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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 6681 - 6700 of 36104 results
  • Fargo Moorhead 2015 Travel Demand Model Update
    Fargo Moorhead 2015 Travel Demand Model Update
    Motuba, Diomo ;
    Khan, Muhammad Asif
    2018-08-01 | PDF
    The Fargo Moorhead MPO Travel Demand Model (TDM) is updated every five years to replicate new data and the advancements in the state-of-the-art in transportation modeling methods and techniques. The current model update reflects 2015 base year data. The four-step TDM include trip generations, trip distributions, modal split and trip assignment. The ...
  • FullScale Laboratory Evaluation of Hybrid Composite Beams for Implementation in a Virginia Bridge
    Full-Scale Laboratory Evaluation of Hybrid Composite Beams for Implementation in a Virginia Bridge
    Moen, Cristopher D. ;
    Roberts-Wollmann, Carin L.
    2018-08-01 | PDF
    This research project studied a steel-reinforced concrete and fiber-reinforced polymer (FRP) structural element called the Hybrid-Composite Beam (HCB). The beam was used in a skewed simple span superstructure replacement project over the Tides Mill Stream in Colonial Beach, Virginia. For typical HCB construction, each beam is transported to site as ...
  • Synthesis Study Overview of Readily Available Culvert Inspection Technologies Summary
    Synthesis Study: Overview of Readily Available Culvert Inspection Technologies [Summary]
    Sinfield, Joseph V.
    2018-08-01 | PDF
    Culverts, conduits that facilitate passage of water through embankments or beneath roadways and other structures, represent important components of infrastructure systems, helping to drain, direct, or divert surface water and prevent the disruption of roadways by overtopping flows or erosion. According to the Indiana Department of Transportation, t ...
  • Material Constituents and Proportioning for RollerCompacted Concrete Mechanical Properties
    Material Constituents and Proportioning for Roller-Compacted Concrete Mechanical Properties
    LaHucik, Jeffrey R. ;
    Roesler, Jeffery R.
    2018-08-01 | PDF
    Roller-compacted concrete (RCC) is increasingly becoming an alternative pavement type because of its construction expediency, reductions in material and construction costs, sustainability benefits, and overall structural capacity. Current RCC pavement mix design procedures select mix constituents and proportions based on strength requirements, work ...
  • Kansas Department of Transportation Column Expert Shear Capacity of Circular Bridge Piers Confined with FiberReinforced Polymer FRP Wrapping
    Kansas Department of Transportation Column Expert: Shear Capacity of Circular Bridge Piers Confined with Fiber-Reinforced Polymer (FRP) Wrapping
    Abouelleil, AlaaEldin ;
    Rasheed, Hayder
    2018-08-01 | PDF
    The importance of the analysis of circular columns to accurately predict their ultimate confined (steel and fiber-reinforced polymer [FRP]) capacity under shear-flexure-axial force interaction domain is recognized in light of the extreme load event imposed by the current AASHTO LRFD Bridge Design Specifications. In this study, various procedures fo ...
    Supporting Files
  • Lateral Resistance of Pipe Piles Adjacent to a 15FT High MSE Wall
    Lateral Resistance of Pipe Piles Adjacent to a 15-FT High MSE Wall
    Rollins, Kyle M. ;
    Hatch, Cody K
    2018-08-01 | PDF
    A 15-foot tall Mechanically Stabilized Earth (MSE) retaining wall was constructed, and piles were driven at various distances behind the wall. Lateral pile load tests were conducted in the direction of the wall, and the performance of the pile, wall, and reinforcement were measured. The piles were 12.75-inch diameter pipe piles, and one half of the ...
  • Installation of Embedded Accelerometers in Precast Girders for Nibley Utah Bridge
    Installation of Embedded Accelerometers in Precast Girders for Nibley Utah Bridge
    Alder, Tyson Scott ;
    Halling, Marvin W.
    2018-08-01 | PDF
    Dynamic monitoring of structures is a method of detecting changes and damage to the structure. Vibration based monitoring has been used to detect damage in rotating machinery and is gaining popularity in the field of Structural Health Monitoring (SHM). Monitoring involves detecting changes in natural frequencies and changes in mode shapes. These ch ...
  • EndRegion Behavior and Shear Strength of Pretensioned Concrete Girders Employing 07in Diameter Strands
    End-Region Behavior and Shear Strength of Pretensioned Concrete Girders Employing 0.7-in. Diameter Strands
    Yousefpour, Hossein ;
    Kim, Hyun Su
    2018-08-01 | PDF
    This report provides an overview of a comprehensive research project at The University of Texas at Austin on the end-region serviceability and shear strength of Texas pretensioned bulb-tee girders (Tx-girders) that employ 0.7-in. diameter strands on a 2- by 2-in. grid. Seven full-scale specimens were fabricated and tested at Ferguson Structural Eng ...
  • Effect of Service Temperature on Joint Removal in Steel Bridges Research Brief
    Effect of Service Temperature on Joint Removal in Steel Bridges [Research Brief]
    Mahmoud, Hussam ;
    Atadero, Rebecca Anne
    2018-08-01 | PDF
    Bridge expansion joints are a particularly troublesome component of bridges and many departments of transportation (DOTs) are looking for a solution to deteriorating expansion joints on highway bridges. Bridge expansion joints create a break in the structural continuity of a bridge, allowing clogging gravels and corroding chlorides to enter.
  • Assessing the Feasibility of a Pedestrian and Bicycle Count Program in Virginia
    Assessing the Feasibility of a Pedestrian and Bicycle Count Program in Virginia
    Ohlms, Peter B. ;
    Dougald, Lance E
    2018-08-01 | PDF
    The study recommends that VDOT’s Transportation and Mobility Planning Division, with assistance from the Virginia Transportation Research Council, establish a pilot nonmotorized count program in one or more VDOT districts. Recommended program elements include purchasing and installing count equipment; identifying opportunities for training and outr ...
  • Evaluation of Roadway Lighting Practices
    Evaluation of Roadway Lighting Practices
    Howell, Brian ;
    Staats, William
    2018-08-01 | PDF
    Adequate roadway lighting allows better driver visibility during nighttime conditions. Research studies show that lighted roadways on average experience 28 percent fewer vehicles crashes on all roadway types. Most state DOTs have historically used High-Pressure Sodium (HPS) lights for their roadside lighting programs due to their wide availability ...
  • HVS Evaluation of Flexible Overlays on Composite Pavement
    HVS Evaluation of Flexible Overlays on Composite Pavement
    Mehta, Yusuf ;
    Ali, Ayman
    2018-08-01 | PDF
    This study focused on evaluating the field performance and life expectancy of various asphalt overlay treatments commonly used in New Jersey through full-scale accelerated pavement testing. Six 30-ft. long and 12-ft. wide full-scale, composite field sections were evaluated in this study. All six field sections contained a similar substructure (i.e. ...
  • Effect of Coupling on AWalls for Slope Stabilization
    Effect of Coupling on A-Walls for Slope Stabilization
    Boeckmann, Andrew ;
    Loehr, J. Erik
    2018-08-01 | PDF
    A-walls are retaining structures composed of regularly spaced deep foundation elements battered in opposing directions and connected through a grade beam to mitigate movements of a slope or embankment. Analysis of A-walls for slope stabilization applications is challenging because of complex interactions between deep foundation elements and moving ...
  • Recreating Livable Communities After Catastrophe Managing the Recovery from Japans Earthquake Tsunami and Nuclear Disaster of 2011
    Recreating Livable Communities After Catastrophe: Managing the Recovery from Japan’s Earthquake, Tsunami, and Nuclear Disaster of 2011
    Howitt, Arnold M.
    2018-07-31 | PDF
    The Great East Japan Earthquake and Tsunami of March 11, 2011, killed more than 20,000 people; devastated hundreds of kilometers of coastline in Northeast Japan, destroying homes, businesses, and infrastructure; triggered a nuclear crisis at the Fukushima Dai'ichi nuclear power station that led to long-term evacuation of all residents within a 30-k ...
  • Compatibility Testing of Supplemental Fall Protection Devices on NCDOT Bridges
    Compatibility Testing of Supplemental Fall Protection Devices on NCDOT Bridges
    Albert, Alex ;
    Zuluaga, Carlos M
    2018-07-31 | PDF
    Falls from bridge decks is a common safety issue among bridge maintenance and inspection workers. These workers traditionally rely on existing bridge guardrails for their protection against falls when performing on-the-deck work operations. However, a disproportionate number of the bridge guardrails do not provide sufficient protection based on the ...
  • Field Test of New Mobile System for the Collection of Crash and Citation Data in Nevada
    Field Test of New Mobile System for the Collection of Crash and Citation Data in Nevada
    Paz, Alexander ;
    Arteaga, Cristian
    2018-07-31 | PDF
    Alexander Paz, Ph.D., P.E; ORCID 0000-0002-1217-9808 Collection of accurate and consistent crash data plays a critical role in traffic safety studies for analysis and prevention of motor vehicle crashes. A desirable system for crash data collection needs to meet requirements such as accuracy, consistency, real-time reporting and minimization of exp ...
  • Research Management Database Business Analysis Final Report
    Research Management Database Business Analysis : Final Report
    Harrison, Francis D.
    2018-07-31 | PDF
    This report presents the results of an analysis of business needs for state department of transportation (DOT) research project and program management databases. DOTs currently track their research information in a variety of ways. While a few agencies have implemented full featured research program and project management database systems (RPMDs), ...
  • A Streamlined and Automated Procedure for Identifying NoPassing Zones Using Existing Resources Available to the Nevada Department of Transportation
    A Streamlined and Automated Procedure for Identifying No-Passing Zones Using Existing Resources Available to the Nevada Department of Transportation
    Santiago-Chaparro, Kelvin R. ;
    Chitturi, Madhav V.
    2018-07-30 | PDF
    Computer aided design (CAD) and geographic information systems (GIS) software should make the identification of no-passing zones possible with the click of a button. However, most highways were built before the use of CAD and GIS software was standard practice in highway design. As a result, the identification of highway segments that require no-pa ...
  • Assessing and Improving the Cognitive and Visual Driving Fitness of Older LongHaul Truck DriversPhase I
    Assessing and Improving the Cognitive and Visual Driving Fitness of Older Long-Haul Truck Drivers-Phase I
    Bhattacharya, Shelley B. ;
    Akinwuntan, Abiodun
    2018-07-30 | PDF
    Driving is a highly dynamic task that requires intact cognitive and visual skills to perform safely. Driving trucks loaded with hazardous materials requires even more careful planning and consideration to avoid unanticipated shifts in the center of gravity associated with sharp turns while speeding (slushing) or liquid surge associated with sharp b ...
  • UltraCompact and Rugged Electrochemical Sensor for Monitoring Toxic Metals in Natural Water Sources
    Ultra-Compact and Rugged Electrochemical Sensor for Monitoring Toxic Metals in Natural Water Sources
    Gholizadeh, Azam ;
    Francisco, Kelly
    2018-07-24 | PDF
    The goal of phase I of this project was to provide a novel technology capable of assessment of sediment contamination in New York harbor. NY harbor is a major transportation and trade hub. The harbor contains 3-5 million cubic yards of sediment which is dredged out of the navigation channels per year. The sediment contains contamination. There is a ...
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