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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 4521 - 4540 of 36020 results
  • An Assessment of the Workforce and Occupations in the Highway Street and Bridge Construction Industries in Indiana
    An Assessment of the Workforce and Occupations in the Highway, Street, and Bridge Construction Industries in Indiana
    Kumar, Indraneel ;
    Beaulieu, Lionel
    2020-07-01 | PDF
    This project explores workforce and occupations within the highway, street, and bridge construction industries (NAICS 237310) i Indiana. There are five specific deliverable comprised of three data reports, one policy document, and a website. The first data report includes an assessment of the workforce based on the eight-part framework, which are i ...
  • LongTerm Impacts of Shared Connected Automated and EMobility in New York State Exploring Hubs of Mobility and Energy Innovation
    Long-Term Impacts of Shared, Connected, Automated, and E-Mobility in New York State: Exploring Hubs of Mobility and Energy Innovation
    Kamga, Camille ;
    Mudigonda, Sandeep
    2020-07-01 | PDF
    Disruptive changes in mobility services are emerging across the nation and in New York State that have the potential to further enable private car-optional lifestyles and expanded, more flexible and affordable mobility choices. By convening stakeholder engagement roundtables of advanced transportation experts, then utilizing available data for visu ...
  • The Relationship Between General Aviation Pilot Age and Accident Rate
    The Relationship Between General Aviation Pilot Age and Accident Rate
    Riaz, Raja Muhammad ;
    Naeem, Khawar
    2020-07-01 | PDF
    The purpose of this study is to assess the relationship between the number of accidents and pilot’s age. The pilot considered for this study is General Aviation Pilot. Normal distribution of the accidents shows the mean pilot’s age <MEAN age> = 54.60 with S. Dage = 14.38. There is a non-linear relationship between pilot’s age and accident rate and ...
  • LongTerm Performance of Asphalt Concrete Mixed with RAP and RAS
    Long-Term Performance of Asphalt Concrete Mixed with RAP and RAS
    Bahia, Hussain ;
    Zhang, Yuan
    2020-07-01 | PDF
    The objective of this project is to evaluate the short- and long-term aging performance of high RAP and RAS asphalt mixtures utilizing various recycling additives (“rejuvenators”) in the context of balanced mixture design. Mixtures were evaluated for workability using gyratory compactor derived parameters, rutting and moisture susceptibility using ...
  • TechnoEconomic Analysis of Implementing Hybrid Electric Utility Vehicles in Municipal Fleets
    Techno-Economic Analysis of Implementing Hybrid Electric Utility Vehicles in Municipal Fleets
    Northrop, Will ;
    Zarling, Darrick
    2020-07-01 | PDF
    This research quantified fuel economy improvements by implementing hybrid electric utility vehicles in municipal fleets. The research team analyzed utility vehicle data and built computer vehicle simulations of utility trucks with three powertrain types: conventional, charge sustaining hybrid, and charge depleting hybrid plug-in hybrid vehicle (PHE ...
  • Life Cycle Costs and Benefits Analysis of Freight Transportation Projects
    Life Cycle Costs and Benefits Analysis of Freight Transportation Projects
    Peng, Zhong-Ren ;
    Han, Yu
    2020-07-01 | PDF
    Freight plays an increasing role in the national, state, and local economy. However, the life-cycle costs and benefits of freight investments are difficult to quantify, and there is a lack of specific tools to evaluate the potential benefits of freight investment projects. In this research, we developed and implemented a methodology to evaluate lif ...
  • Virtual Reality Implementation for Public Engagement
    Virtual Reality Implementation for Public Engagement
    Olson, Kimball
    2020-07-01 | PDF
    This project linked a Virtual Reality (VR) experience to the Iowa DOT’s general driver safety messaging campaign and delivered this powerful combination to the general public at the Iowa DOT’s 2018 Iowa State Fair booth and other venues. Two immersive VR displays were created: “Work Zone Safety” (by Intrans/Iowa State University’s Virtual Reality A ...
  • Airport Pavement Paint Study Implementation Evaluation
    Airport Pavement Paint Study - Implementation & Evaluation
    Baumann, Sandra ;
    Gorham, John
    2020-07-01 | PDF
    Staining of airfield markings is a safety problem. On airport pavement, white paint markings indicate that the pavement is a runway; yellow paint indicates the pavement is a taxiway or aircraft parking apron. Maintaining this difference in color is critical for the safety of all airport users. Iron, which is present in the sand and stone (aggregate ...
  • Social MediaInformed Urban Crisis Detection
    Social Media-Informed Urban Crisis Detection
    Samuels, Rachel ;
    Mohammadi, Neda
    2020-07-01 | PDF
    This research project examines the potential utility of a social media-informed crisis detection system to aid GDOT in the identification of hazards across the state. To assess that utility, the research team first analyzed two case studies with the goal of identifying the relevant information contained within posted social media data. Case study d ...
  • Verification of Bridge Foundation Design Assumptions and Calculations
    Verification of Bridge Foundation Design Assumptions and Calculations
    Han, Fei ;
    Prezzi, Monica
    2020-07-01 | PDF
    The Sagamore Parkway Bridge consists of twin parallel bridges over the Wabash River in Lafayette, IN. The old steel-truss eastbound bridge was demolished in November 2016 and replaced by a new seven-span concrete bridge. The new bridge consists of two end-bents (bent 1 and bent 8) and six interior piers (pier 2 to pier 7) that are founded on closed ...
  • Review and Assessment of Past MnDOT Bridge Barrier Types
    Review and Assessment of Past MnDOT Bridge Barrier Types
    Williams, William F. ;
    Moran, Sana M
    2020-07-01 | PDF
    Many Minnesota bridges have older barriers or parapets that met the design code at the time of construction in the 1950s. Many of these bridge barriers no longer meet current strength and performance requirements of NCHRP Report 350 or the Manual for Assessing Safety Hardware (MASH). As the Minnesota Department of Transportation (MnDOT) begins to r ...
  • Phase 3 MnDOT Slope Vulnerability Assessments
    Phase 3 MnDOT Slope Vulnerability Assessments
    Holmstadt, Jen ;
    Bradley, Nick
    2020-07-01 | PDF
    Phase 3 Slope Vulnerability Assessments is a continuation of Phases 1 and 2 previously conducted by WSB and MnDOT to determine the risk of slope failure along state highways. This phase includes 27 counties located in MnDOT districts 1, 2, 3, and 4. The three main components of the model are 1) identify past slope failures, 2) model the causative f ...
  • CUTR Transportation Webcast Series
    CUTR Transportation Webcast Series
    Lewis, Stephanie
    2020-07-01 | PDF
    Since 2010, the Center for Urban Transportation Research (CUTR) has hosted the biweekly CUTR Transportation Webcast Series and has completed a total of 178 webinars. The webinars were scheduled every other Thursday at 12pm (ET) to accommodate attendee participation from across the country and provide a standing appointment for when webinars occurre ...
  • Performance Based Planning Research Final Summary Report
    Performance Based Planning Research – Final Summary Report
    Kittelson & Associates
    2020-07-01 | PDF
    The Alaska Department of Transportation & Public Facilities (DOT&PF) retained Kittelson & Associates, Inc. to research national best practices related to project prioritization for Statewide Improvement Programs and apply them to the National Highway Performance Program (NHPP) funded National Highway System (NHS) project prioritization process. The ...
  • California Department of Transportation Caltrans Highway Design Manual US Customary Units Seventh Edition
    California Department of Transportation (Caltrans): Highway Design Manual: U.S. Customary Units: Seventh Edition
    California. Department of Transportation
    2020-07-01 | PDF
    The 7th Edition Highway Design Manual (HDM) establishes uniform policies and procedures to carry out the state highway design functions of the California Department of Transportation. Refer to the "Foreword" section of the HDM for more information. When a chapter is updated, the date on the header of the updated pages is changed and a vertical line ...
  • Residual Strength of FullDepth Reclamation
    Residual Strength of Full-Depth Reclamation
    Torres-Machi, Cristina ;
    Beesam, Vishwa Vignan
    2020-07-01 | PDF
    Cold recycling technologies such as Full-Depth Reclamation (FDR) are sustainable and cost-effective techniques for pavement rehabilitation. Previous research has found current mechanistic-empirical (M-E) default values to be non-representative and overly conservative, leading to an underestimation of the true performance capabilities of FDR materia ...
  • Great Lakes Hyperloop Feasibility Study
    Great Lakes Hyperloop Feasibility Study
    Transportation Economics & Management Systems, Inc (TEMS)  ...
    2020-07-01 | PDF
    First envisioned by entrepreneur Elon Musk as a high-speed alternative to other modes of transportation, the Hyperloop consists of large-scale vacuum tubes with magnetic-levitation tracks that can carry capsules with passengers and/or cargo at speeds of up to 760 mi/h.On February 26, 2018, the Northeast Ohio Areawide Coordinating Agency (NOACA) and ...
  • Construction and Design Soil Property Correlation
    Construction and Design Soil Property Correlation
    Fragomeni, Cara ;
    Hedayat, Ahmadreza
    2020-07-01 | PDF
    The main goal of this research study was to develop correlations among R-value, resilient modulus, and soil’s basic properties for available AASHTO soil types in databases in Colorado. In this study, an extensive database of systematically conducted resilient modulus and R-value tests along with the basic soil properties for Colorado soils was esta ...
  • Performance Evaluation of Highway Slopes on Yazoo Clay
    Performance Evaluation of Highway Slopes on Yazoo Clay
    Khan, Mohammad Sadik ;
    Amini, Farshad
    2020-06-30 | PDF
    Slope failures are frequent in highway embankments on expansive Yazoo clay in Mississippi due to frequent seasonal rainfall events associated with temperature and humidity variation causing expensive maintenance problems for the Mississippi Department of Transportation (MDOT). This State Study 286 was conducted to understand the performance of high ...
  • Air Pollution and Equity Impacts of the Proposed Tampa Bay Next Program From a Health in All Policies Perspective
    Air Pollution and Equity Impacts of the Proposed Tampa Bay Next Program From a Health in All Policies Perspective
    Kocak, Talha ;
    Menon, Nikhil
    2020-06-30 | PDF
    The impacts on air pollution and health equity of Tampa Bay Next, an ongoing transportation planning program in the Tampa area, were investigated in this study. Part 1 of this report describes simulations performed using a high-resolution modeling system to estimate changes in pollutant emissions, concentrations, population exposures, and exposure ...
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