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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 3001 - 3020 of 36873 results
  • Acoustic Effectiveness of Vinyl Fence Noise Walls Fact Sheet
    Acoustic Effectiveness of Vinyl Fence Noise Walls [Fact Sheet]
    Burton, Kimberly ;
    Agarwal, Ruchi
    2022-07-01 | PDF
    There are currently a variety of materials from which noise walls can be constructed, but there has been limited research on vinyl noise walls, so this project studied the acoustic, aesthetic, and cost benefits of vinyl materials to guide future noise mitigation implementation strategies. The research team studied vinyl noise walls to determine if ...
  • Characterization of Unbound Materials for MechanisticEmpirical Pavement Design for NDOT Districts 2 and 3
    Characterization of Unbound Materials for Mechanistic-Empirical Pavement Design for NDOT Districts 2 and 3
    Sebaaly, Peter E. ;
    Othman, Omar
    2022-07-01 | PDF
    The resilient modulus is a critical engineering property used to characterize the unbound and subgrade materials in the AASHTO Mechanistic Empirical Pavement Design Guide (MEPDG) where a hierarchical approach is followed. Three levels of input are specified in the AASHTOWare® Pavement ME design software. This includes direct measurement from the la ...
  • Innovation to Implementation Collaborative Forums To Boost ResearchBased Solutions to Transformational Technology and Innovation
    Innovation to Implementation: Collaborative Forums To Boost Research-Based Solutions to Transformational Technology and Innovation
    Camp, Janey ;
    Ivey, Stephanie
    2022-07-01 | PDF
    Technology is changing rapidly in this world, especially with regards to transportation. Recent advancements have potential to significantly change transportation system design, operations, and management in Tennessee and beyond. Additionally, innovation and “out of the box” thinking is contributing to improved workflows and more efficient processe ...
  • Development of Guidelines for Inspection Repair and Use of Portable Concrete BarriersVolume 2 Crash Report
    Development of Guidelines for Inspection, Repair, and Use of Portable Concrete Barriers—Volume 2: Crash Report
    Dobrovolny, Chiara Silvestri ;
    Schroeder, William J. L
    2022-07-01 | PDF
    The purpose of the tests reported herein was to assess the performance of the damaged portable concrete barrier according to the safety-performance evaluation guidelines included in the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware (MASH), Second Edition. The crash tests were performed in ac ...
  • Addressing Bicyclist Safety Through the Development of Crash Modification Factors for Bikeways
    Addressing Bicyclist Safety Through the Development of Crash Modification Factors for Bikeways
    Dadashova, Bahar ;
    Dixon, Karen
    2022-07-01 | PDF
    According to the Texas Department of Transportation Crash Record Information System database, there have been 26,148 crashes involving bicyclists (pedal cyclists) from 2010 to 2018 in Texas, resulting in 2,885 fatalities and suspected serious injuries and 22,937 non-incapacitating and possible injuries. Overall, bicycle crashes, as well as fatal an ...
  • Internal Reinforcement of Backfill Behind Integral Bridge Abutments To Mitigate Approach Slab Distresses
    Internal Reinforcement of Backfill Behind Integral Bridge Abutments To Mitigate Approach Slab Distresses
    Han, Jie ;
    Liu, Hao
    2022-07-01 | PDF
    Integral abutment bridges have become popular worldwide by eliminating movable shoes which are expensive to purchase, install, and maintain in conventional bridges. However, the behavior of bridge abutments subjected to air temperature changes for integral bridges is different from that of conventional bridges. Expansion and contraction of bridge g ...
  • Incorporation of Stated Preference and Revealed Preference Methods in Regional Travel Survey Programs Final Report
    Incorporation of Stated Preference and Revealed Preference Methods in Regional Travel Survey Programs: Final Report
    Asmussen, Katherine ;
    Dannemiller, Katherine A.
    2022-07-01 | PDF
    Transportation plans must consider the inevitable introduction of new emerging technology and must be able to assess the impacts of proposed transportation policies and large-scale infrastructure projects. To address this need, it is important to incorporate SP questions within travel surveys. This project demonstrated state-of-the-art SP technique ...
  • Mode Shift Potential Evaluations Using Desire Lines Connections to Active Functional Classification Systems
    Mode Shift Potential Evaluations Using Desire Lines & Connections to Active Functional Classification Systems
    Wasserman, David ;
    Young, Grace
    2022-07-01 | PDF
    Understanding which active transportation facilities have a high potential for mode shift is a potent metric of success for funders seeking to make high-impact transportation investments. This report documents the development and validation of a traveler alignment analysis tool that looks at the orientation and magnitude of short trips in origin-de ...
  • Shear Friction Capacity of Corrugated Pipe Connection in Precast Footings
    Shear Friction Capacity of Corrugated Pipe Connection in Precast Footings
    Vieira, Fatima ;
    Garber, David
    2022-07-01 | PDF
    Prefabricated Bridge Elements and Systems (PBES) are being more widely used, as they can significantly reduce on-site construction time impacting traffic. The main concerns when using PBES are the final assembly of the elements, type of connection between them, and tolerance to allow for field fit up. The Florida Department of Transportation (FDOT) ...
  • Nevada State Plan for Electric Vehicle Infrastructure Deployment
    Nevada State Plan for Electric Vehicle Infrastructure Deployment
    Nevada. Department of Transportation
    2022-07-01 | PDF
    The Bipartisan Infrastructure Law, formally enacted as the Infrastructure Investment and Jobs Act, dedicates $5 billion in formula funding for electric vehicle (EV) charging infrastructure, including $5.6 million for Nevada in fiscal year 2022. The Nevada Department of Transportation (NDOT) has led the development of this Nevada State Plan for Elec ...
  • Field Performance of Asphalt Pavements at Low and Intermediate Temperatures
    Field Performance of Asphalt Pavements at Low and Intermediate Temperatures
    Romero, Pedro
    2022-07-01 | PDF
    Asphalt mixtures were collected from seven field projects and distributed to different laboratories to determine their potential for cracking. Samples were prepared in the lab for testing at two conditions: low, in-service temperatures using the bending beam rheometer device based on AASHTO TP-125 and intermediate temperature using the Illinois Fle ...
  • Automating the Implementation of the Updated Grade Severity Rating System GSRS for Wyoming Mountain Passes
    Automating the Implementation of the Updated Grade Severity Rating System (GSRS) for Wyoming Mountain Passes
    Ampadu, Vincent- Michael K ;
    Haq, Muhammad Tahmidul
    2022-07-01 | PDF
    Truck crashes on steep downgrades caused by excessive brake heating is an ongoing concern for the Wyoming Department of Transportation (WYDOT). Crashes resulting from brake failure on downgrades cause a devastating toll on lives and property. To counter such crashes, WYDOT initiated a research project in 2016 to update a previous Grade Severity Rat ...
  • Assessing Eretailers Resilience During the COVID19 Pandemic
    Assessing E-retailer’s Resilience During the COVID-19 Pandemic
    Jaller, Miguel ;
    Pahwa, Anmol
    2022-07-01 | PDF
    The COVID-19 pandemic led to a significant breakdown of the traditional retail sector, resulting in a substantial surge in ecommerce demand for the delivery of essential goods. The e-retailers coped with this surge in demand, albeit while operating at a much lower level of service than usual, by outsourcing part of their operations through: crowdso ...
  • Analyzing the Use and Impacts of Oakland Slow Streets and Potential Scalability Beyond Covid19
    Analyzing the Use and Impacts of Oakland Slow Streets and Potential Scalability Beyond Covid-19
    Douglas, Gordon ;
    Moore, David
    2022-07-01 | PDF
    This report presents the results of a mixed-methods study of the 2020-2022 Oakland Slow Streets program. An official response to the Covid-19 pandemic, the program used signs and temporary barricades to limit thru-traffic on 21 miles of city streets to create more and safer space for walking, cycling, and outdoor recreation. Researchers collected d ...
  • Sustainability Plan July 2022
    Sustainability Plan: July 2022
    United States. Department of Transportation. Office of the Secretary of Transportation
    2022-07-01 | PDF
    Executive Order (E.O.) 14057 details the President’s bold and ambitious vision for the federal government — using a whole of government approach and the power of procurement to achieve net-zero emissions economy-wide by 2050. Critical goals include transitioning to zero emission vehicles (ZEVs) and energy efficient, net-zero emissions buildings, bo ...
  • Forecasting Freight Logistic Needs and INDOT Plans
    Forecasting Freight Logistic Needs and INDOT Plans
    Iyer, Ananth V ;
    Brady, Tom
    2022-07-01 | PDF
    This project focused on forecasting freight logistics needs and developing and analyzing capacity plans for the Indiana Department of Transportation (INDOT) to consider. The forecast timeframe ranges from the 2020 to 2045; the commodities considered are those used in the Federal Highway Administration (FHWA) framework. The authors considered five S ...
  • Environmental Impacts of Potassium Acetate as a Road Salt Alternative University of Minnesota
    Environmental Impacts of Potassium Acetate as a Road Salt Alternative (University of Minnesota)
    Gulliver, John S. ;
    Chun, Chan Lan
    2022-07-01 | PDF
    Road salt (NaCl) is used predominantly across the state for winter road anti-icing (as brine) and de-icing (as a solid) operations. Road salt is used because it is inexpensive and effective, but the thousands of tons used annually have resulted in increasing chloride concentrations of surface water bodies throughout Minnesota. In many cases, chlori ...
  • Traffic Safety Facts 2020 Data RuralUrban Comparison of Motor Vehicle Traffic Fatalities
    Traffic Safety Facts 2020 Data: Rural/Urban Comparison of Motor Vehicle Traffic Fatalities
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2022-07-01 | PDF
    In 2020, there were 15,033 (42%) fatal traffic crashes in rural areas resulting in 16,665 (43%) traffic fatalities. There were 20,233 (57%) fatal traffic crashes in urban areas resulting in 21,650 (56%) traffic fatalities. Fatalities in rural areas increased by 2 percent from 16,288 in 2019 to 16,665 in 2020, and in urban areas increased by 9 perce ...
  • Domestic Airline Fares Consumer Report First Quarter 2022 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: First Quarter 2022 Passenger and Fare Information
    United States. Department of Transportation
    2022-07-01 | Domestic Airline Fares Consumer Report | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • Phase II Investigation and Guidelines for Best Practices of Mass Concrete Construction Management
    Phase II – Investigation and Guidelines for Best Practices of Mass Concrete Construction Management
    Cho, Yong Kwon ;
    Gentry, Russell
    2022-07-01 | PDF
    The objective of this research is to improve and validate the mass concrete thermal management methods (e.g., passive or active cooling) and decision-making tools developed from the Phase I research (Investigation and Guidelines for Mass Concrete Construction Management) against the Georgia Department of Transportation’s (GDOT’s) real-world mass co ...
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