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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 7301 - 7320 of 36114 results
  • Connected Vehicle Infrastructure Deployment and Funding Overview
    Connected Vehicle Infrastructure : Deployment and Funding Overview
    Huntsman, Brett
    2018-01-01 | PDF
    This report reviews existing and proposed legislation relevant to connected vehicle infrastructure (CVI) implementation, identifies existing funding mechanisms for CVI implementation, reviews CVI pilot programs and case studies, and provides an overview of CVI technology. CVI technology is one component of the broader category of Intelligent Transp ...
  • The Potential Impacts of the Panama Canal Expansion on Texas Ports Final Report
    The Potential Impacts of the Panama Canal Expansion on Texas Ports, Final Report
    Prozzi, Jolanda ;
    Overmyer, Sarah
    2018-01-01 | PDF
    The Panama Canal is a set of locks that allows vessels to pass through the Isthmus of Panama. When the Panama Canal opened in 1914, it provided the first ever direct water passage between the Atlantic and Pacific Oceans. The new all-water global shipping route allowed for shorter maritime travel distances between several key markets and significant ...
  • Multiscale Fatigue Damage Life Assessment of Railroad Wheels
    Multi-scale Fatigue Damage Life Assessment of Railroad Wheels
    Allen, David H.
    2018-01-01 | PDF
    This study focused on the presence of a crack in the railway wheel’s subsurface and how it affects the wheel’s fatigue life. A 3-D FE-model was constructed to simulate the stress/strain fields that take place under the rolling contact of railway wheels on rails. To achieve computational efficiency and accuracy, a multiscale technique was employed. ...
  • Mechanisms Involved in the Removal of Heavy Metals from Stormwater via Lignocellulosic Filtration Media
    Mechanisms Involved in the Removal of Heavy Metals from Stormwater via Lignocellulosic Filtration Media
    Chowdhury, Indranil ;
    Tian, Yuhao
    2018-01-01 | PDF
    This report aims to supplement our previous report (Yonge et al. 2016; WA-RD 816.3) that assessed copper and zinc adsorption to lignocellulosic filtration media using laboratory tests and field-scale column tests for urban stormwater remediation. The current project extends the species of wood materials that were investigated in the earlier study. ...
  • Develop Strong and Serviceable Details for Precast Prestressed Concrete Bent Cap Standards That Can Be Implemented on Everyday Bridge Construction Projects Project Summary
    Develop Strong and Serviceable Details for Precast, Prestressed Concrete Bent Cap Standards That Can Be Implemented on Everyday Bridge Construction Projects, Project Summary
    Birely, Anna C. ;
    Mander, John B.
    2018-01-01 | PDF
    Pretensioned bent caps are an attractive substructure component because they offer contractors an option for fabrication by prestressing plants and can be used to eliminate or reduce cracks. Two sets of design recommendations were developed to enable implementation of pretensioned caps. The first allows for conversion of RC designs to pretensioned ...
  • Longterm Stabilization of Disturbed Slopes Resulting from Construction Operations
    Long-term Stabilization of Disturbed Slopes Resulting from Construction Operations
    Perkins, Robert A. ;
    Bennett, F. Lawrence
    2018-01-01 | PDF
    Highway construction disturbs soil, which must be stabilized to prevent migration of soil particles into water bodies. Stabilization is enforced by law, regulation, and a permit system. Stabilization is most efficiently attained by reestablishment of vegetation, and permits sometimes specify this method of stabilization. Revegetation is difficult i ...
  • Implementation of Pesticide Applicator Certification Schools and Continuing Education Workshops
    Implementation of Pesticide Applicator Certification Schools and Continuing Education Workshops
    Martin, Dennis
    2018-01-01 | PDF
    The herbicide applicator training program of the Oklahoma Department of Transportation (ODOT) consists of initial pesticide applicator training schools, certification testing, sprayer calibration workshops and on-going yearly continuing education sessions. Four pesticide applicator certification schools were conducted by Oklahoma State University ( ...
  • Developing Guidelines for TwoDimensional Model Review and Acceptance Final Report
    Developing Guidelines for Two-Dimensional Model Review and Acceptance: Final Report
    Homan, Joel ;
    Toniolo, Horacio
    2018-01-01 | PDF
    Two independent modelers ran two hydraulic models, SRH-2D and HEC-RAS 2D. The models were applied to the Lakina River (MP 44 McCarthy Road) and to Quartz Creek (MP 0.7 Quartz Creek Road), which approximately represent straight and bend flow conditions, respectively. We compared the results, including water depth, depth averaged velocity, and bed sh ...
  • Formwork Pressure Measurements and Prediction of High Performance Concrete with Adapted Rheology
    Formwork Pressure Measurements and Prediction of High Performance Concrete with Adapted Rheology
    Lange, David A.
    2018-01-01 | PDF
    This study was conducted under RE-CAST Project 1B “Formwork Pressure Measurements and Prediction of High Performance Concrete with Adapted Rheology.” High performance concrete with adapted rheology (HPC-AR) is a term for a wide range of concrete materials for which flow and workability is a major design objective. HPC-AR includes self-consolidating ...
    Supporting Files
  • Implementation Plan for Alternatives to Nuclear Density Testing
    Implementation Plan for Alternatives to Nuclear Density Testing
    Mehta, Yusuf ;
    Ali, Ayman
    2018-01-01 | PDF
    The primary goal of this study was to develop an implementation plan for the Dynamic Cone Penetrometer (DCP) device and specifications. In an effort to reach this goal, two field demonstrations of the DCP were conducted for contractors and NJDOT personnel on active NJDOT job sites. Each job site also conducted compaction quality testing using the n ...
  • Automated Chain Drag Testing
    Automated Chain Drag Testing
    Sun, Hongbin ;
    Zhu, Jinying
    2018-01-01 | PDF
    This report describes research work to develop an automated acoustic scanning system for rapid concrete bridge deck evaluation. The system consists of multiple channels of ball-chain impact sources and MEMs microphones for continuous acoustic wave excitation and non-contact acoustic sensing. A high precision RTK GPS with centimeter resolution provi ...
  • Classification of Wind Farm Turbulence and Its Effects on General Aviation Aircraft and Airports
    Classification of Wind Farm Turbulence and Its Effects on General Aviation Aircraft and Airports
    Zheng, Zhongquan Charlie ;
    Wu, Huixuan
    2018-01-01 | PDF
    Wind turbines located on sites known as wind farms have become popular in the United States and elsewhere because they may be able to reduce, if not replace, the use of fossil fuels for energy production. The development of wind farms has been particularly rapid in recent years along the so-called "wind corridors" in such areas as Kansas, Nebraska, ...
  • Surface Chloride Levels in Colorado Structural Concrete
    Surface Chloride Levels in Colorado Structural Concrete
    Xi, Yunping ;
    Jing, Yuxiang
    2018-01-01 | PDF
    This project focused on the chloride-induced corrosion of reinforcing steel in structural concrete. The primary goal of this project is to analyze the surface chloride concentration level of the concrete bridge decks throughout Colorado. The study indicates three factors that can affect chloride concentration levels in bridge decks: age of the conc ...
  • Bridge scour conference shares knowledge and innovations Tech Transfer Spotlight
    Bridge scour conference shares knowledge and innovations : Tech Transfer Spotlight
    Brooks, Colin
    2018-01-01 | PDF
    The National Cooperative Highway Research Program’s Domestic Scan (NCHRP Project 20-68A) on bridge scour risk management brought more than 30 national bridge scour experts together for a week in July 2016 to examine ways to prevent and remediate bridge scour. To help disseminate these experts’ knowledge and innovations to professionals in Michigan, ...
  • Classification of Wind Farm Turbulence and Its Effects on General Aviation Aircraft and Airports Technical Summary
    Classification of Wind Farm Turbulence and Its Effects on General Aviation Aircraft and Airports : Technical Summary
    Zheng, Zhongquan Charlie ;
    Wu, Huixuan
    2018-01-01 | PDF
    Wind turbines located on sites known as wind farms have become popular in the United States and elsewhere because they may be able to reduce, if not replace, the use of fossil fuels for energy production. The development of wind farms has been particularly rapid in recent years along the so-called "wind corridors" in such areas as Kansas, Nebraska, ...
  • A Mechanistic Design Approach for Graphite Nanoplatelet GNP Reinforced Asphalt Mixtures for LowTemperature Applications
    A Mechanistic Design Approach for Graphite Nanoplatelet (GNP) Reinforced Asphalt Mixtures for Low-Temperature Applications
    Marasteanu, Mihai ;
    Le, Jia-Liang
    2018-01-01 | PDF
    This report explores the application of a discrete computational model for predicting the fracture behavior of asphalt mixtures at low temperatures based on the results of simple laboratory experiments. In this discrete element model, coarse aggregates are explicitly represented by spheres, and these spheres are connected by bonds representing the ...
  • Modeling the Impacts of Changes in Freight Demand Infrastructure Improvements and Policy Measures on a Metropolitan Region
    Modeling the Impacts of Changes in Freight Demand, Infrastructure Improvements and Policy Measures on a Metropolitan Region
    Spasovic, Laura ;
    Zhang, Wen
    2018-01-01 | PDF
    In this research, a policy framework was developed and used as a tool to determine the impacts of change in truck traffic on a regional level as a result of policy change. To achieve the objective, three demand models were used in the framework which is built on the principle of behavioral route choice and mode-choice assignment problem. The proble ...
  • Method for Predicting Thermal Buckling in Rails
    Method for Predicting Thermal Buckling in Rails
    Allen, David H. ;
    Fry, Gary T.
    2018-01-01 | PDF
    A method is proposed herein for predicting the onset of thermal buckling in rails in such a way as to provide a means of avoiding this type of potentially devastating failure. The method consists of the development of a thermomechanical model of rail buckling, together with the construction of an on-the-fly experimental apparatus that is capable of ...
  • Bridge Rails and Barriers A Reference Guide for Transportation Projects in the Coastal Zone
    Bridge Rails and Barriers: A Reference Guide for Transportation Projects in the Coastal Zone
    California. Department of Transportation
    2018-01-01 | PDF
    This guide has been prepared as a tool to help stakeholders and participants in bridge and railing design to better understand options available for potentially successful application in future projects. Hopefully, this information will help to streamline the processes of rail selection and coastal development permitting. Part II, Rails and Barrier ...
  • Review of Literature and Maintenance Practices at State Transportation Agencies
    Review of Literature and Maintenance Practices at State Transportation Agencies
    Gibson, Bryan ;
    Albright, Nancy
    2018-01-01 | PDF
    This report includes: (1) an overview of relevant literature related to maintenance scheduling, prioritization, and methodologies; (2) Kentucky Transportation Cabinet (KYTC) maintenance background and current approach including information from the Field Operations Guide Manual, Maintenance Rating Program, and Maintenance Guidance Manual; and (3) R ...
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