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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 6121 - 6140 of 36049 results
  • Improvement of Climate Data for Use in MEPDG Calibration and Other Pavement Analysis
    Improvement of Climate Data for Use in MEPDG Calibration and Other Pavement Analysis
    Durham, Stephan A. ;
    Cetin, Bora
    2019-01-01 | PDF
    This study compares the predicted distresses of asphalt concrete (AC) and jointed plain concrete pavement (JPCP) using four different climate data sources: (1) ground-based weather station (GBWS) data, (2) the North American Regional Reanalysis (NARR) data, and (3 and 4) the Modern-Era Retrospective Analysis for Research and Applications (MERRA) ve ...
  • parkDC Penn QuarterChinatown Pricing Pilot Final Report
    parkDC: Penn Quarter/Chinatown Pricing Pilot Final Report
    Pochowski, Alek ;
    Sanders, Meredyth
    2019-01-01 | PDF
    The parkDC: Penn Quarter/Chinatown Multimodal Value Pricing Pilot used the Penn Quarter/Chinatown neighborhoods of Washington, DC as a laboratory to test state-of-the-art strategies to make it easier to find a parking space. The project provided real-time parking-availability information so customers could spend less time searching and changed park ...
  • Evaluation of the Ohio Department of Transportations Current Storm Sewer Cleaning Operations Phase II
    Evaluation of the Ohio Department of Transportation's Current Storm Sewer Cleaning Operations – Phase II
    Schneider, William H. ;
    Cutright, Teresa
    2019-01-01 | PDF
    The Ohio Department of Transportation (ODOT) is in charge of constructing, maintaining and ensuring the safety of roads within its control. Proper maintenance procedures are critical in reducing the amount of funding required to sustain long lasting and safe roads. One maintenance responsibility of ODOT is to inspect and clean the storm sewer infra ...
  • Intersection on Horizontal Curves Problems and Potential Solutions Research Project Capsule 184SA
    Intersection on Horizontal Curves: Problems and Potential Solutions: Research Project Capsule [18–4SA]
    Sun, Xiaoduan ;
    Rupnow, Tyson
    2019-01-01 | PDF
    The objectives of this project are to quantify safety performance of intersections on curves for Louisiana’s state- and locally-owned roads, determine the magnitude of the problem, identify risk factors or roadway characteristics associated with related crashes, and develop a list of possible countermeasures that target the identified risk factors.
  • Effective Production Rate Estimation Using Construction Daily Work Report Data Phase 1
    Effective Production Rate Estimation Using Construction Daily Work Report Data [Phase 1]
    Jeong, H. David ;
    Le, Chau
    2019-01-01 | PDF
    Accurate and practical production rate estimates are crucial for an accurate forecast of contract completion time. As costs of highway projects increase with time, the importance of estimating highway construction contract time has increased significantly, thereby emphasizing the need for effective production rates due to the interrelatedness betwe ...
    Supporting Files
  • Improving the Accuracy and Applicability of Kansas Traffic Data
    Improving the Accuracy and Applicability of Kansas Traffic Data
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2019-01-01 | PDF
    This research investigated the accuracy and reliability of KC Scout traffic sensors in the Kansas City metropolitan area. The locations and sensors under investigation are of particular importance to the Kansas Department of Transportation (KDOT) because they regularly report accurate traffic counts to the Federal Highway Administration (FHWA). The ...
  • Transit in the Era of Shared Mobility
    Transit in the Era of Shared Mobility
    Watkins, Kari E. ;
    McDonald, Noreen
    2019-01-01 | PDF
    There are several conflicting trends in the rapidly changing transportation market, which are impacting transit ridership is varying ways. Transportation Network Companies have the potential to reduce or replace the need for auto ownership and may serve some populations better than transitional transit services, but limited survey research indicate ...
  • Modeling Bioenergy Supply Chains Feedstocks Pretreatment Integrated System Design under Uncertainty
    Modeling Bioenergy Supply Chains: Feedstocks Pretreatment, Integrated System Design under Uncertainty
    Li, Yuanzhe
    2019-01-01 | PDF
    Biofuels have been promoted by governmental policies for reducing fossil fuel dependency and greenhouse gas emissions, as well as facilitating regional economic growth. Comprehensive model analysis is needed to assess the economic and environmental impacts of developing bioenergy production systems. For cellulosic biofuel production and supply in p ...
  • Compliance with the United States Environmental Protection Agency Effluent Limitation Guidelines Turbidity Control and Surface Outlets
    Compliance with the United States Environmental Protection Agency Effluent Limitation Guidelines – Turbidity Control and Surface Outlets
    Privette III, Charles V ;
    Sawyer, Calvin
    2019-01-01 | PDF
    A goal of this research was to maximize turbidity reduction using passive polyacrylamide (PAM) applications and investigate the longevity of PAM’s effectiveness. Results indicate PAM application may provide an effective alternative for turbidity reduction where SCDOT sites discharge to waterways with sediment-related water quality standards in plac ...
  • Field Implementation of SuperWorkable FiberReinforced Concrete for Infrastructure Construction Research Summary
    Field Implementation of Super-Workable Fiber-Reinforced Concrete for Infrastructure Construction: Research Summary
    Missouri. Department of Transportation. Construction and Materials Division
    2019-01-01 | PDF
    A fiber-reinforced super-workable concrete (FR-SWC) made with 0.5% micro-macro steel fibers and 5% CaO-based expansive agent was selected for the new deck slab reconstruction of Bridge A8509. The selected FR-SWC had a targeted slump flow of 20 in. at the casting location. Multiple trial batches were performed, in collaboration with the concrete sup ...
  • Best Practices for Placing Concrete Overlays on Prestressed Slab Bridges
    Best Practices for Placing Concrete Overlays on Prestressed Slab Bridges
    Amde, A M ;
    Sharma, S.
    2019-01-01 | PDF
    The objective of this research was to identify alternatives to the Maryland Department of Transportation State Highway Administration’s (MDOT SHA's) procedure of placing cast-in-place concrete overlays on prestressed bridge decks. The current practice involves the application of a cement-sand slurry mix over the bridge deck prior to placement of ov ...
  • Simplified and Standardized Seismic Design and Detailing for Alabama Bridges
    Simplified and Standardized Seismic Design and Detailing for Alabama Bridges
    Marshall, Justin D. ;
    Broderick, Joseph
    2019-01-01 | PDF
    Simplification and standardization of the seismic design processes for typical Alabama bridges has been investigated and developed in this research. A number of design tools have been developed to reduce the analysis complexity and time demands on bridge designers. These tools can be used to simplify and standardize the seismic design process due t ...
  • WisDOT Research Program 2019 Annual Report
    WisDOT Research Program: 2019 Annual Report
    Wisconsin. Department of Transportation
    2019-01-01 | PDF
    This is a report of research and technology transfer activities carried out by the Wisconsin Department of Transportation through the Part 2 research portion of the State Planning and Research Program of the Federal Highway Administration, U.S. Department of Transportation. The report describes activities during Federal Fiscal Year 2019, covering O ...
  • Assessment of Construction Points for Grade Control and Reference in 3D
    Assessment of Construction Points for Grade Control and Reference in 3D
    Cho, Yong Kwon ;
    Park, Jisoo
    2019-01-01 | PDF
    The objective of this research is to investigate the causes of inaccuracies of grade elevations from current practices and identify best practices for grade control and referencing on transportation infrastructure construction projects in Georgia. A nationwide questionnaire survey was conducted with contractors, engineers, surveyors, and owners, an ...
  • Florida Access Management Benchmarking Study Summary
    Florida Access Management Benchmarking Study [Summary]
    Williams, Kristine M
    2019-01-01 | PDF
    University of South Florida researchers conducted a study to compare Florida’s access management programs to those of comparable states and with current best practices for context-sensitive access management.
  • Driver Compliance at Enhanced Pedestrian Crossings in Utah
    Driver Compliance at Enhanced Pedestrian Crossings in Utah
    Fayyaz, Kiavash ;
    Schultz, Grant G.
    2019-01-01 | PDF
    Since its creation, the Utah Department of Transportation (UDOT) has made safety its number one priority. Over a decade ago, UDOT began implementing technological enhancements to reduce the fatality rate of pedestrians involved in crashes. However, there is a need to evaluate the effectiveness of these enhancements. This study evaluates the safety ...
  • Successes in Stewardship The EcoLogical Approach Helps Accelerate Project Delivery and Improve Environmental Outcomes
    Successes in Stewardship - The Eco-Logical Approach Helps Accelerate Project Delivery and Improve Environmental Outcomes
    United States. Federal Highway Administration
    2019-01-01 | 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.
  • Updated Guidebook Using Public Transportation to Facilitate Last Mile Package Delivery
    Updated Guidebook: Using Public Transportation to Facilitate Last Mile Package Delivery
    Elgart, Zachary ;
    Miller, Kristi
    2019-01-01 | PDF
    This guidebook provides public transit agencies in rural Texas communities with the information necessary to implement a package delivery service in coordination with a private package delivery partner. Chapter 1 introduces the guidebook, describes its purpose, describes the opportunity to provide package delivery via rural transit, and documents f ...
  • NearRoadway Air Pollution Evaluation of Fine Particulate Matter PM25 and Ultrafine Particulate Matter PM01 in Interior Alaska
    Near-Roadway Air Pollution: Evaluation of Fine Particulate Matter (PM2.5) and Ultrafine Particulate Matter (PM0.1) in Interior Alaska
    Aggarwal, Srijan ;
    Kadir, Abdul
    2019-01-01 | PDF
    This report presents a study of fine (PM2.5) and ultrafine (PM0.1) particles in the Fairbanks North Star Borough (FNSB) in Interior Alaska, with specific emphasis on the relationship of ultrafine particles (UFPs) to vehicular traffic. Chapter 1 provides a summary of published literature on particulates in air from vehicular emissions. Chapter 2 pro ...
  • Evaluation of the LongTerm Performance and Benefit of Using an Enhanced MicroMilling Resurfacing Method GDOT 1320
    Evaluation of the Long-Term Performance and Benefit of Using an Enhanced Micro-Milling Resurfacing Method [GDOT 13-20]
    Tsai, James (Yichang) ;
    Wang, Zhaohua
    2019-01-01 | PDF
    The Georgia Department of Transportation (GDOT) has applied the environmentally friendly and cost-effective pavement preservation method, micro-milling and thin overlay, to Georgia’s interstate highways since 2007. The objectives of this project were to critically assess the long-term performance of micro-milling and thin overlay and to quantitativ ...
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