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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 3681 - 3700 of 36011 results
  • Community Engagement in Rural Communities
    Community Engagement in Rural Communities
    Uddin, Mohammad Moin ;
    Foster, Kelly
    2021-05-01 | PDF
    Public involvement is defined as a two-way communication aimed at providing information to the public and incorporating the views, concerns, and issues of the public in the transportation decision-making process. By involving the public early in planning transportation projects and throughout the development and implementation of projects, a transp ...
  • Smart Interaction Pedestrians and Vehicles in a CAV Environment
    Smart Interaction Pedestrians and Vehicles in a CAV Environment
    Zhang, Yunchang ;
    Fricker, Jon D.
    2021-05-01 | PDF
    “Semi-controlled” crosswalks exist because of the desire for pedestrians to cross there and the use of stop signs or signals is not warranted. However, there is a sufficient amount of interaction between pedestrians and vehicles at “semi-controlled” crosswalks to be concerned about the time at which “negotiations” between pedestrians and human driv ...
  • Analysis of ActivityTravel Patterns and Tour Formation of Transit Users
    Analysis of Activity-Travel Patterns and Tour Formation of Transit Users
    McNally, Michael G ;
    Rafiq, Rezwana
    2021-04-30 | PDF
    This study analyzed the complex travel behavior of transit users by expanding conventional trip-based approaches by considering full activity-travel tours and patterns as basic units of analysis. A tour was defined as a sequence of trips that begins and ends at home and a pattern was defined as an entire day’s sequence of activities and associated ...
  • Construction and Materials Best Practices for Concrete Sidewalks
    Construction and Materials Best Practices for Concrete Sidewalks
    Brena, Sergio ;
    Peterman, Kara
    2021-04-30 | PDF
    This report summarizes an 18-month effort to investigate best practices to incorporate into the materials and construction of concrete sidewalks to mitigate surface scaling damage induced by freeze-thaw cycles in the presence of deicing chemicals. The study involved an in-situ experimental study accompanied by laboratory testing and quantitative an ...
  • Evaluating the Connection Between Transit and TNCs Transportation Network Companies in Pinellas County for Statewide Application
    Evaluating the Connection Between Transit and TNCs (Transportation Network Companies) in Pinellas County for Statewide Application
    Peng, Zhong-Ren ;
    Qin, Haoming
    2021-04-30 | PDF
    This report proposes to conduct a comprehensive investigation of active and inactive partnerships between transit agencies and TNCs in Pinellas County to enhance understanding of project development and how the partnership can be cost-effectively achieved. This report used a spatiotemporal analysis and on the Direct Connect rides over the past thre ...
  • FDOT Procedures for Welding Testing and Fabricating Weathering Stainless Steel for Bridge Applications
    FDOT Procedures for Welding, Testing, and Fabricating Weathering Stainless Steel for Bridge Applications
    Khan, Adil ;
    Dzikowski, Phil
    2021-04-30 | PDF
    Weathering steels have been gaining acceptance in the fabrication of highway structures and bridges across the US. Over the last decade, several transportation agencies have made concerted efforts to utilize weathering steels for structures in areas where they can be used safely and effectively. The primary factor for this change is the potential c ...
  • Innovative Foundation Alternative for HighSpeed Rail Application
    Innovative Foundation Alternative for High-Speed Rail Application
    Stephenson, Andrew ;
    Chang, Michelle
    2021-04-22 | PDF
    High-speed railway provides a fast and robust travel choice that enhances transport of people and goods, which may act as the national economy's main artery. Compared to conventional railways, HSR has more stringent structural and geotechnical requirements to minimize deformations and avoid excessive vibrations. Bridges are a key component of the H ...
  • Evaluation of the Filtration Effectiveness of Dewatering Bags and Assessment of Potential Improvements
    Evaluation of the Filtration Effectiveness of Dewatering Bags and Assessment of Potential Improvements
    Lloyd, Lewis N.
    2021-04-21 | PDF
    Geotextile dewatering bags are used on construction sites to treat sediment-laden construction discharge water pumped from excavations or behind cofferdams. Although these bags have become popular because of their small footprint on the construction site, recent observations have revealed that in some cases, fine sediment can pass through these bag ...
  • Fly-By Image Processing for Real-Time Congestion Mitigation [supporting datasets]
    Uddin, Nasim ;
    Latef, Abdel Aziz Abdel
    2021-04-14 | ZIP
    Traffic monitoring is the centerpiece of congestion mitigation and traffic management. Whilst surveillance technologies have matured enough to provide informative depiction for the traffic, the current state-of-the-art systems cannot support immediate congestion problems. Proactive congestion mitigation requires a) real-time surveillance for traffi ...
    Dataset Supporting Files
  • Proactive Management of Mobility Impact of Interdependent Subsurface Utility and Roadway Construction through Incentives
    Proactive Management of Mobility Impact of Interdependent Subsurface Utility and Roadway Construction through Incentives
    Zhang, Zhuoran ;
    Akinci, Burcu
    2021-04-14 | PDF
    This study aims to assist maintenance agencies in scheduling maintenance activities when assessing the impacts of conducting maintenance on a bridge and the cost of the detour, and the risk of crashes during the presence of the maintenance activity. Firstly, the authors build a predictive infrastructure maintenance expenditure model that predicts t ...
  • Replacement of SDDOTs Roadway Evaluation System
    Replacement of SDDOT’s Roadway Evaluation System
    Bauer, Thad
    2021-04-13 | PDF
    The South Dakota Department of Transportation (SDDOT) Office of Transportation Inventory Management operates a road and pavement evaluation system consisting of a vehicle equipped with roadway evaluation equipment and computers at the SDDOT central office to process data collected by the vehicle. This system acquires roadway and pavement images, pa ...
  • Laboratory Tests on Scaled Steel Fin Pile Foundations
    Laboratory Tests on Scaled Steel Fin Pile Foundations
    Prabhu, S ;
    Te, P
    2021-04-09 | PDF
    The use of steel fin pile foundations (SFPFs) for offshore structures and their efficiency in increasing the lateral load capacity compared to unfinned piles has been extensively studied. Recently, SFPFs were introduced in the field of transportation engineering for supporting structures including signs, signals, etc. In these applications, foundat ...
  • Correlation of Slag Cement Composition with Durability of Portland CementSlag Concrete
    Correlation of Slag Cement Composition with Durability of Portland Cement–Slag Concrete
    Zayed, Abla ;
    Riding, Kyle
    2021-04-01 | PDF
    Three ordinary portland cements (OPC), three limestone cements (IL), and seven ground granulated blast furnace slags (GGBFS/slag) were used to investigate the heat generation, adiabatic temperature rise, sulfate optimization, sulfate durability (external and internal), and chloride durability in slag-blended cementitious systems. The as-received ma ...
  • Software and Hardware Systems for Autonomous Smart Parking Accommodating Both Traditional and Autonomous Vehicles
    Software and Hardware Systems for Autonomous Smart Parking Accommodating Both Traditional and Autonomous Vehicles
    Al Faruque, Mohammad Abdullah ;
    Odema, Mohanad
    2021-04-01 | PDF
    Parking infrastructure is suffering from congestion as the number of vehicles circulating in urban areas is growing and expansion is not a cost-effective solution. In parallel, developments in autonomous vehicle technology mean that driverless vehicles are predicted to be in circulation by the 2020s and makeup 40% of vehicle travel by the 2040s. Ex ...
  • Predicting Bus Travel Times in Washington DC Using Artificial Neural Networks ANNs
    Predicting Bus Travel Times in Washington, DC Using Artificial Neural Networks (ANNs)
    Arhin, Stephen ;
    Manandhar, Babin
    2021-04-01 | PDF
    Washington, DC is ranked second among cities in terms of highest public transit commuters in the United States, with approximately9% of the working population using the Washington Metropolitan Area Transit Authority (WMATA) Metrobuses to commute. Deducing accurate travel times of these metrobuses is an important task for transit authorities to prov ...
  • Laboratory and Field Performance Evaluation of Pavement Sections With High PolymerModified Asphalt Overlays
    Laboratory and Field Performance Evaluation of Pavement Sections With High Polymer-Modified Asphalt Overlays
    Habbouche, Jhony ;
    Boz, Ilker
    2021-04-01 | PDF
    In 2014, researchers at the Virginia Transportation Research Council initiated a study to evaluate the effectiveness of using high polymer-modified (HP) binders in surface asphalt concrete (AC) mixtures. The results were promising enough to support a field study investigating the use of HP binders in asphalt mixtures over jointed concrete pavement. ...
  • Coordinated AntiCongestion Control Algorithms for Diverging Diamond Interchanges
    Coordinated Anti-Congestion Control Algorithms for Diverging Diamond Interchanges
    Coogan, Sam ;
    Thitsa, Makhin
    2021-04-01 | PDF
    The main objective of this research project is to develop data-driven traffic prediction and control algorithms for congestion management of diverging diamond interchanges (DDIs) and their surroundings. The project proposes an algorithm that leverages recent advances in data-driven modeling, namely, partial least squares multivariate regression, in ...
  • Estimating Traffic Stream Density Using Connected Vehicle Data
    Estimating Traffic Stream Density Using Connected Vehicle Data
    Aljamal, Mohammad A ;
    Abdelghaffar, Hossam M.
    2021-04-01 | PDF
    The macroscopic traffic stream density is crucial in advanced traffic management systems. However, measuring the traffic density in the field is difficult since it is categorized as a spatial measurement. In this report, several estimation approaches are developed to estimate the traffic stream density on signalized links using connected vehicle (C ...
  • Division of Planning Research on Call ROC Task 5 Effective EJ and LEP Engagement Strategies and Methods for Statewide Plans
    Division of Planning Research on Call (ROC) Task 5: Effective EJ and LEP Engagement Strategies and Methods for Statewide Plans
    Daniels, Susan ;
    Anacki, Abby
    2021-04-01 | PDF
    Transportation agencies often struggle engaging environmental justice (EJ) and low English proficiency (LEP) populations in their public involvement efforts. This issue becomes worsened when the public involvement if for statewide plans or projects, an already difficult task for public engagement as a whole. This research aims to determine the best ...
  • Structural Design Methodology for Spray Applied Pipe Liners in Gravity Storm Water Conveyance Conduits
    Structural Design Methodology for Spray Applied Pipe Liners in Gravity Storm Water Conveyance Conduits
    Najafi, Mohammad ;
    Yu, Xinbao
    2021-04-01 | PDF
    To reduce high cost of emergency repairs and disruptions to travelling public, and prior to loss of host pipe integrity and soil-structure interaction, departments of transportations (DOTs) can use polymeric or cementitious/geopolymer spray applied pipe linings (SAPLs) to renew deteriorated gravity storm conduits and culverts. The AASHTO – National ...
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