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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 3161 - 3180 of 36873 results
  • Evaluating the Performance of Inverted Pavements in Tennessee
    Evaluating the Performance of Inverted Pavements in Tennessee
    Jiang, Xi ;
    Huang, Baoshan
    2022-05-01 | PDF
    Inverted pavement is an unconventional type of flexible pavement structure. In this pavement structure, an unbound aggregate base (UAB) with a low initial modulus is sandwiched (layered) between two stiffer layers, a thinner asphalt concrete layer (AC) and a cement-treated base layer (CTB). This type of pavement structure has been a potential alter ...
  • Winter Pothole Treatments for Local Roads
    Winter Pothole Treatments for Local Roads
    Nazzal, Munir D. ;
    Talha, Sk. Abu
    2022-05-01 | PDF
    This report summarizes the results of a study was conducted to identify efficient and cost-effective pothole patching treatments and provide recommendation for optimal methods and materials that various Local Public Agencies (LPAs) can use to enhance the performance and longevity of pothole patches installed during the winter season. To achieve the ...
  • RealTime Traffic Signal System Performance Measurement Phase II Data and Functionality Enhancement Large Scale Deployment Connected and Autonomous Vehicles Integration Final Report Volume II
    Real-Time Traffic Signal System Performance Measurement Phase II: Data and Functionality Enhancement, Large Scale Deployment, Connected and Autonomous Vehicles Integration Final Report Volume II
    Jin, Peter J. ;
    Zhang, Tianya
    2022-05-01 | PDF
    Volume II provides supplementary material for Volume I. The content includes: the operational manual for ATSPM (Automated Traffic Signal Performance Measures) metadata processing and archiving program, training modules and field test data for CV (Connected Vehicle) OBU (On-Board Unit) and RSU (Roadside Unit), and details of the meeting discussion a ...
  • Design and Performance of OpenGraded Friction Course OGFC Mixtures Containing Epoxy Asphalt Summary
    Design and Performance of Open-Graded Friction Course (OGFC) Mixtures Containing Epoxy Asphalt [Summary]
    West, Randy
    2022-05-01 | PDF
    Auburn Research and Technology Foundation researchers investigated the use of epoxy-modified asphalt (EMA) to improve the long-term durability and life span of OGFC mixtures on Florida roadways.
  • Creating a Resilient Port System in Texas Assessing and Mitigating Extreme Weather Events Final Report
    Creating a Resilient Port System in Texas: Assessing and Mitigating Extreme Weather Events – Final Report
    Bathgate, Kyle ;
    Sun, Jingran
    2022-05-01 | PDF
    Extreme weather events may disrupt port and coastal freight operations, resulting in direct and indirect economic losses to ports, supporting infrastructure, and reliant industry systems. Therefore, understanding the existing resilience capacity of the Texas port system to extreme weather events is necessary. To accomplish this, the weather hazards ...
  • Linking Bad Credentials to Safety Issues
    Linking Bad Credentials to Safety Issues
    Martin, Andrew ;
    Koo, Jeeyen
    2022-05-01 | PDF
    This study assesses (1) the effectiveness of the Kentucky Automated Truck Screening (KATS) system, (2) the relationship between credential and vehicle safety violations, (3) the relationship between credential and driver safety violations, and (4) the relationship between credential violations and crashes. The KATS system, which is installed at wei ...
  • Feasibility Analysis of Ultra High Performance Concrete for Prestressed Concrete Bridge Applications Phase IV
    Feasibility Analysis of Ultra High Performance Concrete for Prestressed Concrete Bridge Applications - Phase IV
    Weldon, Brad D. ;
    Jáuregui, David V.
    2022-05-01 | PDF
    Phase IV was a continuation of a project to implement Ultra High Performance Concrete (UHPC) in precast, prestressed bridge girders in New Mexico. In Phase I of this research, case studies were conducted to investigate the advantages of implementing UHPC in bridge superstructure design. Due to the benefits that UHPC offers, this feasibility study r ...
  • RealTime Signal Performance Measurement Phase Data and Functionality Enhancement Large Scale Deployment Connected and Autonomous Vehicles Integration Technical Brief
    Real-Time Signal Performance Measurement Phase Ⅱ: Data and Functionality Enhancement, Large Scale Deployment, Connected and Autonomous Vehicles Integration [Technical Brief]
    Jin, Peter J. ;
    Brennan Jr., Thomas M.
    2022-05-01 | PDF
    The primary objective of the second phase of this project is to develop and deploy a significantly enhanced version of the original toolbox, NJDOT ATSPM 2.0, along with a pilot study on the integration of adaptive signal controllers with CAV technologies. NJDOT arterial management operators can then use the ATSPM platform to generate key performanc ...
  • Local Calibration of CValues for Common Idaho Soil Types for Use in MechanisticEmpirical Pavement Design
    Local Calibration of “C-Values” for Common Idaho Soil Types for Use in Mechanistic-Empirical Pavement Design
    Santi, Michael J ;
    Crawforth, Stanly G
    2022-05-01 | PDF
    AASHTOWare Pavement ME software has been adopted by the Idaho Transportation Department (ITD) for Mechanic-Empirical analysis of pavement structures. AASHTOWare analyses are platformed on the laboratory resilient modulus test, AASHTO T 307. The test is appropriate for evaluating “undisturbed” subgrade samples and reconstituted materials. Laboratory ...
  • A Synthesis on Data Mining Methods and Applications for Automated Fare Collection AFC Data Summary
    A Synthesis on Data Mining Methods and Applications for Automated Fare Collection (AFC) Data [Summary]
    Jin, Xia
    ORCID ICON IMG
    2022-05-01 | PDF
    Florida International University researchers performed a comprehensive review of the literature to provide an overview of existing knowledge and experience in utilizing AFC data, as found in practice and in research.
  • Identifying and Prioritizing Target Regions to Conduct Outreach Activities to Improve Safety and Mobility of Aging Population Summary
    Identifying and Prioritizing Target Regions to Conduct Outreach Activities to Improve Safety and Mobility of Aging Population [Summary]
    Alluri, Priyanka
    2022-05-01 | PDF
    Florida International University developed a Geographic Information System-based approach to identify and prioritize target regions to conduct outreach activities that will help improve the safety and mobility of Florida’s aging population.
  • Flexural Capacity of Concrete Elements with Unbonded and Bonded Prestressing
    Flexural Capacity of Concrete Elements with Unbonded and Bonded Prestressing
    Consolazio, Gary R. ;
    Hamilton, H. R. (Trey)
    2022-05-01 | PDF
    Prestressed concrete is widely used in bridge construction and is considered a cost-effective and efficient method of construction. However, durability issues have arisen which have been attributed to poor grouting practice or material performance. To improve durability and facilitate replacement of tendons, bridge construction projects in Florida ...
  • Evaluation of Lightweight Aggregate for Internal Curing on Concrete Pavement in Kansas Technical Summary
    Evaluation of Lightweight Aggregate for Internal Curing on Concrete Pavement in Kansas [Technical Summary]
    Jenkins, Andrew ;
    Meggers, David A.
    2022-05-01 | PDF
    The purpose of this project and the Internally Cured Concrete (ICC) test section was to evaluate the benefits obtained through internal curing using pre-saturated Lightweight Aggregate (LWA). The pavements will be evaluated to determine if there is a significant reduction in permanent panel warping. Permanent panel warping, caused by excessive mois ...
  • Florida Index for Transportation A System of Systems Approach to Understanding the Changing Nature of Transportation Summary
    Florida Index for Transportation: A System of Systems Approach to Understanding the Changing Nature of Transportation [Summary]
    Choi, Juyeong
    2022-05-01 | PDF
    For over 100 years, transportation has increased in scale and complexity at all levels, and that trend continues. People and freight move through networks that include public and private transportation and that accommodate and connect pedestrians, bicycles, automobiles, and trucks with planes, trains, and ships. The planning, funding, and managemen ...
  • Emerging Transportation Innovations Promises and Pitfalls
    Emerging Transportation Innovations: Promises and Pitfalls
    Labi, Samuel ;
    Sinha, Kumares C.
    2022-05-01 | PDF
    Rapid growth in information and communication technologies has spawned a number of major innovations in transportation area, including automation and connectivity. At the same time, the advancement in battery technology has accelerated the electrification of transportation vehicle propulsion. This paper, focusing on highway-oriented surface transpo ...
  • Accelerated Corrosion Testing of Grouts for PostTensioning Steel Strand Summary
    Accelerated Corrosion Testing of Grouts for Post-Tensioning Steel Strand [Summary]
    Florida. Department of Transportation
    2022-05-01 | PDF
    Florida International University researchers assessed modifications of standard grout testing methods using purposely deficient grout to connect deficiencies with corrosion potential and to identify testing protocols that can help mitigate corrosion potential.
  • 100 Recycled Mixtures Using Hot InPlace Recycling HIR and Cold InPlace Recycling CIR
    100% Recycled Mixtures Using Hot In-Place Recycling (HIR) and Cold In-Place Recycling (CIR)
    Huang, Baoshan ;
    Ma, Yuetan
    2022-05-01 | PDF
    The increasing costs of asphalt binder and aggregates have put much pressure on the highway maintenance budgets. Pavement managers are seeking alternative cost-effective approaches to rehabilitate the roads. In-place recycling techniques, including hot in-place recycling (HIR) and cold in-place recycling (CIR), encouraged consuming 100% RAP from th ...
  • Developing a Plan for Using Unmanned Aerial Vehicles for Traffic Operations Applications in Virginia
    Developing a Plan for Using Unmanned Aerial Vehicles for Traffic Operations Applications in Virginia
    Alden, Andrew S. ;
    Park, Hyoshin
    2022-05-01 | PDF
    State departments of transportation are utilizing unmanned aircraft systems (UAS) in a variety of applications that support planning, construction, maintenance, and operations within their jurisdictions. As the use of UAS to support road-trafficrelated applications is currently limited by a host of technical, regulatory, and operational issues, fur ...
  • Evaluation of Lightweight Aggregate for Internal Curing on Concrete Pavement in Kansas
    Evaluation of Lightweight Aggregate for Internal Curing on Concrete Pavement in Kansas
    Jenkins, Andrew ;
    Meggers, David A.
    2022-05-01 | PDF
    The purpose of this project and the Internally Cured Concrete (ICC) test section was to evaluate the benefits obtained through internal curing using pre-saturated lightweight aggregate (LWA). Two test sections were constructed on the mainline of US-54 near Iola, Kansas: a Control section and an ICC section using lightweight aggregate. Traditional l ...
  • Feasibility of 3D Printing Applications for Highway Infrastructure Construction and Maintenance
    Feasibility of 3D Printing Applications for Highway Infrastructure Construction and Maintenance
    Hart, John A ;
    Chen, Wen
    2022-05-01 | PDF
    In recent years there has been a significant increase of the interest in additive manufacturing (AM; also frequently referred to as 3D printing), yet AM is largely unexplored within infrastructure projects. By harnessing the new capabilities of AM, researchers have managed to access unprecedented new design capabilities and operational flexibility ...
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