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 30 for “"crash severity"”.
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Crash severity modeling in transportation systems
Modeling crash severity is an important component of reasoning about the issues that may affect highway safety. A better understanding of the factors underlying crash severity can be used to reduce the degree of crash severity injury, locate road hazardous sites, and adopt suitable countermeasures. …
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Investigation of Trends and Predictive Effectiveness of Crash Severity Models
… regression to uncover temporal patterns in the severity level (fatal, serious injury, minor injury, slight injury or no injury) for persons involved in highway crashes in Connecticut, focusing on the demographic split between senior travelers (65 years and over) and non-senior travelers. …
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Applications of Event Data Recorder Derived Crash Severity Metrics to Injury Prevention
… been more than 35,000 fatalities annually due to crashes on United States roads [1], [2]. Typically, road departure crashes account for less than 10% of all annual crash occupants yet comprise nearly one third of all crash fatalities in the US [3]. In the year 2020, road departure crashes …
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Evaluating Factors Contributing to Crash Severity Among Older Drivers: Statistical Modeling and Machine Learning Approaches
Road crashes pose a significant public health issue worldwide, often leading to severe injuries and fatalities. This dissertation embarks on a comprehensive examination of the factors affecting road crash severity, with a special focus on older drivers and the unique challenges introduced by the …
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Analyzing and Modeling the Effects of Independent Variables on Texas Severe Work Zone Crashes
Previous literature and research on work zone crashes seem to reach a similar conclusion that frequency and severity of crashes in work zones is dependent on causative factors that range from Endogenous factors (which in this study will be referred to as factors that are components of the work zone …
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Factors Affecting Severity Level in Speed-Related Crashes and in Identification of Crashes Involving Exceeding Maximum Safe Travel Speed
This research investigates factors that influence severity of speed-related crashes on mainline roadway segments, with a particular emphasis on comparing single-vehicle and multiple-vehicle incidents and distinguishing between crashes involving legal speed limit violations and those exceeding the …
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A Prioritization Process for Access Management Implementation in Utah
… identifying features, characteristics, and crash history for 175 arterial road segments on Utah state routes. Stepwise linear regression was applied to the data collected to determine which characteristics of the roads were correlated with crash rate, crash severity, and specific collision …
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Analysis of Association Between Demographic, Socioeconomic, and Built Environment Factors and Pedestrian Safety Using Traditional and AI Approaches
… development. To better understand pedestrian crash risks, this dissertation explores the relationship between built-environment and socio-economic factors and their influence on crash risks at the Census Block Groups (CBGs) level in Austin, San Antonio, and Dallas. Given the spatial nature of …
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Methodology for Determining Crash and Injury Reduction from Emerging Crash Prevention Systems in the U.S.
… or mitigate the negative consequences of traffic crashes, automakers are developing active safety systems, which aim to prevent or mitigate collisions. These systems are expensive to develop and as a result automakers and regulators are motivated to forecast the potential benefits of a proposed …
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The Potential of Event Data Recorders to Improve Impact Injury Assessment in Real World Crashes
… provide novel insight into motor vehicle crash characteristics. The "black boxes" in automobiles, EDRs directly measure precrash and crash kinematics. This data has the potential to eclipse the many traditional surrogate measures used in vehicle safety that often rely upon assumptions and …
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Studio di un sistema di ritenuta stradale con montanti e nastri in legno
… world for the fast dynamic events and for the crash tests. Research is focused on the calculation of crash severity indices called ASI and THIV.
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Identification of high "risk" pedestrian locations
… locations were identified based on analyses of crash data. The crash locations were ranked based on several factors such as crash severity, age group, characteristics of pedestrians involved in crashes, and indicators of traffic and pedestrian exposure. Criteria were developed such that …
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Analysis Of Type And Severity Of Traffic Crashes At Signalized Intersections Using Tree-based Regression And Ordered Probit Models
… the factors that contribute to traffic crashes at such locations. One approach is to model crash occurrences based on configuration, geometric characteristics and traffic. Instead of combining all variables and crash types to create a single statistical model, this analysis created …
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Modeling Driving Risk Using Naturalistic Driving Study Data
Motor vehicle crashes are one of the leading causes of death in the United States. Traffic safety research targets at understanding the cause of crash, preventing the crash, and mitigating crash severity. This dissertation focuses on the driver-related traffic safety issues, in particular, on …
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Safety Evaluation of Freeway Exit Ramps
… the different factors contributing to the crashes happening on the exit ramp sections. To achieve the research objectives, the research team investigated crash history at 424 sites throughout Florida. The study area includes two parts, the freeway diverge area and the exit ramp sections. …
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Predicting Occupant Injury with Vehicle-Based Injury Criteria in Roadside Crashes
… typically used to assess occupant injury risk in crashes involving roadside hardware such as guardrail. These metrics attempt to derive the risk of injury based solely on the response of the vehicle during a collision event. The primary purpose of this research effort was to determine if …
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The socioeconomic consequences of the U.S. fracking boom
… of the fracking-related trucking on fatal crashes using evidence from North Dakota. A Poisson estimation shows that an additional post-fracking well within six miles of a road segment not only increased the count of fatal crashes involving large trucks by 7.5% but also intensified the crash …
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Investigation of W-Beam Energy-Absorbing Guardrail End Terminal Safety Performance Using Finite Element Modeling
… cause 10% of deaths of vehicle-to-fixed object crashes which has attracted attention in the highway safety community on the vehicle-based injury criteria used in guardrail regulations. The objectives of this study were 1) to develop and validate a Finite Element (FE) model of the ET-Plus, a …
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Safety Effects Of Traffic Signal Installations On State Road Intersections In Northeast Florida
… 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 Traffic Control Devices …
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The Crash Injury Risk to Rear Seated Passenger Vehicle Occupants
… of serious injury and fatality in motor vehicle crashes than their front seat counterparts. However, many passive safety advancements that have occurred over the past few decades such as advanced airbag and seatbelt technology primarily benefit occupants of the front seat. Indeed, safety for …
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