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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 7901 - 7920 of 36151 results
  • Friction Surface Treatment Selection Aggregate Properties Surface Characteristics Alternative Treatments and Safety Effects
    Friction Surface Treatment Selection: Aggregate Properties, Surface Characteristics, Alternative Treatments, and Safety Effects
    Li, Shuo ;
    Xiong, Rui
    2017-07-01 | PDF
    This study aimed to evaluate the long term performance of the selected surface friction treatments, including high friction surface treatment (HFST) using calcined bauxite and steel slag, and conventional friction surfacing, in particular pavement preservation treatments such as chip seal, microsurfacing, ultrathin bonded wearing course (UBWC), and ...
  • nvPM Emission Database Compilation Analysis and Predictive Assessment The Pennsylvania State University GE US Aviation
    nvPM Emission Database Compilation, Analysis and Predictive Assessment: The Pennsylvania State University, GE U.S. Aviation
    Vander Wal, Randy L.
    2017-07-01 | PDF
    Aviation black carbon (BC) emissions impact climate and health. Inventory estimates are essential to quantify these effects. These in turn require a means of estimating BC emission indices from jet aircraft. The recently developed Formation and Oxidation (FOX) method removes the need for and hence uncertainty associated with (SNs), required of earl ...
  • Economic Analysis of Vegetation Management Practices
    Economic Analysis of Vegetation Management Practices
    Martin, James B. ;
    Bhadury, Joyendu
    2017-07-01 | PDF
    The purpose of this study was to conduct a thorough evaluation of the mechanical, chemical and cultural components of all vegetation management operations and their governing organizational structures to determine cost-effective practices and efficient administrative procedures and structures. The research problem being investigated is how to reduc ...
  • Longitudinal Joint Repair Best Practices for the Ohio Department of Transportation
    Longitudinal Joint Repair Best Practices for the Ohio Department of Transportation
    Duncan, Gregory M. ;
    Sibaja, Luis V.
    2017-07-01 | PDF
    The Ohio Department of Transportation (ODOT) has identified longitudinal joint (LJ) failure of existing hot-mix asphalt (HMA) paving as a systemic weakness in the structure of some asphalt surfaces. In the past, these joint failures were treated as if they were potholes, and maintenance staff used either hot or cold patching materials for their rep ...
  • Best Management Practices and Incentives to Expedite Utility Relocation Final Report
    Best Management Practices and Incentives to Expedite Utility Relocation: Final Report
    El-Rayes, Khaled ;
    Liu, Liang Y.
    2017-07-01 | PDF
    The relocation of utilities often causes delays to the completion of highway projects in Illinois and other states. These delays often result in delayed project completion and reopening of closed roads, and increased design and construction costs. This report presents the findings of a research project funded by the Illinois Center for Transportati ...
  • Design and Evaluation of Scour for Bridges Using HEC18 technical brief
    Design and Evaluation of Scour for Bridges Using HEC-18 : technical brief.
    Schuring, John R. ;
    Shah, Pragna
    2017-07-01 | PDF
    This project developed a new approach for evaluating erosive scour at New Jersey bridges over non-tidal waterways. The main deliverable was the Scour Evaluation Model (SEM), which offers new analysis procedures, while still retaining the applicable parts of HEC-18. The overall goal is to improve public safety and to expend bridge repair funds more ...
  • Portland Cement Concrete Material Characterization for Pavement ME Design Implementation in Idaho
    Portland Cement Concrete Material Characterization for Pavement ME Design Implementation in Idaho
    Rangelov, Milena ;
    Nassiri, Somayeh
    2017-07-01 | PDF
    The objective of this research project was to develop a concrete material database as the first step towards the implementation of Pavement ME for rigid pavement design in the state of Idaho. Eight concrete mixtures from five of Idaho Transportation Department (ITD) districts were reproduced at Washington State University’s laboratory using the loc ...
  • Comprehensive Investigation of Visibility Problems on Highways Developing Real Time Monitoring and Prediction System for Reduced Visibility and Understanding Traffic and Human Factors Implications
    Comprehensive Investigation of Visibility Problems on Highways: Developing Real Time Monitoring and Prediction System for Reduced Visibility and Understanding Traffic and Human Factors Implications
    Rodgers, Michael O. ;
    Wilson, Alana M.
    2017-07-01 | PDF
    Instances of fog or fog enhanced with smoke (non-photochemical smog) routinely reduce driver visibility on roadways throughout Georgia. Georgia has the fifth highest reduced-visibility–associated crash frequency of any state. This report provides an overview of fog formation and types of fog, and a review of previous studies that have examined the ...
  • Active Work Zone Safety Using Emerging Technologies 2017
    Active Work Zone Safety Using Emerging Technologies 2017.
    Marks, Eric ;
    Vereen, Stephanie C.
    2017-07-01 | PDF
    Highway construction work zones are hazardous environments characterized by a dynamic and limited work space. A host of interactions between workers, passing commuter vehicles, and moving construction equipment occurs in highway work zones fostering dangerous situations which can result in an injury or fatality. Active strategies such as the deploy ...
  • Industrial Land and Jobs Study for the San Francisco Bay Area
    Industrial Land and Jobs Study for the San Francisco Bay Area
    Chapple, Karen
    ORCID ICON IMG
    2017-07-01 | PDF
    Growth in recent decades has put pressure on industrial land owners to convert prime areas along the waterfront to residential and office uses, despite vacancy rates of just five percent. As of the late 2000s, 38% of industrial land in selected Bay Area sub-regions was already planned for new office, residential, or mixed uses. Although demand from ...
  • Guidelines for the Use of Synthetic Fluid Dust Control Palliatives on Unpaved Roads
    Guidelines for the Use of Synthetic Fluid Dust Control Palliatives on Unpaved Roads
    Barnes, David ;
    Connor, Billy
    2017-07-01 | PDF
    The amount of small soil particles, dust, lost from typical unpaved roads to fugitive dust is staggering. A 1 km stretch of unpaved road can contribute over 2400 kg of dust to the atmosphere (4.2 ton/mile) in a typical 3-month summer season. Road managers typically manage dust from unpaved roads with various dust-control palliatives, which are effe ...
  • An Intercomparative Study of the Effects of Aircraft Emissions on Surface Air Quality
    An Intercomparative Study of the Effects of Aircraft Emissions on Surface Air Quality
    Cameron, MA ;
    Jacobson, M. Z.
    2017-07-01 | PDF
    his study intercompares, among five global models, the potential impacts of all commercial aircraft emissions worldwide on surface ozone and particulate matter (PM2.5). The models include climate-response models (CRMs) with interactive meteorology, chemical-transport models (CTMs) with prescribed meteorology, and models that integrate aspects of bo ...
  • Socioeconomic Implications of Largescale Electric Vehicle Systems
    Socio-economic Implications of Large-scale Electric Vehicle Systems
    Tatari, Omer
    2017-07-01 | PDF
    Transportation is a complex, technology-intensive socio-technical system, which needs to be tackled in an integrated manner. Also, transportation as a sector is a significant component of any national economy, and has far-reaching implications both with regard to socio-economic and environmental well-being of the society and within the context of s ...
  • Successes in Stewardship Back to the Basics Bridge Permitting
    Successes in Stewardship - Back to the Basics: Bridge Permitting
    United States. Federal Highway Administration
    2017-07-01 | 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.
  • Analysis of Local Bus Markets Volumes I III Technical Brief
    Analysis of Local Bus Markets – Volumes I – III, Technical Brief
    Deka, Devajyoti
    2017-07-01 | PDF
    NJ TRANSIT runs bus operations on more than 250 routes throughout New Jersey. Buses on such a large number of routes are expected to have an effect on both traffic congestion and GHG emissions since many of the current riders would have traveled by automobile if buses on these routes did not operate. Although NJ TRANSIT periodically conducts onboar ...
  • Feasibility study of a campusbased bikesharing program at UNLV final report
    Feasibility study of a campus-based bikesharing program at UNLV : final report.
    Teng, Hualiang (Harry) ;
    Kutela, Boniphace
    2017-07-01 | PDF
    Bikesharing systems have been deployed worldwide as a transportation demand management strategy to encourage active modes and reduce single-occupant vehicle travel. These systems have been deployed at universities, both as part of a city program or as a stand-alone system, to serve for trips to work, as well as trips on campus. The Regional Transpo ...
  • Strategic Scheduling of Infrastructure Repair and Maintenance Volume 2 Developing ConditionBased Triggers for Bridge Maintenance and Rehabilitation Treatments
    Strategic Scheduling of Infrastructure Repair and Maintenance: Volume 2 - Developing Condition-Based Triggers for Bridge Maintenance and Rehabilitation Treatments
    Zhang, Zhibo ;
    Labi, Samuel
    2017-07-01 | PDF
    Even for the right treatment, improper timing can have consequences: premature application (treatment is applied too early) could mean wasteful spending even if users enjoy the benefits of higher pavement condition; deferred or delayed application (treatment is applied too late) could result in higher user costs due to poor condition and even reduc ...
  • SelfConsolidating Concrete for Prestressed Bridge Girders
    Self-Consolidating Concrete for Prestressed Bridge Girders
    Seo, Junwon ;
    Torres, Eduardo
    2017-07-01 | PDF
    This document reports the findings of a research project designed to better understand material and structural performance of prestressed bridge girders made with Self-Consolidating Concrete (SCC) from Wisconsin. SCC has high potential to be used for prestressed bridge girder construction due to exceptional workability and strength. However, many l ...
  • Guardrail and Bridge Rail Recommendations for Very LowVolume Local Roads in Kansas Addendum to Include Bridges Up to 100 Feet Long and Traffic Volume Up to 100 Vehicles Per Day Technical Summary
    Guardrail and Bridge Rail Recommendations for Very Low-Volume Local Roads in Kansas: Addendum to Include Bridges Up to 100 Feet Long and Traffic Volume Up to 100 Vehicles Per Day: Technical Summary
    Seitz, Ronald J. ;
    Salfrank, Tod
    2017-07-01 | PDF
    In 2014, the Kansas Department of Transportation undertook a study, entitled “Guardrail and Bridge Rail Recommendations for Very Low-Volume Local Roads in Kansas” (Report No. KS-14-16, Seitz & Salfrank, 2014), to establish practical risk-based guidelines and policies for bridge rails and guardrails on low-volume local roads in the state. The purpos ...
  • Phase I Evaluation of Low Flexural Strength for Northern Nevada Concrete Paving Mixtures
    Phase I: Evaluation of Low Flexural Strength for Northern Nevada Concrete Paving Mixtures
    Duffala, Nicole ;
    Stempihar, Jeff
    2017-07-01 | PDF
    Production paving grade concrete in Northern Nevada having acceptable strength is universally acknowledged to be difficult; however understanding why this is true remains elusive. Current practice is to meet flexural strength requirements by using mixtures with high cementitious materials contents and low water/cement ratios (w/cm), which can negat ...
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