluate the relationship of several …
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Safety Analyses At Signalized Intersections Considering Spatial, Temporal And Site Correlation
Statistics show that signalized intersections are among the most dangerous locations of a roadway network. Different approaches including crash frequency and severity models have been used to establish the relationship between crash occurrence and intersection characteristics. In order to model …
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Development of Arrival-Type-Based Uniform Delay Models for Signalized Intersections
The resulting models: (1) Consider platoon duration, flow rate and/or number of vehicles in platoon, (2) Are sensitive to traffic volume inside platoon, and (3) because a distinct delay model was deduced for each arrival type, the need for applying delay adjustment factors was eliminated. …
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Eco-Cooperative Adaptive Cruise Control at Signalized Intersections Considering Vehicle Queues
… Phasing and Timing (SPaT) data form downstream signalized intersections via vehicle-to-infrastructure communication. The algorithm that was developed in an earlier study provides advisory speed recommendations to drivers to reduce vehicle fuel consumption levels in the vicinity of traffic …
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Analysis Of Queue Characteristics At Signalized Intersections Near Highway-Railroad Grade Crossing
<p>Analysis of traffic queues at signalized intersections which are in close proximity to highway- railroad grade crossings is of primary importance for determining if the normal signal operation needs to be preempted for railroad operations by providing a special signal mode for safe clearance of …
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Development of Arrival Time Based Uniform Delay Models for Oversaturated Signalized Intersections
Comparisons of control delays show that HCM estimates were not significantly different from the simulated filed data generated by CORSIM for 12 scenarios out of 28 for zero initial queue conditions, and 14 scenarios out of 28 for nonzero initial queue conditions, however for the remaining scenarios …
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Safety Issues Of Red-light Running And Unprotected Left-turn At Signalized Intersections
… or left turning are most likely to occur at signalized intersections and resulted in substantial severe injuries and property damages. This dissertation mainly focused on these two types of vehicle crashes and the research methodology involved several perspectives. To examine the overall …
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Comparison of stopped delay between field measurements and HCM 2010 estimations at actuated signalized intersections
… is widely used for performance evaluation of signalized intersections. However, very few studies have been performed to validate the HCM delay estimation model. This thesis aims to study the accuracy of the HCM 2010 delay estimation methodology for actuated signalized intersections using field …
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