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 20 for “"roadway safety"”.
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Optimizing the selection of rumble strip design and construction
Rumble strips are proven cost-effective roadway safety measures in reducing traffic crashes by generating in-vehicle noise for alerting inattentive drivers who are about to leave their travel lanes and/or approach stop-controlled intersections. Despite these safety benefits, they generate external …
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Understanding Fixed Object Crashes with SHRP2 Naturalistic Driving Study Data
… crashes have long time been considered as major roadway safety concerns. While previous relevant studies tended to address such crashes in the context of roadway departures, and heavily relied on police-reported accidents data, this study integrated the SHRP2 NDS and RID data for analyses, which …
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Developing crash modification factors for operational parameters on urban freeways
Studies have shown that, roadway safety has become an intensively investigated topic with the objective of improved understanding of the factors that cause crashes to occur. However, it has been shown that as traffic volumes continue to increase across the United States, 52% of drivers feel less …
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Guardrail Height Safety Requirements Given Recent Crash History and Evolution of Vehicle Design
… barriers such as guardrails are fundamental to roadway safety, providing a critical last line of defense in preventing vehicles from leaving the roadway and impacting potential hazards. As vehicles are ever changing, it is necessary for guardrail design to adapt in response. Many contemporary …
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Nationwide Pedestrian Safety Analysis Using Crash and Survey Data
Pedestrian safety is studied using two approaches: injury severity modeling using NHTSA’s Crash Report Sampling System crash data and administering a nationwide survey on roadway safety topics. The crash data models identified seven significant independent variables which relate to severe …
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Leveraging Autonomous Vehicles In Transportation Asset Management
… management because accurate sign records support roadway safety, maintenance planning, and asset-level decision making. However, current field inventory, image-log, street-view, mobile mapping, and computer vision methods may be limited when agencies need to update sign records across roadway …
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An Interactive Learning Framework for Understanding Infrastructure Health Monitoring and Leveraging Machine Learning for Safety Improvement
… systems requires more than just reactive safety strategies. It demands a comprehensive understanding of how infrastructure health conditions directly influence crash occurrence and severity patterns. As road networks continue to deteriorate and traffic complexity increases, ensuring …
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Quantifying the Relationship Between Skid Resistance and Wet Weather Accidents for Virginia Data
… the relationship between surface friction and roadway safety has long been recognized, attempts to quantify the effect of pavement skid resistance on wet accident rates have produced inconsistent results. This thesis analyzes the relationships between skid resistance, accident, and traffic data …
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A Comprehensive Mixed-Integer Programming Model to Optimize the Performance of Freeway Service Patrol Programs
… a substantial delay for drivers and reduce the roadway safety. Effective incident management relies on many tools to lessen the overall impact of crashes, road debris, and disabled vehicles. Many urban areas have adopted freeway service patrol (FSP) programs that patrol the freeway network …
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Integrating Novel Connected Vehicle Event Data for Proactive Road Safety Improvement
Despite substantial progress in advancing road safety, fatalities and injuries from road crashes continue to pose a major public health concern globally. This dissertation explored the integration of novel Connected Vehicle (CV) hard braking event (HBE) data for proactive road safety improvement. …
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DATA-DRIVEN METHODS FOR REDUCING WRONG-WAY CRASHES ON FREEWAYS
… wrong way on freeways has been a nagging traffic safety problem since the interstate highway system was founded in the 1950s. Despite four decades of highway striping and sign improvements at freeway interchanges, the problem persists. This paper is to determine the contributing factors to …
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Visibility improvements through information provision regarding sun glare : a case study in Cape Town
… in a driver’s vision can impose a threat to roadway safety due to interference with the driving task. Sun Glare is a hazard that few people anticipate. The sun is most potent to drivers when it is low in the sky on the horizon, particularly an hour or so after sunrise (dawn) and before sunset …
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The Use Of The Ucf Driving Simiulator To Test The Contribution Of Larger Size Vehicles (lsvs) In Rear-end Collisions And Red Light Running On Intersections.
Driving safety has been an issue of great concern in the United States throughout the years. According to the National Center for Statistics and Analysis (NCSA), in 2003 alone, there were 6,267,000 crashes in the U.S. from which 1,915,000 were injury crashes, including 38,764 fatal crashes and …
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Intelligent Cruise Control System Impact Analysis
… control (ICC) has the potential to impact both roadway throughput and safety by assisting drivers in maintaining safe headways. This thesis explores this potential through comparisons of ICC to conventional cruise control (CCC) and manual driving. Accordingly, descriptions are given of both CCC …
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Traffic Safety Investigations for Local Agencies
… is actually regressing in terms of traffic safety. Although state highway safety is improving, local roadway safety may actually be regressing. Approximately three-quarters of all U.S. public roadways, and approximately 80% of all injury accidents fall under the jurisdiction of cities. …
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Improving the Design of Civil Infrastructure Messages for the Public
… can be improved: policy, transportation/roadway safety, and emergency response. Data sources include eight publicly accessible energy policies from 1978-2022, a publicly available dataset of more than 75 thousand WEAs, and a dataset retrieved from Shealy et al. (2020), which collected …
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Comparing LED Lighting Systems in the Detection and Color Recognition of Roadway Objects
… and color recognition distance of potential roadway hazard. Detection distance is regarded as a metric of visibility. Color recognition distance is a metric for comparing the impact of the (Correlated Color Temperature) CCT of each luminaire and their color contrast impact. Mesopic vision, …
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A Dataset of Vehicle and Pedestrian Trajectories from Normal Driving and Crash Events in One Year of Virginia Traffic Camera Data
… VT-CAST (Virginia Traffic Cameras for Advanced Safety Technologies) 2020 dataset. A total of 6,779,726 hours of traffic camera video was captured from live internet streams from December 17, 2019 at 4:00PM to 11:59PM on December 31, 2020. Video was analyzed by a custom R-CNN convolutional neural …
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Investigation of Crashes Involving Vulnerable Roadway Users Utilizing Geographical Information Systems-Driven Spatio-Temporal Statistical Techniques
… to focus on mitigating the vulnerabilities of roadway users as well as investigating the key causes of crashes in order to achieve the desired level of roadway safety. It is imperative that we understand the specific needs of vulnerable roadway users and their involvement in crashes in order to …
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Applied Error Related Negativity: Single Electrode Electroencephalography in Complex Visual Stimuli
Error related negativity (ERN) is a pronounced negative evoked response potential (ERP) that follows a known error. This neural pattern has the potential to communicate user awareness of incorrect actions within milliseconds. While the implications for human-machine interface and augmented …