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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 6101 - 6120 of 36049 results
  • CommunityAware Charging Station Network Design for Electrified Vehicles in Urban Areas Reducing Congestion Emissions Improving Accessibility and Promoting Walking Bicycling and use of Public Transportation PhaseII
    Community-Aware Charging Station Network Design for Electrified Vehicles in Urban Areas: Reducing Congestion, Emissions, Improving Accessibility, and Promoting Walking, Bicycling, and use of Public Transportation [Phase-II]
    Venkatachalam, Saravanan ;
    Chinnam, Ratna Babu
    2019-01-31 | PDF
    A major challenge for achieving large-scale adoption of EVs is an accessible infrastructure for the communities. The societal benefits of large-scale adoption of EVs cannot be realized without adequate deployment of publicly accessible charging stations due to mutual dependence of EV sales and public infrastructure deployment. Such infrastructure d ...
  • Evaluation of Mississippi Asphalt Mixture Thermal Properties for Pavement ME Design Phase I
    Evaluation of Mississippi Asphalt Mixture Thermal Properties for Pavement ME Design - Phase I
    Heitzman, Michael ;
    Gatiganti, Surendra C
    2019-01-28 | PDF
    This study compared AASHTOWare Pavement ME Design predicted performance of five Mississippi pavements using measured and default asphalt concrete thermal properties. Thermal conductivity and heat capacity values observed from literature vary over a wide range, but the measured values for the Mississippi pavements were similar to the default values. ...
  • Evaluation of Plus Grades of Performance Graded PG Asphalt Binder Phase II
    Evaluation of Plus Grades of Performance Graded (PG) Asphalt Binder (Phase II)
    Tarefder, Rafiqul A. ;
    Hasan, Md Amanul
    2019-01-26 | PDF
    The current Performance Grade (PG) system utilizes Dynamic Shear Rheometer (DSR), Bending Beam Rheometer (BBR), and Direct Tension (DT) tests to specify the grades of a binder. Some past studies reported that these tests apply very small amount of loadings those are within the Linear Viscoelastic (LVE) limits of the binder, where polymer network ma ...
  • Driver360: A Four-Dimensional Scanning System to Better Understand Drivers [supporting datasets]
    Baek, Stephen
    ORCID ICON IMG
    2019-01-24 | ZIP
    The main objective of this project was to construct a four-dimensional (4D = spatial + temporal) scanning system that can be installed in a driving simulator environment. The novel 4D scanning system, named Driver360, comprises 32 digital single lens reflex (DSLR) cameras and captures time-synchronized high-definition (HD) videos (≥ 1080p) of a sub ...
    Dataset Supporting Files
  • Strategic Outreach at the National Transportation Library
    Strategic Outreach at the National Transportation Library
    Strain, Samantha
    2019-01-15 | PDF
    Presented at the Transportation Research Board (TRB) Annual Meeting 2019, Poster Session 1552: Making Transportation Research Smart, Sustainable, and Equitable Through Libraries, Information, and Data. This poster will detail the development and implementation stages of a coordinated outreach plan at the National Transportation Library (NTL). By do ...
  • Lets Get Visual Metrics at the National Transportation Library
    Let’s Get Visual: Metrics at the National Transportation Library
    Farley, Laura M.
    ORCID ICON IMG
    2019-01-10 | PDF
    Presented at the Transportation Research Board (TRB) Annual Meeting 2019, Poster Session 1552: Making Transportation Research Smart, Sustainable, and Equitable Through Libraries, Information, and Data. This poster outlines the creation of metrics dashboards for the National Transportation Library (NTL) and the Bureau of Transportation Statistics (B ...
  • Using Driver State Detection in Automated Vehicles supporting dataset
    Using Driver State Detection in Automated Vehicles [supporting dataset]
    Gaspar, John ;
    Schwarz, Chris
    2019-01-10 | ZIP
    The next several years will bring a large increase in automated vehicle capabilities. High levels of automation will require bi-directional transfers of control between the driver and vehicle. These control transfer situations pose one of the greatest potential safety shortfalls. One specific issue that arises is that drivers may be unfit or ill-pr ...
  • Assessment of Jahn Permeable Mortar System in a Historic Bridge Abutment Application 20122017
    Assessment of Jahn Permeable Mortar System in a Historic Bridge Abutment Application [2012-2017]
    Anderson, Ian A.
    ORCID ICON IMG
    2019-01-07 | PDF
    Increasingly, the importance of historic preservation is competing with the requirements to enhance structural capacity of older unique structures. Preservation of the functional and aesthetic qualities limits potential change to meet the expanded needs of the traveling public. The Taftsville Covered Bridge in Woodstock, Vermont was deteriorating a ...
  • Quantifying the Performance of LowNoise Rumble Strips
    Quantifying the Performance of Low-Noise Rumble Strips
    Hurwitz, David S. ;
    Horne, Dylan R.
    2019-01-01 | PDF
    Shoulder or centerline rumble strips (RS) generate noise and vibration to alert drivers when they are departing the lane of travel. Although inexpensive to install, easy to maintain, and very long-lasting, RS are not installed on many roadway segments primarily due to noise concerns of nearby property owners. This study evaluated the feasibility of ...
  • Field Implementation of SuperWorkable FiberReinforced Concrete for Infrastructure Construction
    Field Implementation of Super-Workable Fiber-Reinforced Concrete for Infrastructure Construction
    Khayat, Kamal H. ;
    Abdelrazik, Ahmed
    2019-01-01 | PDF
    A fiber-reinforced super-workable concrete (FR-SWC) made with 0.5% micro-macro steel fibers and 5% CaO-based expansive agent was used for the new deck slab of Bridge A8509. The selected FR-SWC had a targeted slump flow of 20 in. at the casting location. Multiple trial batches were performed, in collaboration with the concrete supplier, to adjust th ...
  • Evaluating Corrections to Improve Ride Quality Based on Surface Profiles
    Evaluating Corrections to Improve Ride Quality Based on Surface Profiles
    Fernando, Emmanuel ;
    Hu, Sheng
    2019-01-01 | PDF
    This project follows up on the original development of the defect correction index (DCI) in the Texas Department of Transportation project 0-6610. As part of implementing the DCI methodology for evaluating defect corrections using surface profile measurements, this implementation project conducted additional bump rating panels to verify the origina ...
  • Vehicle Operating Speed on Urban Arterial Roadways
    Vehicle Operating Speed on Urban Arterial Roadways
    Fitzpatrick, Kay ;
    Das, Subasish
    2019-01-01 | PDF
    This research explored (1) the relationship between suburban vehicle operating speed and roadway characteristics, especially the presence of bicyclists and (2) whether crowdsourced speed data could be used to estimate the unconstrained speed for a location. Both vehicle volume per lane and bicycle volume were found to be influential in affecting av ...
  • The Impact of the Louisiana Rail Infrastructure A System Analysis and Plan Research Project Capsule 194SS
    The Impact of the Louisiana Rail Infrastructure: A System Analysis and Plan: Research Project Capsule [19–4SS]
    Stich, Bethany ;
    Rupnow, Tyson
    2019-01-01 | PDF
    The objectives of this research include an updated mapping of Louisiana rail infrastructure with associated freight flow data; updates to the state rail plan per the Passenger Rail Investment and Improvement Act (PRIIA); determining funding sources for rail; and quantifying the current economic impact of rail in Louisiana.
  • NETC 133 Phase II Development of Implementation Plan for Unified Quality Assurance QA Processes of Precast and Prestressed Concrete Elements PCEPSE for New England
    NETC 13-3 Phase II: Development of Implementation Plan for Unified Quality Assurance (QA) Processes of Precast and Prestressed Concrete Elements [PCE/PSE] for New England
    Dave, Eshan V. ;
    Sias, Jo E
    2019-01-01 | PDF
    The use of quality assurance (QA) systems in highway infrastructure is critical to ensure durable, safe, and economical transportation operations. These processes ensure that the desired level of quality is maintained throughout the manufacturing and construction processes. For regions such as New England, a significant cost savings can be realized ...
  • Last Mile Package Delivery via Rural Transit Project Summary and Pilot Outcomes
    Last Mile Package Delivery via Rural Transit: Project Summary and Pilot Outcomes
    Elgart, Zachary ;
    Miller, Kristi
    2019-01-01 | PDF
    Rural transit districts and intercity bus carriers are an important link within Texas’ multimodal transportation system. Without such service providers, many rural residents that are transit dependent would be forced to either relocate or find other means of transportation. Furthermore, with continued growth of business to consumer e-commerce deman ...
  • A Time and a Place for Every Rider Geographic and Temporal Changes in Bay Area Transit Ridership
    A Time and a Place for Every Rider?: Geographic and Temporal Changes in Bay Area Transit Ridership
    Wasserman, Jacob ;
    Taylor, Brian D.
    2019-01-01 | PDF
    Transit ridership is on the wrong track across America. Yet until 2016, the San Francisco Bay Area appeared immune to the ridership declines plaguing most other cities. However, in 2017, Bay Area ridership began to fall, both regionwide and on almost all major transit operators. But this decline has not occurred uniformly. Thus, to help explain why ...
  • Stabilized FullDepth Reclamation Increases Roadway Strength Technical Summary
    Stabilized Full-Depth Reclamation Increases Roadway Strength [Technical Summary]
    Jahren, Charles ;
    Kohlnhofer, Guy
    2019-01-01 | PDF
    Researchers found that stabilized full-depth reclamation has produced stronger roads for commercial loads in Minnesota, and the method shows promise for uses in rural agricultural areas. How much greater the strength gained with each stabilizing agent is better understood, though not conclusively.
  • Development of an Augmented Reality Environment for Connected and Automated Vehicle Testing
    Development of an Augmented Reality Environment for Connected and Automated Vehicle Testing
    Liu, Henry X. ;
    Feng, Yiheng
    2019-01-01 | PDF
    Currently closed Connected and Automated (CAV) testing facilities, such as Mcity, merely provide empty roadways, in which test CAVs can only interact with each other and the infrastructure (e.g. traffic signals). However, a complete testing environment should also include background traffic to interact with the test CAVs. Involving real vehicles as ...
  • Requirements for Use of FieldCast Proprietary UltraHighPerformance Concrete in Florida Structural Applications
    Requirements for Use of Field-Cast, Proprietary Ultra-High-Performance Concrete in Florida Structural Applications
    Riding, Kyle A ;
    Ferraro, Christopher C.
    2019-01-01 | PDF
    Ultra-high-performance concrete (UHPC) is a groundbreaking cementitious material that has the potential for innovative structural use that makes lighter, more durable, and overall lower cost structures. Very low water-to-cementitious material ratios and high dosages of fibers are used to give UHPC high compressive strength, high tensile strength, a ...
  • Prevention of Backing Fatalities in Construction Work Zones Project Summary
    Prevention of Backing Fatalities in Construction Work Zones [Project Summary]
    Fan, Wei ;
    Carroll, Clayton
    2019-01-01 | PDF
    Construction, repair, and maintenance work zones are hazardous environments because of the dangerous combination of pedestrian workers and large trucks, bulldozers, rollers, and other moving machinery. All the workers are exposed to moving traffic near the work zone, with the risk of errant vehicles entering the work zone area.
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