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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 8121 - 8140 of 36151 results
  • Breaking Barriers to Bike Share Insights on Equity from a Survey of Bike Share System Owners and Operators
    Breaking Barriers to Bike Share: Insights on Equity from a Survey of Bike Share System Owners and Operators
    Howland, Steven ;
    McNeil, Nathan
    2017-05-01 | PDF
    The number of public bike share systems has been increasing rapidly across the United States over the past five to 10 years. To date, most academic research around bike share in the U.S. has focused on the logistics of planning and operationalizing successful systems. Investigations of system users and impacts on the local community are less common ...
  • Improving Livability Using Green and Active Modes A Traffic Stress Level Analysis of Transit Bicycle and Pedestrian Access and Mobility
    Improving Livability Using Green and Active Modes: A Traffic Stress Level Analysis of Transit, Bicycle, and Pedestrian Access and Mobility
    Mekuria, Maaza C. ;
    Appleyard, Bruce S.
    2017-05-01 | PDF
    Understanding the relative attractiveness of alternatives to driving is vitally important toward lowering driving rates and, by extension, vehicle miles traveled (VMT), traffic congestion, greenhouse gas (GHG) emissions, etc. The relative effectiveness of automobile alternatives (i.e., buses, bicycling, and walking) depends on how well streets are ...
  • Economical and crackfree highperformance concrete for pavement and transportation infrastructure construction
    Economical and crack-free high-performance concrete for pavement and transportation infrastructure construction.
    Khayat, Kamal H. ;
    Mehdipour, Iman
    2017-05-01 | PDF
    The main objective of this research is to develop and validate the behavior of a new class of environmentally friendly and costeffectivehigh-performance concrete (HPC) referred to herein as Eco-HPC. The proposed project aimed at developing two classesof Eco-HPC for the following applications: (i) HPC for pavement construction (Eco-Pave-Crete); and ...
  • Use of positive protection in work zones transportation synthesis
    Use of positive protection in work zones : transportation synthesis.
    CTC & Associates LLC
    2017-05-01 | PDF
    The MnDOT Office of Traffic, Safety and Technology is developing a manual on the use of temporary barriers, truck-mounted attenuators and other types of positive protection devices as guidance for designers, construction workers and contractors. To support the development of this manual, MnDOT is interested in gathering information about best pract ...
  • Identifying and reconciling stakeholder perspectives in deploying automated speed enforcement final report
    Identifying and reconciling stakeholder perspectives in deploying automated speed enforcement : final report.
    Peterson, Colleen ;
    Douma, Frank
    2017-05-01 | PDF
    Speeding is a public-health crisis, making up approximately a third of roadway deaths each year in the UnitedStates. One countermeasure with clearly documented efficacy to reduce speed is automated speed enforcement(ASE). Public acceptance of ASE, however, has been marginal with many drivers calling into question its need andlegality. This project ...
  • Performance tradeoff in an adaptive IEEE 80211ad waveform design for a joint automotive radar and communication system
    Performance trade-off in an adaptive IEEE 802.11ad waveform design for a joint automotive radar and communication system.
    Heath, Robert W. ;
    Kumari, Preeti
    2017-05-01 | PDF
    The IEEE 802.11ad waveform can be used for automotive radar by exploiting the Golay complementary sequences in the preamble of a frame. The performance of radar, however, is limited by the preamble structure. In this paper, we propose an adaptive preamble design that permits a trade-off between radar parameters’ estimation accuracy and communicatio ...
  • Data Presentation on Transportation Agency Websites Trends and Best Practices
    Data Presentation on Transportation Agency Websites: Trends and Best Practices
    Cherman, Frances
    2017-05-01 | PDF
    The Division of Research, Innovation and System Information (DRISI) within California’s Department of Transportation (Caltrans) provides solutions and knowledge that improves California’s transportation system. The Division recently sought to determine whether the data it provides on the agency’s website, the way it’s organized, and how it’s delive ...
  • Analyzing the Impact of Median Treatments on PedestrianBicyclist Safety Research Summary
    Analyzing the Impact of Median Treatments on Pedestrian/Bicyclist Safety: Research Summary
    Zhang, Lei
    ORCID ICON IMG
    2017-05-01 | PDF
    Results of the trend analysis showed that treatment sites (where median treatments have been installed) experienced lower or similar crash rates for all crash types after the treatment, while control sites (no median treatments) experience higher crash rates during the same time period.
  • Evaluation of asphalt pavement interface conditions for enhanced bond performance
    Evaluation of asphalt pavement interface conditions for enhanced bond performance.
    Roque, Reynaldo ;
    Hernando, David
    2017-05-01 | PDF
    This project describes a comprehensive modeling effort aimed at examining the potential impact of interface debonding on near-surface longitudinal cracking in the wheelpath of asphalt pavements. A critical zone defined by high shear stress coupled with low confinement was found at a depth of about 2 in and extending to 2 in from the edge of the tir ...
  • Delivering GDOTs Work Program Developing Strategies for Successful Communication at Public Meetings and Open Houses to Enhance the Conceptual Understanding and Awareness of Need and Purpose Transportation Deficiencies and Consequences of Not IMP
    Delivering GDOT’s Work Program: Developing Strategies for Successful Communication at Public Meetings and Open Houses to Enhance the Conceptual Understanding and Awareness of Need and Purpose, Transportation Deficiencies, and Consequences of Not IMP
    Maghiar, Marcel ;
    Aasheim, Cheryl
    2017-05-01 | PDF
    The research project’s purpose was to determine the most effective strategies, methods, and formats to inform the public about Georgia Department of Transportation’s (GDOT) Work Program. The researchers investigated the United States Department of Transportation (US DOT) and other state DOTs to determine what methods to employ for best practices to ...
  • Manual on performance of traffic signal systems assessment of operations and maintenance
    Manual on performance of traffic signal systems: assessment of operations and maintenance.
    Stevanovic, Aleksander ;
    Radivojevic, Danilo
    2017-05-01 | PDF
    The annual evaluation of traffic signal systems on an agency level can be of great importance for identifying problems, self-assessment, budgeting, creating the strategy for future steps, etc. The most famous similar effort of this type is the National Traffic Signal Report Card (NTSRC), which is used as an evaluation methodology for agencies count ...
  • Computational enhancements for the Virginia Department of Transportation Regional River Severe Storm R2S2 Model
    Computational enhancements for the Virginia Department of Transportation Regional River Severe Storm (R2S2) Model
    Morsy, Mohamed M. ;
    O'Neil, Gina L.
    2017-05-01 | PDF
    Climate change introduces infrastructure flooding challenges, especially for coastal regions with low topographic relief. More frequently occurring intense storms and sea level rise are two projected impacts of climate change that will lead to increased flooding risks. These changing conditions make having the ability to forecast accurately potenti ...
  • Region V Transportation Workforce Assessment and Summit
    Region V Transportation Workforce Assessment and Summit
    Adams, Teresa ;
    Hart, Maria
    2017-05-01 | PDF
    The transportation workforce is undergoing unprecedented change due to rapid retirement of baby boomers while at the same time information, communication, and automation technologies are rapidly changing the transportation of people and goods. The purpose of this project is to lay the groundwork for addressing the transportation workforce challenge ...
  • Nondestructive testing NDT of a segmental concrete bridge scheduled for demolition with a focus on condition assessment and corrosion detection of internal tendons
    Non-destructive testing (NDT) of a segmental concrete bridge scheduled for demolition, with a focus on condition assessment and corrosion detection of internal tendons.
    Azizinamini, Atorod
    2017-05-01 | PDF
    The service life and durability of prestressed concrete in bridges are vulnerable to corrosion damages due to many factors such as construction, material, and environment. To ensure public safety, it is important to inspect these structures and to develop appropriate mitigation measures for corrosion damages. The availability of Non Destructive Tes ...
  • A comparison study of oneand twodimensional hydraulic models for river environments
    A comparison study of one-and two-dimensional hydraulic models for river environments.
    Deal, Evan C. ;
    Parr, A. David
    2017-05-01 | PDF
    Computer models are used every day to analyze river systems for a wide variety of reasons vital tothe public interest. For decades most hydraulic engineers have been limited to models that simplify the fluidmechanics to the unidirectional case. With the advent of higher quality data and greater computationalpower, two-dimensional hydrodynamic model ...
  • Validation of RAP andor RAS in hydraulic cement concrete technical report
    Validation of RAP and/or RAS in hydraulic cement concrete : technical report.
    Mukhopadhyay, Anol ;
    Shi, Xijun
    2017-05-01 | PDF
    The increasing maintenance and rehabilitation actions lead to considerable amounts of reclaimed asphalt pavement(RAP) left in stockpiles in the United States. The possible use of RAP in Portland cement concrete (PCC) as aggregatereplacement not only would help dispose of excess RAP stockpiles, but also provide a reduction in virgin aggregateconsump ...
  • Successes in Stewardship Commitment and Collaboration among FHWA and Partners Leads to Successful Atlantic Salmon Programmatic
    Successes in Stewardship - Commitment and Collaboration among FHWA and Partners Leads to Successful Atlantic Salmon Programmatic
    United States. Federal Highway Administration
    2017-05-01 | PDF
    Successes in Stewardship is a Federal Highway Administration (FHWA) bimonthly newsletter highlighting current best practices in stewardship and environmental review from around the country.
  • Manual on performance of traffic signal systems assessment of operations and maintenance summary
    Manual on performance of traffic signal systems: assessment of operations and maintenance : [summary].
    Stevanovic, Aleksander
    2017-05-01 | PDF
    In this project, Florida Atlantic University researchers developed a methodology and software tools that allow objective, quantitative analysis of the performance of signal systems.The researchers surveyed the state of practice for traffic signal system evaluation through a literature review. Through the review, they documented and described the tr ...
  • Influence of casting conditions on durability and structural performance of HPCAR optimization of selfconsolidating concrete to guarantee homogeneity during casting of long structural elements final report
    Influence of casting conditions on durability and structural performance of HPC-AR : optimization of self-consolidating concrete to guarantee homogeneity during casting of long structural elements : final report.
    Feys, Dimitri ;
    Hernandez, Aida Margarita Ley
    2017-05-01 | PDF
    This report is a summary of the research done on dynamic segregation of self-consolidating concrete (SCC) including the casting of pre-stressed beams at Coreslab Structures. SCC is a highly flowable concrete that spreads into place with little to no mechanical vibration [1]. The high fluidity of the concrete is achieved by the addition of special c ...
  • current status of recycled glass collection and processing in the State of Ohio
    current status of recycled glass collection and processing in the State of Ohio.
    Tao, Junliang
    2017-05-01 | PDF
    Junliang (Julian) Tao, ORCiD: 0000-0002-3772-3099Glass cullet is produced from crushing waste glass collected in municipal and industrial waste streams to a specific size. In Ohio, it is primarily used in new glass container manufacturing. One possible alternative is to use crushed glass in the construction of civil infrastructures. This study was ...
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