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Showing 4981 - 5000 of 36019 results
  • Measuring Dispersal and Tracking of AntiIcing and Deicing Chemicals by Using InSitu Spectral Data Phase I
    Measuring Dispersal and Tracking of Anti-Icing and Deicing Chemicals by Using In-Situ Spectral Data – Phase I
    Belz, Nathan ;
    Fulton, Gabriel
    2020-01-01 | PDF
    Snow and ice accumulation on pavement reduces roadway surface friction, resulting in diminished vehicle maneuverability, slower travel speeds, reduced roadway capacity, and increased crash risk. Though the use of chlorides and other freeze-inhibiting substances have been shown to reduce these negative factors, methods to quantify and analyze snow a ...
  • Genetic Toolkit for Assessment and Prediction of PopulationLevel Impacts of Bridge Construction on Birds
    Genetic Toolkit for Assessment and Prediction of Population-Level Impacts of Bridge Construction on Birds
    Bay, Rachael ;
    Tell, Lisa A
    2020-01-01 | PDF
    Recent studies have highlighted alarming rates of declines in bird populations across the country. The State of California is home to over 650 resident and migrant avian species. Legislation for protecting these species has existed for over a century now, yet tools for identifying populations and understanding seasonal movement remain limited. Rece ...
  • Strengthening and Repair of Structural Concrete with a FabricReinforcedCementitiousMatrix FRCM Volume I Laboratory Studies
    Strengthening and Repair of Structural Concrete with a Fabric-Reinforced-Cementitious-Matrix (FRCM) [Volume I]: Laboratory Studies
    Myers, John J. ;
    Aljazaaeri, Zena
    2020-01-01 | PDF
    Externally bonded fiber reinforced cementitious matrix (FRCM) for structural members was tested and evaluated as a new class of composite material for repairing and strengthening infrastructures. In comparison with fiber reinforced polymer (FRP) composites, FRCM composite has a superior high temperature resistance and great compatibility with concr ...
  • SmallCell Installation in Transportation InfrastructureA Literature Review
    Small-Cell Installation in Transportation Infrastructure—A Literature Review
    Hossain, Mohammad Imran ;
    Alzarrad, Mohammad A
    2020-01-01 | PDF
    The purpose of this report is to provide information to the Illinois Department of Transportation (IDOT) on small-cell deployment on infrastructure such as light poles and traffic signals. A literature review was conducted on the technical specifications and impacts of small-cell deployment. The report explores the use of small-cell systems and pot ...
  • Making Bicycling Comfortable Identifying Minimum Infrastructure Needs by Population Segments Using a Video Survey
    Making Bicycling Comfortable: Identifying Minimum Infrastructure Needs by Population Segments Using a Video Survey
    Fitch, Dillon T. ;
    Carlen, Jane
    2020-01-01 | PDF
    In this study, researchers use survey data to analyze bicycling comfort and its relationship with socio-demographics, bicycling attitudes, and bicycling behavior. An existing survey of students, faculty, and staff at UC Davis (n=3089) who rated video clips of bicycling environments based on their perceived comfort as a part of the UC Davis annual C ...
  • Decentralized Autonomous Electric MobilityonDemand Services for Individuals With Physical and Cognitive Disabilities
    Decentralized Autonomous Electric Mobility-on-Demand Services for Individuals With Physical and Cognitive Disabilities
    Belakaria, Syrine ;
    Ammous, Mustafa
    2020-01-01 | PDF
    This report discusses the foundation of innovative decentralized mobility services for individuals with physical or cognitive disabilities using disability-friendly autonomous electric mobility on-demand (AEMoD) services. By leveraging both the Internet-of-things (IoT) and its associated fog control capabilities, this framework will enable real-tim ...
  • Enhancing Performance of FiberReinforced Concrete for Construction and Repair
    Enhancing Performance of Fiber-Reinforced Concrete for Construction and Repair
    Khayat, Kamal H.
    ORCID ICON IMG
    2020-01-01 | PDF
    The overarching purpose of this research is development of knowledge and a novel technique to enhance properties of Eco-Bridge-Crete, FR-SCC and FR-SWC for higher crack resistance and improved flexural properties in construction and repair by taking advantage of hybrid fibers, chemical admixtures (shrinkage reducing agents and expansive agents) and ...
  • Evaluation of the Performance of A1010 Bridge Steel
    Evaluation of the Performance of A1010 Bridge Steel
    Phares, Brent ;
    Shafei, Behrouz
    2020-01-01 | PDF
    ASTM A1010 steel is a nominal 12% chromium (10.5% minimum and 12.5% maximum) steel reported to have enhanced corrosion resistance compared to traditional painted structural steels, weathering steels, and galvanized steels. In 2016, the Iowa Department of Transportation (DOT) built a four-span bridge partially constructed using A1010 steel. Despite ...
  • Study of Temporal Pavement Cracking in 3D to Determine Optimal Time and CostEffective Treatment Methods
    Study of Temporal Pavement Cracking in 3D to Determine Optimal Time and Cost-Effective Treatment Methods
    Tsai, Yichang ;
    Wu, Yiching
    2020-01-01 | PDF
    The Georgia Department of Transportation (GDOT) and many of its counterparts now collect the full-extent, high-resolution 3D pavement data to provide a full coverage (or continuous) of pavement distress data on its roadways. This project focuses on exploring the potential for taking full advantage of 3D pavement data in support of using slab-level ...
  • Reference Test System for Machine Vision Used for ADAS Functions
    Reference Test System for Machine Vision Used for ADAS Functions
    Nayak, Abhishek ;
    Pike, Adam
    2020-01-01 | PDF
    Advanced Driver Assistance Systems (ADAS) like Lane Departure Warning (LDW) and Lane Keep Assist (LKA) have been available for several years now but has experienced low customer acceptance and market penetration. These deficiencies can be traced to the inability of many of the perception systems to consistently recognize lane markings and localize ...
  • Performance of Synthetic FiberReinforced Concrete with Adapted Rheology
    Performance of Synthetic Fiber-Reinforced Concrete with Adapted Rheology
    Khayat, Kamal H.
    ORCID ICON IMG
    2020-01-01 | PDF
    The main objectives of this project can be summarized as follows: 1. Optimize the SRA-fiber system of SCC and SWC mixtures to achieve superior performance, including properties, autogenous shrinkage, restrained shrinkage, mechanical properties (tensile and compressive strength), frost durability, and transport properties. The investigation will inc ...
  • Work Zone Safety Performance on Illinois State Routes
    Work Zone Safety Performance on Illinois State Routes
    Schattler, Kerrie L. ;
    Maharjan, Sadit
    2020-01-01 | PDF
    The Illinois Department of Transportation (IDOT) faces challenges in understanding the causes of increased work zone crashes. Although direct safety metrics of work zone (WZ) crashes are useful, they do not completely reflect work zone safety performance. A research project was commissioned to examine the correlation between WZ exposure and crashes ...
  • Dynamic Metering in Connected Urban Street Networks Improving Mobility
    Dynamic Metering in Connected Urban Street Networks: Improving Mobility
    Hajbabaie, Ali ;
    Mohebifard, Rasool
    2020-01-01 | PDF
    Traffic metering offers great potential for reducing congestion in oversaturated urban street networks. The available metering approaches rely on aggregated traffic flow dynamics to find metering rates that keep the number of vehicles inside congested areas within a predefined accumulation range. In such approaches, the aggregated traffic metering ...
  • Effects of Stormwater Runoff from Selected Bridge Decks on Conditions of Water Sediment and Biological Quality in Receiving Waters in South Carolina 2013 to 2018
    Effects of Stormwater Runoff from Selected Bridge Decks on Conditions of Water, Sediment, and Biological Quality in Receiving Waters in South Carolina, 2013 to 2018
    Journey, Celeste A. ;
    Petkewich, Matthew D
    2020-01-01 | PDF
    The U.S. Geological Survey, in cooperation with the South Carolina Department of Transportation, investigated the effects of stormwater runoff from bridge decks on stream water quality conditions in South Carolina. The investigation assessed 5 bridges in 3 physiographic provinces in South Carolina (Piedmont, Upper Coastal Plain, and Lower Coast Pla ...
  • The Influence of the Built Environment on Crash Risk in Lower Income and HigherIncome Communities
    The Influence of the Built Environment on Crash Risk in Lower Income and Higher-Income Communities
    Dumbaugh, Eric ;
    Li, Yanmei
    2020-01-01 | PDF
    This report presents the findings of a study that uses negative binomial regression models to examine differences in the relationship between the built environment and crash incidence for block groups in Orange County, Florida. It finds notable differences in the modelled variables between these income groupings, both in the magnitude and the direc ...
  • CALTRANS Freight Academy 2020 Research Brief
    CALTRANS Freight Academy 2020 [Research Brief]
    O’Brien, Thomas (Tom)
    ORCID ICON IMG
    2020-01-01 | PDF
    The Caltrans Freight Academy was conducted on December 1-3, 8, and 10, 2020. The Academy was designed and coordinated by the California State University, Long Beach (CSULB) Center for International Trade and Transportation (CITT) under Task Order 022 (Contract No. 65A0674) as part of its work for the Caltrans-supported Pacific Southwest Region Univ ...
  • Volume I Performance of FiberReinforced SelfConsolidating Concrete for Repair of Bridge SubStructures and Fiber Reinforced Super Workable Concrete for Infrastructure Construction
    Volume I: Performance of Fiber-Reinforced Self-Consolidating Concrete for Repair of Bridge Sub-Structures and Fiber Reinforced Super Workable Concrete for Infrastructure Construction
    Khayat, Kamal H. ;
    Abdelrazik, Ahmed
    2020-01-01 | PDF
    The proposed research investigates the combined use of self-consolidating concrete (SCC) and fibers reinforcements to develop a novel repair material, fiber-reinforced self-consolidating concrete (FR-SCC) that can be used for the rehabilitation and strengthening of existing structures. Furthermore, the feasibility of using super workable concrete ( ...
  • Repair and Testing of OutofPlane Seismic Response of Pocket Connections
    Repair and Testing of Out-of-Plane Seismic Response of Pocket Connections
    Romero, Allan J. ;
    Moustafa, Mohamed A.
    2020-01-01 | PDF
    Accelerated bridge construction (ABC) has been utilized in precast bridge structures because of its advantage to expedite on-site construction. In ABC, one of the main concerns is the joint connection as it needs to be well designed to maintain structural integrity. Several studies were able to demonstrate the effectiveness of ABC pocket connection ...
  • Analysis of the NonDriving Mobility Needs of People with Disabilities
    Analysis of the Non-Driving Mobility Needs of People with Disabilities
    Owens, Justin M ;
    Miller, Andrew
    2020-01-01 | PDF
    This report presents the findings and conclusions of a multi-methodology investigation into the transportation-related needs and barriers facing people with disabilities (PWD). Data collection consisted of a nationwide survey, with participant recruitment assisted by a variety of disability advocacy groups, and follow-on interviews conducted with a ...
  • Multilevel Impacts of Emerging Technologies on City Form and Development
    Multilevel Impacts of Emerging Technologies on City Form and Development
    Howell, Amanda ;
    Tan, Huijun
    2020-01-01 | PDF
    Autonomous vehicles (AVs) are a near future reality and the implications of AVs on city development and urban form, while potentially widespread and dramatic, are not well understood. In addition, there are other fundamentally disruptive technological forces undergoing simultaneous rapid development and deployment, including the introduction of new ...
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