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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 5721 - 5740 of 36054 results
  • An Examination of Commercial Vehicle Access to Residential Buildings in New York City
    An Examination of Commercial Vehicle Access to Residential Buildings in New York City
    Chen, Quanquan ;
    Conway, Alison J.
    2019-06-01 | PDF
    Recent growth in ecommerce has quickly impacted the distribution of parcel deliveries in urban areas, with residential deliveries accounting for a rapidly growing share of freight movement. Through field observation and development of a simulation model, this study aims to investigate the characteristics of parcel delivery activity in a heavily res ...
  • Traffic Safety Facts 2017 Data RuralUrban Comparison of Traffic Fatalities
    Traffic Safety Facts 2017 Data: Rural/Urban Comparison of Traffic Fatalities
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2019-06-01 | PDF
    For this fact sheet, rural and urban boundaries are determined by the State highway departments and approved by the Federal Highway Administration. The State highway departments use the boundaries decided by the Census Bureau. In this fact sheet for 2017, the information about rural and urban traffic fatalities is presented as follows: Overview; En ...
  • Evaluation of Adaptive Signal Control TechnologyFinal Report
    Evaluation of Adaptive Signal Control Technology—Final Report
    Benekohal, Rahim F. ;
    Jeon, Hongjae
    2019-06-01 | PDF
    This report presents the results of field evaluation of an adaptive signal‐control technology (ASCT) system—SynchroGreen—deployed on the Neil Street corridor in Champaign, Illinois. The Illinois Department of Transportation (IDOT) was interested in field evaluation of an ASCT on a corridor, in terms of traffic safety and operational efficiency. Syn ...
  • Development of Depreciation Models Utilizing the NBI Condition Ratings Over 25 Years
    Development of Depreciation Models Utilizing the NBI Condition Ratings Over 25 Years
    Geum Chorzepa, Mi ;
    Oyegbile, Brian
    2019-06-01 | PDF
    The Georgia Department of Transportation maintains an inventory of approximately 15,000 bridges and culverts across the state. These bridges and culverts have been inspected biennially since 1992, yielding over 25 years of bridge condition rating (CR) data from the National Bridge Inventory (NBI). Condition ratings are assigned on a discrete 0-9 sc ...
  • Revised THOR 50th Percentile Male Dummy Seating Procedure
    Revised THOR 50th Percentile Male Dummy Seating Procedure
    Louden, Allison E.
    2019-06-01 | PDF
    NHTSA developed a seating procedure for the THOR 50th percentile male dummy (THOR-50M). The original procedure was released with a December 2015 Request for Comments (RFC), and some updates were presented at a public meeting at NHTSA’s Vehicle Research and Test Center in August 2016. This report discusses the changes to the seating procedure since ...
  • Direct Determination of Cement Composition by Xray Diffraction
    Direct Determination of Cement Composition by X-ray Diffraction
    Mukhopadhyay, Anol K. ;
    Ganesh, Ramnath Mylapore
    2019-06-01 | PDF
    This project established protocols and specifications for the direct determination of cement composition by Quantitative X-ray Diffraction (QXRD). The main objectives of this research were: 1) developing protocols for routinely performing QXRD testing, 2) testing the effectiveness of the protocols using commercial cement samples, and 3) documenting ...
  • Prestress Losses and Development of Shortterm Data Acquisition System for Bridge Monitoring
    Prestress Losses and Development of Short-term Data Acquisition System for Bridge Monitoring
    Pace, Justin M ;
    Barr, Paul J.
    2019-06-01 | PDF
    When a vehicle drives over a bridge, each bridge girder carries a portion of the vehicle's weight. This load causes strain in the bottom of the bridge girders. However, depending on where the vehicle is located on the bridge, some bridge girders carry a higher percentage of the vehicle's load. This study investigated the amount of strain typical ve ...
  • More Freight Vehicle Crashes on City Streets in Residential Areas Why and to What Extent A Case Study in DallasFort Worth TX
    More Freight Vehicle Crashes on City Streets in Residential Areas: Why and to What Extent? A Case Study in Dallas-Fort Worth, TX
    Kang, Sanggyun ;
    Khan, Muhammad Arif
    2019-06-01 | PDF
    Over the last decade, globalized supply chains, restructured logistics and freight transportation practices, and exploding online shopping have influenced how goods are produced, transported, stored, and sold. All these changes have resulted in substantial shifts in the spatial distribution of freight activity, as well as vehicles crashes that invo ...
  • Scenarios and Justification for Automated Vehicle Demonstration in Rural Minnesota
    Scenarios and Justification for Automated Vehicle Demonstration in Rural Minnesota
    Douma, Frank ;
    Petersen, Erin
    2019-06-01 | PDF
    Automated vehicles (AVs) have the potential to disrupt the current transportation system and culture. While experts debate the exact timeline, the question is likely a matter of when, not if. Therefore, communities of all kinds need to prepare for this future. Small urban and rural communities, in particular, could benefit from the development of t ...
  • Evaluation of Adaptive Signal Control TechnologySystems Engineering SE Document and ASCTSelection Method
    Evaluation of Adaptive Signal Control Technology—Systems Engineering (SE) Document and ASCT‐Selection Method
    Benekohal, Rahim F. ;
    Armstrong, K. M.
    2019-06-01 | PDF
    Adaptive signal control technology (ASCT) systems are to respond (adapt) to real-time traffic demand and patterns to provide more efficient and safer operation at signalized intersections. The Illinois Department of Transportation (IDOT) wanted to conduct a field evaluation of an ASCT system by deploying one on a corridor and assessing its performa ...
  • Development of a Traffic Map Evaluation Tool for TMC Applications
    Development of a Traffic Map Evaluation Tool for TMC Applications
    Stevanovic, Aleksandar ;
    Mitrovic, Nikola
    2019-06-01 | PDF
    Traffic congestion is an inevitable part of urban transportation networks and its mitigation requires expertise (of Traffic Management Center operators) and proper detection coverage of the network. The traffic information is often collected with high temporal and spatial resolutions and retrieved from multiple sources. This project focuses on retr ...
  • RealTime Integration of ArrowGenerated Work Zone Activity Data into Traveler Information Systems
    Real-Time Integration of Arrow-Generated Work Zone Activity Data into Traveler Information Systems
    United States. Department of Transportation. Federal Highway Administration. Office of Operations
    2019-06-01 | PDF
    The Minnesota Department of Transportation (MnDOT), as part of the ENTERPRISE Pooled Fund Study, is implementing a Smarter Work Zone Technology Application that utilizes real-time work zone activity information to improve situational awareness for operators to monitor traffic operations and automatically create lane closure notifications for the pu ...
  • MASH TL4 Testing and Evaluation of FreeStanding Single Slope Concrete Barrier with CrossBolt Connection
    MASH TL-4 Testing and Evaluation of Free-Standing Single Slope Concrete Barrier with Cross-Bolt Connection
    Sheikh, Nauman M. ;
    Bligh, Roger P.
    2019-06-01 | PDF
    The purpose of the testing reported herein was to assess the performance of the free-standing single slope concrete barrier (SSCB) with cross-bolt connections according to the safety-performance evaluation guidelines included in American Association of State Highway and Transportation Officials’ Manual for Assessing Safety Hardware (MASH) for Test ...
  • Restricted Crossings on Rural Highways
    Restricted Crossings on Rural Highways
    Sangster, John ;
    Adams, Tim
    2019-06-01 | PDF
    This study examines the potential for replacing the standard intersection design at two-way stop control (TWSC) and all-way stop control (AWSC) intersections along rural highways with a roundabout or a restricted crossing u-turn (RCUT) facility. The geometry of the RCUT design prohibits left and through movements from the side road, and provides a ...
  • Investigation of Design Alternatives for the Subbase of Concrete Pavements
    Investigation of Design Alternatives for the Subbase of Concrete Pavements
    Getchell, Amy ;
    Sabogal, Luis Garzon
    2019-06-01 | PDF
    In all pavement structures, one or more support layers separate the pavement from the subgrade. In addition to offering structural support, these layers have several important functions, which include: providing a stable and uniform construction platform, facilitating drainage, mitigating pumping of the subgrade fines, and protecting the pavement f ...
  • Strength Envelopes of Florida Rock and Intermediate Geomaterials Summary
    Strength Envelopes of Florida Rock and Intermediate Geomaterials [Summary]
    McVay, Michael
    2019-06-01 | PDF
    University of Florida researchers were tasked with testing cores from locations across the state to characterize the material properties, develop a strength envelope, and provide bearing capacity equations for shallow foundation design.
  • Integration of Unmanned Aircraft Systems to Increase Safety and Decrease Costs of Transportation Projects and Related Tasks
    Integration of Unmanned Aircraft Systems to Increase Safety and Decrease Costs of Transportation Projects and Related Tasks
    O’Neil-Dunne, Jarlath P M ;
    Estabrook, Emma
    2019-06-01 | PDF
    The use of Unmanned Aircraft Systems (UAS) has the potential to reduce costs and increase safety for transportation operations ranging from bridge inspections to construction monitoring. The overall objective of this project focused on evaluating UAS technology for a broad range of case studies relating to the specific needs of the New Hampshire De ...
  • Predictive Computer Program for Proactive Demolition Planning
    Predictive Computer Program for Proactive Demolition Planning
    Bakhtiari, Ali ;
    Lee, Seung Jae
    2019-05-31 | PDF
    Bridges represent a significant subpopulation of our civil infrastructure. Majority of them are deteriorating fast and in need of replacement or rehabilitation. The first step of those replacement/rehabilitation projects is typically to either entirely or partly demolish the existing structure. Therefore, proactive planning for controlled demolitio ...
  • Accelerated Innovation Deployment AID Demonstration Project Living Bridge Creating a Benchmark for Bridge Monitoring
    Accelerated Innovation Deployment (AID) Demonstration Project: Living Bridge: Creating a Benchmark for Bridge Monitoring
    United States. Department of Transportation. Federal Highway Administration
    2019-05-31 | PDF
    This project included the “Living Bridge” group efforts to create a benchmark example of a self-diagnosing, self-reporting, “smart infrastructure” at the Memorial Bridge (Portsmouth, NH, and Kittery, ME) to further advance a National Science Foundation (NSF) funded project, the “Living Bridge Project (LBP)”, seeking to promote infrastructure sustai ...
  • Highway Construction Sediment Basins Assessment of Water Quality Treatment Performance
    Highway Construction Sediment Basins: Assessment of Water Quality Treatment Performance
    Schwartz, John S ;
    Smith, Payton M.
    2019-05-31 | PDF
    Sediment basins with outlet orifice skimmers are one of forty erosion prevention and sediment control (EPSC) devices that the Tennessee Department of Transportation (TDOT) utilizes to meet regulatory runoff quality permitting requirements at their highway construction sites. Regulations set in place by the US Environmental Protection Agency (US EPA ...
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