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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 7161 - 7180 of 36114 results
  • A Remote Sensing and GISEnabled Highway Asset Management System Phase 2
    A Remote Sensing and GIS-Enabled Highway Asset Management System Phase 2
    Tsai, Yichang ;
    Wang, Zhaohua
    2018-02-02 | PDF
    The objective of this project is to validate the use of commercial remote sensing and spatial information (CRS&SI) technologies, including emerging 3D line laser imaging technology, mobile light detection and ranging (LiDAR), image processing algorithms, and GPS/GIS technologies, to improve transportation asset data collection, condition assessment ...
  • Effective Social Media Engagement Options for Minnesotas Diversifying Population
    Effective Social Media Engagement Options for Minnesota’s Diversifying Population
    Schneider, Ingrid E. ;
    Quick, Kathryn
    2018-02-02 | PDF
    Minnesota Department of Transportation (MnDOT) and Minnesota Local Road Research Board (LRRB) supported the University of Minnesota to investigate social media options for effective public engagement. A three-part approach assessed 1) the state of social media use through a literature review, 2) the status of social media use and interest in its us ...
  • Potential Transportation Impacts of Expanded USCuba Trade Final Report
    Potential Transportation Impacts of Expanded U.S.-Cuba Trade, Final Report
    Prozzi, Jolanda ;
    Wilson, Victoria
    2018-02-02 | PDF
    Before 1960, the United States and Cuba were major trading partners. At that time, Cuba was the seventh largest export market for U.S. products. In the years since then, U.S. trade with Cuba has been highly regulated. Exports have been mostly prohibited, with some exceptions for agricultural products, medical supplies, and telecommunication devices ...
  • Development of Durable Green Concrete Exposed to Deicing Chemicals via Synergistic Use of Locally Available Recycled Materials and MultiScale Modifiers
    Development of Durable Green Concrete Exposed to Deicing Chemicals via Synergistic Use of Locally Available Recycled Materials and Multi-Scale Modifiers
    Xie, Ning ;
    Cui, Na
    2018-02-02 | PDF
    From the economic and social perspectives, the use of waste materials would not be attractive until their costs and quality can satisfy the construction requirements. In this study, a pure fly ash paste (PFAP) was developed in place of ordinary Portland cement paste (OPCP). This PFAP was prepared at room temperature and without direct alkali activa ...
  • A Life Cycle Assessment Framework for Pavement Maintenance and Rehabilitation Technologies An Integrated Life Cycle Assessment LCA Life Cycle Cost Analysis LCCA Framework for Pavement Maintenance and Rehabilitation
    A Life Cycle Assessment Framework for Pavement Maintenance and Rehabilitation Technologies: An Integrated Life Cycle Assessment (LCA) – Life Cycle Cost Analysis (LCCA) Framework for Pavement Maintenance and Rehabilitation
    Lu, Qing ;
    Mannering, Fred L
    2018-02-01 | PDF
    Qing Lu (ORCID ID 0000-0002-9120-9218) Given a huge amount of annual investment and large inputs of energy and natural resources in pavement maintenance and rehabilitation (M&R) activities, significant environmental improvement and budget saving can be achieved by making eco-friendly and cost-effective decisions in scheduling M&R activities. Tradit ...
  • Central Iowa Expo Pavement Test Sections Pavement and Foundation Construction Testing and Performance Monitoring
    Central Iowa Expo Pavement Test Sections: Pavement and Foundation Construction Testing and Performance Monitoring
    White, David J. ;
    Vennapusa, Pavana
    2018-02-01 | PDF
    The Central Iowa Expo facility located in Boone, Iowa, needed to be reconstructed in 2012 to provide an improved pavement foundation for pavement with hot mix asphalt (HMA) and portland cement concrete (PCC). This rework created a unique opportunity to conduct pavement foundation research using a range of stabilization construction and testing tech ...
  • Evaluation of MITSCANT2 for Thickness Quality Control for PCC and HMA Pavements
    Evaluation of MIT-SCAN-T2 for Thickness Quality Control for PCC and HMA Pavements
    Collier, Zachary
    2018-02-01 | PDF
    Thickness is currently a pay item for PCC pavements and a quality control item for both PCC and HMA pavements. A change in pavement thickness of 0.5 in. can result in a change of multiple years of service. Current thickness measurements are performed by destructively coring the finished pavement and measuring the thickness of the core. Many times t ...
    Supporting Files
  • Use of Additional Lighting for Traffic Control and Speed Reduction in Work Zones
    Use of Additional Lighting for Traffic Control and Speed Reduction in Work Zones
    Gambatese, John A. ;
    Jafarnejad, Ali
    2018-02-01 | PDF
    Performing roadway construction work at night exposes workers to hazards that are not present or as great during the daytime. Working at night requires illuminating the area where work is taking place in order to provide sufficient lighting for the workers to see their work and to illuminate the workers. Work area lighting may also have a positive ...
  • Repair Strengthening of DistressedDamaged Ends of Prestressed Beams with FRP Composites
    Repair & Strengthening of Distressed/Damaged Ends of Prestressed Beams with FRP Composites
    Andrawes, Bassem ;
    Shaw, Ian D.
    2018-02-01 | PDF
    Over the past few decades, fiber reinforced polymer (FRP) composites have emerged as a lightweight and efficient material used for the repair and retrofit of concrete infrastructures. FRP can be applied to concrete as either externally bonded laminates or near-surface mounted (NSM) bars or plates. One problem afflicting bridge girders in cold clima ...
    Supporting Files
  • Comprehensive Evaluation of Pavement Maintenance Activities Applied to Colorado LowVolume Paved RoadsPhase II
    Comprehensive Evaluation of Pavement Maintenance Activities Applied to Colorado Low-Volume Paved Roads-Phase II
    Hafez, Marwan ;
    Ksaibati, Khaled
    2018-02-01 | PDF
    The primary objective of this report is to document the effectiveness of low-cost treatments applied to low-volume roads (LVRs) in Colorado. By analyzing historical pavement performance data and treatment records, the effectiveness of each treatment type was determined. It was concluded that some surface maintenance strategies are effective long-te ...
  • Use of Internal Curing Materials to Improve Performance of Concrete Infrastructure
    Use of Internal Curing Materials to Improve Performance of Concrete Infrastructure
    Khayat, Kamal H. ;
    Meng, Weina
    2018-02-01 | PDF
    The project presented in this report seeks to develop a proper methodology to use saturated lightweight sand (LWS) to improve the performance and prolong the service life of concrete mixtures. High-performance concrete (HPC) approved by MoDOT was used for the baseline mixture and was modified with different types and contents of saturated LWS used ...
  • Analysis of Ground Tire Rubber GTR in Mix Design on Local Roadways in Ohio
    Analysis of Ground Tire Rubber (GTR) in Mix Design on Local Roadways in Ohio
    Nazzal, Munir D. ;
    Kim, Sang Soo
    2018-02-01 | PDF
    This report summarizes the results of a research project that was conducted to: 1) evaluate the long-term field performance and life cycle cost of Ground Tire Rubber (GTR) modified pavement sections in Ohio and compare them to those obtained for pavement sections constructed using conventionally modified polymer modified asphalt mixtures, and 2) id ...
  • Secondary Collisions and Injury Severity A Joint Analysis Using Structural Equation Models
    Secondary Collisions and Injury Severity: A Joint Analysis Using Structural Equation Models
    Xie, Kun ;
    Ozbay, Kaan
    2018-02-01 | PDF
    This study aims to investigate the contributing factors to secondary collisions and the effects of secondary collisions on injury severity levels. Manhattan, which is the most densely populated urban area of New York City, is used as a case study.
  • Catastrophic Icefall Hazard Assessment Avoidance Procedures Mitigations Strategies Phase II SiteSpecific Studies
    Catastrophic Icefall Hazard Assessment, Avoidance Procedures & Mitigations Strategies, Phase II Site-Specific Studies
    Scarpato, David J.
    2018-02-01 | PDF
    The incidence of icefall is one of the most underrepresented and likely underappreciated of all the natural hazards. Falling pieces of ice are subject to melting and sublimation, and evidence of such events may be gone in a matter of days or even hours. There is very little existing research and engineering design criteria relative to icefall hazar ...
  • Experimental Shear Capacity Comparison Between Repaired and Unrepaired Girder Ends
    Experimental Shear Capacity Comparison Between Repaired and Unrepaired Girder Ends
    Shield, Carol K. ;
    Bergson, P. M.
    2018-02-01 | PDF
    Over time, the southbound exterior girder ends on each side of Pier 4 and Pier 26 of Bridge 27568 suffered significant corrosion damage that exposed transverse reinforcement, prestressing strands in the exterior side of the bottom flange and the sole plate anchorages. The girder ends were repaired in 2013 by encasing supplementary steel reinforceme ...
  • Utilization of Light Detection and Ranging for Quality Control and Quality Assurance of Pavement Grades
    Utilization of Light Detection and Ranging for Quality Control and Quality Assurance of Pavement Grades
    Rister, Brad W. ;
    McIntosh, Levi
    2018-02-01 | PDF
    Light Detection and Ranging (Lidar) technology is a useful tool that can assist transportation agencies during the design, construction, and maintenance phases of transportation projects. To demonstrate the utility of Lidar, this report discusses how Lidar data can be used while performing quality control and quality assurance (QC/QA) of pavement g ...
    Supporting Files
  • Sustainability Strategies to Minimize the Carbon Footprint for Connecticut Bus Operations
    Sustainability Strategies to Minimize the Carbon Footprint for Connecticut Bus Operations
    Lownes, Nicholas ;
    Cohen, J.
    2018-02-01 | PDF
    The objective of this study is to identify a strategy to minimize the carbon footprint for CTDOT-contracted bus operations in Connecticut, bus systems owned by CTDOT and branded as CTtransit, including resulting benefits and challenges. The economic value of investments necessary to achieve strategy goals in terms of initial capital costs, ongoing ...
  • Toward Greater Understanding of the Relationship between Public Perceptions of Speed Speed Laws and Safety
    Toward Greater Understanding of the Relationship between Public Perceptions of Speed, Speed Laws, and Safety
    Douma, Frank ;
    Alarcon, Frank
    2018-02-01 | PDF
    Speed continues to be a leading factor contributing to traffic fatalities in the U.S., implicated in over 9,500 deaths in 2015. Despite this, in recent years, some states have moved toward more lenient speed enforcement regimes. A public choice problem may be to blame: voters may not be demanding effective speed enforcement regimes of their elected ...
  • Accelerated Innovation Deployment AID Demonstration Project Intelligent Compaction and Infrared Scanning Projects
    Accelerated Innovation Deployment (AID) Demonstration Project : Intelligent Compaction and Infrared Scanning Projects
    Missouri. Dept. of Transportation
    2018-02-01 | PDF
    This report documents the Missouri Department of Transportation (MoDOT) demonstration grant award for field demonstration projects using intelligent compaction (IC) and infrared scanning (IR) (also called paver-mounted thermal profiles PMTP in the AASHTO PP80 specification). IC is an EDC 2 innovation. IR is a FHWA Strategic Highway Research Program ...
    Supporting Files
  • The Role of Street Trees for Pedestrian Safety
    The Role of Street Trees for Pedestrian Safety
    Ryan, Robert L ;
    Eisenman, Theodore S
    2018-02-01 | PDF
    This research report studies the link between street trees and the gap between pedestrians’ perceptions of safety and their actual safety while walking along street corridors. Prior to this report, there was little research highlighting the relationship between street trees and pedestrian safety. The research team undertook two projects to understa ...
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