Sustainability And Environmentally Friendly Methods To Travel Over Waterways,
2022
The University of Akron
Sustainability And Environmentally Friendly Methods To Travel Over Waterways, Kendall Kubus
Williams Honors College, Honors Research Projects
Throughout daily traveling, the main structures used are bridges and tunnels. Bridges are used as overpasses over valleys, canyons, and areas that require a large amount of dirt fill to bring the roadway up to the proper grade. Tunnels are underpasses through mountains, under city limits and waterways. The benefits of building a bridge structure is little preparation goes into earth-work and the transportation of aggregate materials. There is some time spent testing surrounding soil to determine the process that will need to occur for foundation preparations in bridge columns. Options for foundation include different types of drilled shafts, caissons, …
Cruser Place Green Streets Plan,
2022
Virginia Commonwealth University
Cruser Place Green Streets Plan, Neal Friedman
Master of Urban and Regional Planning Capstone Projects
Combining green and complete street design techniques leads to multiple environmental, social and economic benefits that often enhance each other's effectiveness. In urban areas confronting increased pressures of sea level rise, green streets, which incorporate landscaped features or vegetative areas to manage stormwater within the right of way, can be crucial pieces of pedestrian oriented urban design and multimodal planning frameworks that consider and plan for diverse, complementary transportation options. This plan works with the Colonial Place and Riverview Civic League as well as the Norfolk Preservation Collective to come up with green street design recommendations in order to strengthen …
Understanding Perceptions Of Vulnerable Roadway Users On Autonomous Vehicles,
2022
West Virginia University
Understanding Perceptions Of Vulnerable Roadway Users On Autonomous Vehicles, Md Tawhidur Rahman
Graduate Theses, Dissertations, and Problem Reports (ETD)
Public perceptions have been playing an important role in the development of autonomous vehicle (AV) technology. Besides AV and non-AV users, the perceptions of vulnerable roadway users are critical, as AVs will become a part of multimodal transportation system. Pedestrians and bicyclists are among the vulnerable groups of roadway users, as they are relatively unprotected compared to the occupants of AVs or non-AVs. Although AV’s capability to monitor other vehicles has been documented in many studies, there are concerns about AV’s capability in monitoring pedestrians and bicyclists. The overarching goal of this dissertation is to investigate the perceptions of pedestrians …
Towards An Artificial Intelligence Based Decision Support System To Evaluate Various Transit Projects,
2022
CUNY City College
Towards An Artificial Intelligence Based Decision Support System To Evaluate Various Transit Projects, Patricio F. Vicuna
Dissertations and Theses
This dissertation addressed a subset of the Transit Network Design Problem (Transit-NDP), where the main evaluation parameter is the impact of various transit projects – Bus Lines, Tram, Light Rail, Rail – on the Network Travel Time (NTT) of the vehicles. The NTT is estimated using the static four-step travel demand model (trip generation, trip distribution, modal split, and traffic assignment). A set of five metaheuristic models were developed and implemented for this specific Transit-NDP, namely, Simulated Annealing (SA)-VISUM, Simulated Annealing-Random Forest Regression Model (SA-RF), Tabu Search (TS)-Random Forest (TS-RF), SA-RF-TS-VISUM, SA-RF-VISUM. These models were evaluated using two test networks …
Impact Of Covid-19 On Aviation-Wildlife Strikes Across Europe,
2022
German Aerospace Center (DLR)
Impact Of Covid-19 On Aviation-Wildlife Strikes Across Europe, Isabel C. Metz, Marta Giordano, Dionysios Ntampakis, Marianna Moira, Anneke Hamann, Rosanne Blijleven, Jürgen J. Ebert, Alessandro Montemaggiori
Human–Wildlife Interactions
Collisions between aircraft and wildlife (i.e., wildlife strikes) pose a serious threat toward the safety of aircraft, its crew, and passengers. The effects of COVID-19 related travel restrictions on wildlife strikes are unknown. With this study, we aim to address this information gap by assessing the changes of wildlife hazard management performance across European airports during the lockdown period (e.g., period of reduced operations and borders closure in spring 2020). We also sought to raise awareness of the importance of wildlife strike prevention in times of reduced operations. The objective of our study was to compare wildlife strike data before …
Air Passenger Demand Forecast Through The Use Of Artificial Neural Network Algorithms,
2022
Universidad de Granada
Air Passenger Demand Forecast Through The Use Of Artificial Neural Network Algorithms, Juan Gerardo Muros Anguita, Oscar Díaz Olariaga
International Journal of Aviation, Aeronautics, and Aerospace
Airport planning depends to a large extent on the levels of activity that are anticipated. In order to plan facilities and infrastructures of an airport system and to be able to satisfy future needs, it is essential to predict the level and distribution of demand. This document presents a short- and medium-term forecast of the demand for air passengers carried out through a specific case study (Colombia), in which the impact of the pandemic period due to COVID-19 on air traffic was taken into account. To make the forecast, an algorithm that implements techniques based on Artificial Neural Networks (ANN) …
Engineering Countermeasures For Left Turns At Signalized Intersections: A Review,
2022
Old Dominion University
Engineering Countermeasures For Left Turns At Signalized Intersections: A Review, Siby Samuel, Amandeep Singh, Yusuke Yamani
Psychology Faculty Publications
Left turn crashes can impact the safety of the drivers due to the speed and angle at which they occur. Left turns are specifically reported to affect older drivers more than the other types of crashes. This paper provides a review of the existing engineering countermeasures that have been evaluated to improve driver safety at left turns. Twenty- eight studies on left turn signal displays (protected left turns, flashing yellow arrow, and digital countdown timers), intersection geometry (offset left turn lanes, diverging diamond interchange, roundabouts, exit lanes for left turn, left turn bay extension, and contraflow left turn lanes), and …
A Primer On The Human Readiness Level Scale (Ansi/Hfes 400-2021),
2022
Michigan Technological University
A Primer On The Human Readiness Level Scale (Ansi/Hfes 400-2021), Kelly Steelman, Holly Handley, Katie Plant (Ed.), Gesa Praetorius (Ed.)
Engineering Management & Systems Engineering Faculty Publications
"The Human Readiness Level (HRL) Scale is a simple 9-level scale for evaluating, tracking, and communicating the readiness of a technology for safe and effective human use. It is modeled after the well-established Technology Readiness Level (TRL) framework that is used throughout the government and industry to communicate the maturity of a technology and to support decision making about technology acquisition. Here we (1) introduce the ANSI/HFES 400-2021 Standard that defines the HRL scale and (2) provide concrete examples of evaluation activities to support the application of HRLs in the development of automated driving systems."
Adapting The Human Factors Analysis And Classification System For Commercial Fishing Vessel Accidents,
2022
United States Coast Guard
Adapting The Human Factors Analysis And Classification System For Commercial Fishing Vessel Accidents, Peter Zohorsky, Holly Handley, Ronald Boring (Ed.)
Engineering Management & Systems Engineering Faculty Publications
The commercial fishing industry is frequently described as one of the most hazardous occupations in the United States. The objective, to maximize the catch, is routinely challenged by a variety of elements due to the environment, the vessel, the crew, and how they interact with each other. This study developed and evaluated a version of Wiegmann and Shappell’s (2003) Human Factors Analysis and Classification System (HFACS), specifically for commercial fishing industry vessels (HFACS-FV), using data from ten years of fatal fishing vessel accidents. For this study, the accident investigation information was converted into the HFACS-FV format by independent raters and …
Definition And Detection Of Hypervulnerabilities Using A Framework For Assessing Port Resilience,
2022
Old Dominion University
Definition And Detection Of Hypervulnerabilities Using A Framework For Assessing Port Resilience, Katherine Smith, Rafael Diaz, Yuzhong Shen, Francesco Longo
VMASC Publications
Long term plans for maritime ports are identifying investments that will increase their capacity while decreasing their environmental footprint and operating costs. These changes are leading to increases in complexity at a time when leaner practices are driving investments to become more strategic. As such, this work proposes a generalized definition that allows a system or entity to be classified as exceedingly vulnerable by comparing it to other entities. This definition is developed from a set of definitions gathered from disparate fields. From this definition grounded in theory, the initial rules for complex system implementation are developed and demonstrated on …
Investigating Changes In Trends Of Traffic Crashes Due To Covid-19 Pandemic In Florida’S Freeways,
2022
University of North Florida
Investigating Changes In Trends Of Traffic Crashes Due To Covid-19 Pandemic In Florida’S Freeways, Ntagwanko Kisabanzira
UNF Graduate Theses and Dissertations
The COVID-19 pandemic outbreak caused a shift in traffic patterns that have in turn influenced a change in traffic accident trends. Due to stay-at-home orders that were issued across the United States, transportation agencies reported low traffic demands on highways after the pandemic outbreak. Low traffic volumes are associated with relatively higher speeds that are linked to increased severity of crashes. Several states reported an increase in fatal crashes after the outbreak of the COVID-19 pandemic. This paper evaluates the traffic crash trends on three interstates in Florida (I-10, I-75, and I-95) and sheds light on what happened before, during, …
Analysis Of Shared Micromobility Related Crashes: Case Study Of Florida,
2022
University of North Florida
Analysis Of Shared Micromobility Related Crashes: Case Study Of Florida, Enock E. Mwambeleko
UNF Graduate Theses and Dissertations
United States cities have adopted shared micromobility systems to mitigate problems facing the transportation industry. The State of Florida has at least 13 established shared micromobility systems. Identifying the factors influencing the injury severity is critical for improving the safe operations of micromobility devices. This study investigates the leading factors affecting the injury severity for micromobility related crashes in Florida. The study investigates 463 crashes involving e-scooters or e-bikes between 2018 and 2022 in Florida, extracted by the Text-Mining approach from the SignalFour Analytics database. Analyses consisted of exploratory data analysis to discover trends and patterns. First, using the Pedestrian …
Crash Injury Severity Prediction With Artificial Neural Networks,
2021
New Jersey Institute of Technology
Crash Injury Severity Prediction With Artificial Neural Networks, Rima Abisaad
Dissertations
Motor vehicle crashes are one of our nation's most serious social, economic and health issues. They are the leading cause of death among children and young adults, killing approximately 1.35 million people each year. Providing a safe and efficient transportation system is the primary goal of transportation engineering and planning. To help reduce traffic fatalities and injuries on roadways, crash prediction models are used to forecast the injury severity of potential crashes and apply precautionary countermeasures accordingly. Most of these models are reactive as they use historical crash data to categorize crash-related factors. Recently, advancements have been made in developing …
Research On High-Rap Mixtures With Rejuvenator - Field Implementation,
2021
University of Nebraska-Lincoln
Research On High-Rap Mixtures With Rejuvenator - Field Implementation, Nitish R. Bastola, Mahdieh Khedmati, Hamzeh Haghshenas
Nebraska Department of Transportation: Research Reports
The use of Rejuvenating Agents (RAs), as Recycled Asphalt Pavement (RAP) modifiers, has been increasing over the past years. However, the field performance of asphalt mixtures containing high-RAP materials and modified with RAs has raised some concerns regarding the long-term performance of RAs. This study evaluated the laboratory and field performance of high-RAP mixtures with and without bio-oil RA. Three sets of plant-produced specimens were collected: 1) laboratory-compacted; 2) field-compacted and cored after paving; and 3) field-compacted and cored after one and two years. The Hamburg Wheel Tracking (HWT) test was used to evaluate the specimens' resistance to rutting and …
Estimation Of The Service Life Of Span Structures In Predicting The Durability Of Reinforced Concrete Bridges,
2021
Tashkent State transport University (Tashkent, Uzbekistan)
Estimation Of The Service Life Of Span Structures In Predicting The Durability Of Reinforced Concrete Bridges, Sh.B. Akhmedov, Kh. Almenov, Sh.Sh. Shojalilov, Sh.Sh. Safarov
The Scientific Journal of Vehicles and Roads
In recent years, on the roads of Uzbekistan and other countries, there has been a dangerous increase in various damages in the operated superstructures, caused by an increase in the service life and traffic intensity of vehicles and cargo tension.
Indicators Of Determining The Productivity Of Motor Graders Under Natural Conditions,
2021
Tashkent State transport University (Tashkent, Uzbekistan)
Indicators Of Determining The Productivity Of Motor Graders Under Natural Conditions, N.R. Aslonov, S.S. Yusubjonov, S.M. Mirkholiqov
The Scientific Journal of Vehicles and Roads
In the article, Motor Graders are self-propelled machines that level and shape the ground, and their equipment consists of a fully rotating blade overturner, located between the rear and front bridges of the pneumatic wheel drive.
Evaluation Of Reliability Indicators Of A Transformer Angular Displacement Transducer,
2021
Tashkent State transport University (Tashkent, Uzbekistan)
Evaluation Of Reliability Indicators Of A Transformer Angular Displacement Transducer, S.F. Amirov, M.S. Yakubov, N.R. Yuldashev
The Scientific Journal of Vehicles and Roads
Based on the analysis of statistical data on the state of transformer angular displacement transducers, the following calculations of probabilistic reliability indicators were performed: failure rate, mean time to failure; the probability of failure-free operation with a sufficiently long operation and gamma-percentage resource; confidence upper and lower bounds are determined, under the chosen conditions of significance, the calculated values satisfy Pearson's χ^2 criterion and therefore do not contradict the experimental data. By analyzing the selected levels of significance, the existence of exponential and normal laws in the laws of probability distribution was revealed.
Warranty And Post-Warranty Service For Vehicles,
2021
Jizzakh Polytechnic Institute (Jizzakh, Uzbekistan)
Warranty And Post-Warranty Service For Vehicles, U.A. Nurullayev, D.M. Zukhurova
The Scientific Journal of Vehicles and Roads
This article examines the characteristics of warranty and post-warranty service, the specifics of the work to identify problems and take into account the prospects of warranty and post-warranty service development, and compares warranty and post-warranty service before and after equipment purchase.
Processing Of The Results Of Comparisons Of Verification Installations Of The Same Level Of Accuracy,
2021
Uzbek Agency for Technical Regulation
Processing Of The Results Of Comparisons Of Verification Installations Of The Same Level Of Accuracy, A. Abdukayumov
The Scientific Journal of Vehicles and Roads
Methods of processing the results of comparisons of verification installations of the same level of accuracy on the example of frequency and time standards are considered. A comparative analysis of the methods used to compare the verification installations is performed. The conditions for confirming the metrological status (metrological characteristics) of the verification installations are noted. The method of comparison of verification installations of the same level of accuracy is proposed. The results of the study of the pairwise comparison of frequency and time standards, the difference of the arithmetic mean readings, estimates of the total variance, the arithmetic mean readings …
Method Of Determination Of Characteristics Of Crushed Rocks,
2021
Karakalpak State University of after Berdakh, (Tashkent, Uzbekistan)
Method Of Determination Of Characteristics Of Crushed Rocks, B.Yе. Kosymbetov
The Scientific Journal of Vehicles and Roads
The article describes the properties of heat resistance and frost resistance of a cone crusher when crushing rocks, and it is established that the transported stones have an abrasive effect on the cone crusher during crushing. Efficiency, of the crushing chamber, the composition of stones in the deposit, the percentage of their correct use of crushing power during construction work. The abrasive wear of the working bodies of the conical crushers was revealed.
