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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 5981 - 6000 of 36055 results
  • Every Day Counts OnRamp to Innovation EDC5 Summit Summary and Baseline Report March 2019
    Every Day Counts: On-Ramp to Innovation - EDC-5 Summit Summary and Baseline Report, March 2019
    United States. Federal Highway Administration
    2019-03-01 | PDF
    Every Day Counts (EDC) is the Federal Highway Administration’s program to advance a culture of innovation in the transportation community in partnership with public and private stakeholders. Through this State-based effort, FHWA coordinates rapid deployment of proven strategies and technologies to shorten the project delivery process, enhance roadw ...
  • MASH Evaluation of TxDOT Roadside Safety FeaturesPhase II
    MASH Evaluation of TxDOT Roadside Safety Features—Phase II
    Bligh, Roger P. ;
    Menges, Wanda L.
    2019-03-01 | PDF
    In 2009, the American Association of State Highway and Transportation Officials (AASHTO) published the Manual for Assessing Safety Hardware (MASH), which supersedes the previous crash test and evaluation guidelines. A MASH implementation agreement was jointly developed and adopted by the Federal Highway Administration and AASHTO. It establishes imp ...
  • V2X Bringing Bikes Into the Mix
    V2X: Bringing Bikes Into the Mix
    Fickas, Stephen
    ORCID ICON IMG
    2019-03-01 | PDF
    This project demonstrates how an inexpensive system (hardware and software) can add new functionality to existing signal controllers, giving bicyclists an efficient way to cross a controlled intersection. The system integrates three components: (1) a Bike Connect box that resides near the signal-controller and is connected to it, (2) an application ...
  • Corrosion Durability of Reinforced Concrete Utilizing UHPC for ABC Applications
    Corrosion Durability of Reinforced Concrete Utilizing UHPC for ABC Applications
    Farzad, Mahsa ;
    Fancy, Saiada Fuadi
    2019-03-01 | PDF
    In the United States, ~30% of the ~600,000 highway bridges are labeled structurally deficient or functionally obsolete. Approximately 65% of the bridges in the United State are reinforced concrete, of which 40% are classified as structurally deficient or functionally obsolete. Many of these bridges are damaged due to chloride induced corrosion of t ...
  • NDT Methods Applicable to Health Monitoring of ABC Closure Joints
    NDT Methods Applicable to Health Monitoring of ABC Closure Joints
    Mehrabi, Armin ;
    Farhangdoust, Saman
    2019-03-01 | PDF
    In Accelerated Bridge Construction (ABC), prefabricated bridge deck elements are connected using “Closure Joints.” Because of cast-in-place nature of closure joints that are expected to go into service and field observations, there have been some concerns about their long-term durability. This has necessitated the need for health monitoring of ABC ...
  • Transferability Forecasting of the Pedestrian Index of the Environment PIE for Modeling Applications
    Transferability & Forecasting of the Pedestrian Index of the Environment (PIE) for Modeling Applications
    Clifton, Kelly J. ;
    Orrego-Oñate, Jaime P
    2019-03-01 | PDF
    This project focuses on making our measures, models, and methods more transferable to other locations. Specifically, we re-evaluate, compare and test our pedestrian index of the environment (PIE) measure using data resources more commonly available to planning agencies across the country. Next, we test the results of PIE and its input data in model ...
  • MASH Test 310 on Wyoming Box Beam Shoulder Barrier
    MASH Test 3–10 on Wyoming Box Beam Shoulder Barrier
    Bligh, Roger P. ;
    Menges, Wanda L.
    2019-03-01 | PDF
    The objective of this project was to complete the Manual for Assessing Safety Hardware (MASH) evaluation of the Wyoming box beam shoulder barrier by performing MASH Test 3-10. MASH Test 3-10 involves an 1100C vehicle impacting the barrier at a target impact speed and impact angle of 62 mi/h and 25°, respectively. This report provides details of the ...
  • Performance Comparison of InService FullDepth Precast Concrete Deck Panels to CastinPlace Decks
    Performance Comparison of In-Service, Full-Depth Precast Concrete Deck Panels to Cast-in-Place Decks
    Garber, David ;
    Shahrokhinasab, Esmail
    2019-03-01 | PDF
    Full-depth, precast concrete deck panels have been heavily used in bridge construction since the 1970’s. The use of these panels has traditionally been thought to both accelerate construction and improve the long-term durability performance of the bridge deck. While many engineers and academia are intrinsically aware that confined precast can perfo ...
  • Enhancement of MechanisticEmpirical Pavement Design Guide for Roadway Design and Construction in the State of Wyoming Research Brief
    Enhancement of Mechanistic-Empirical Pavement Design Guide for Roadway Design, and Construction in the State of Wyoming [Research Brief]
    Ng, Kam W. ;
    Ksaibati, Khaled
    2019-03-01 | PDF
    To account for different variables related to traffic, climate and materials, and their interactions affecting pavement performance, a research effort initiated by the National Cooperative Highway Research Program (NCHRP) has led to the development of a Mechanistic-Empirical Pavement Design Guide. This guide is being adapted by the Wyoming Departme ...
  • Deep Shear Wave Velocity Profiling in Northeastern Arkansas
    Deep Shear Wave Velocity Profiling in Northeastern Arkansas
    Wood, Clinton M. ;
    Baker, Ethan
    2019-03-01 | PDF
    Deep dynamic site characterization was conducted at fifteen ARDOT bridge sites in northeast Arkansas with the goal of developing shear wave velocity profiles to bedrock. A combination of active and passive surface wave methods along with horizontal to vertical spectral ratio measurements were used to develop the Vs profiles. These Vs profiles along ...
  • RiskBased Construction Inspection
    Risk-Based Construction Inspection
    Xu, Xin ;
    Zhang, Yuxi
    2019-03-01 | PDF
    Construction inspection is a critical component in the quality assurance (QA) program to ensure the quality and long-term performance of pavements. Over the years, Indiana Department of Transportation (INDOT) has been developing and modifying its standard specification to set requirements for construction inspection and material testing. With the r ...
  • Field Implementation and Monitoring of Behavior of Economical and CrackFree HighPerformance Concrete for Pavement and Transportation Infrastructure Constructions Phase II Research Summary
    Field Implementation and Monitoring of Behavior of Economical and Crack-Free High-Performance Concrete for Pavement and Transportation Infrastructure Constructions – Phase II [Research Summary]
    Khayat, Kamal H. ;
    Mehdipour, Iman
    2019-03-01 | PDF
    Economical and crack-free high-performance concrete (Eco-HPC) is a new class of environmentally friendly and cost-effective high-performance concrete (HPC) that is made of low binder content, high volume of supplementary cementitious materials (SCMs), and shrinkage mitigating materials. The initial phase of research that involved an extensive labor ...
  • Real Time Classification of Vehicle Types and Modes using Image Analysis and Data Fusion
    Real Time Classification of Vehicle Types and Modes using Image Analysis and Data Fusion
    Huynh, Nathan N. ;
    Mullen, Robert L
    2019-03-01 | PDF
    Several methodologies to count and classify vehicles from video recordings were explored in this research to provide transportation agencies with a safer alternative to collect these data which are needed for traffic engineering and planning studies. In this study, three approaches for detecting and classifying vehicles were investigated: Haar-like ...
  • Development of a Tool to Assess Effectiveness of Intermodal Facility Locations and Designs
    Development of a Tool to Assess Effectiveness of Intermodal Facility Locations and Designs
    Huynh, Nathan N. ;
    Ferrell, William
    2019-03-01 | PDF
    This study is focused on the design and operation of a freight network that supports horizontal carrier collaboration where two or more carriers form an alliance and share pick-up and delivery of jobs. In carrier collaboration, it is assumed that carriers are allowed to retain some of the pickup and delivery jobs they receive from clients while rel ...
  • Field Implementation of HighVolume Recycled Materials for Sustainable Pavement Construction Research Summary
    Field Implementation of High-Volume Recycled Materials for Sustainable Pavement Construction [Research Summary]
    Khayat, Kamal H.
    ORCID ICON IMG
    2019-03-01 | PDF
    The objective of this study was to evaluate the feasibility of producing sustainable concrete materials for rigid pavement construction using high volumes of recycled materials. The goal was to replace 50% of all solid materials in the concrete with recycled materials and industrial by-products.
  • Streamlining Locallet Federalaid Transportation Processes in Ohio Summary
    Streamlining Local-let Federal-aid Transportation Processes in Ohio [Summary]
    Sperry, Benjamin R. ;
    Staley, Blake
    2019-03-01 | PDF
    The Federal-aid highway program (FAHP) is a cooperative partnership between the U.S. Federal Highway Administration (FHWA) and State DOTs for the purposes of implementing FHWA-funded highway construction projects and related activities. FHWA permits State DOTs to allow Local Public Agencies (LPAs) to perform work on projects where Federal-aid funds ...
  • Streamlining LocalLet FederalAid Transportation Processes in Ohio
    Streamlining Local-Let Federal-Aid Transportation Processes in Ohio
    Sperry, Benjamin R. ;
    Staley, Blake
    2019-03-01 | PDF
    Ohio’s local public agencies (LPAs) administer an average of $335 million of Federal-aid projects annually through the ODOT local-let program. ODOT has made significant strides to improve the efficiency of its Federal-aid program delivery process for LPA-administered projects in recent years. The objective of this research was to undertake a review ...
  • Evaluation of Maintenance Procedures for Hard Shoulder Running Phase 1
    Evaluation of Maintenance Procedures for Hard Shoulder Running, Phase 1
    Green, Roger ;
    Robbins, Mary
    2019-03-01 | PDF
    To address traffic congestion, the Ohio Department of Transportation (ODOT) plans to use the inside eastbound shoulder of I-670 on the east side of Columbus as an additional traffic lane during the afternoon commute as a trial of hard shoulder running active traffic management. In order to fully implement hard shoulder running a review and possible ...
  • Investigation of Low Visibility Related Crashes in Florida
    Investigation of Low Visibility Related Crashes in Florida
    Lee, Jaeyoung ;
    Abdel-Aty, Mohamed
    2019-03-01 | PDF
    Florida is among the top states in the United States with fatal crashes resulting from reduced visibility conditions due to fog or smoke, according to the National Highway Traffic Safety Administration (NHTSA). This project aims at identifying hotspot clusters for fog/smoke crashes in Florida, and investigating hot segments, hot intersections, and ...
  • Characterization of Crushed Base Materials in Wyoming Final Report 2019
    Characterization of Crushed Base Materials in Wyoming [Final Report 2019]
    Ng, Kam ;
    Mebrahtom, Dawit
    2019-03-01 | PDF
    To improve the pavement design and construction in Wyoming, the Wyoming Department of Transportation (WYDOT) is adopting the Mechanistic-Empirical Pavement Design Guide (MEPDG). A full implementation of MEPDG requires the characterization of local crushed base materials. In this research, laboratory experiments on resilient modulus were performed t ...
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