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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 4261 - 4280 of 36011 results
  • Research Development Technology Strategic Plan FY 20182022
    Research, Development & Technology Strategic Plan: FY 2018-2022
    United States. Department of Transportation
    2020-10-01 | PDF
    This U.S. Department of Transportation (DOT) Research, Development, and Technology (RD&T) Strategic Plan presents DOT’s transportation research priorities and strategies to support the goals defined in the Department’s Strategic Plan for FY 2018–2022. This RD&T Strategic Plan is an update to the original plan published in 2017.1 This plan meets the ...
  • A SemiFlexible Composite Trackbed Material for Stiffness Transition in Bridge Approaches and Its Application
    A Semi-Flexible Composite Trackbed Material for Stiffness Transition in Bridge Approaches and Its Application
    Shen, Shihui ;
    Yu, Shuai
    2020-09-30 | PDF
    When railroad tracks extend from a subgrade to a bridge, the abrupt variation of the stiffness or track moduli can lead to transition problems. This is mainly due to a major settlement difference of the foundation and can cause a discontinuity of the track structure. If handled inappropriately, these problems would eventually accelerate the degrada ...
  • Impacts of COVID19 on Transportation Engineering Education and Research
    Impacts of COVID-19 on Transportation Engineering Education and Research
    Cheu, Ruey Long ;
    Rincones, Rodolfo
    2020-09-30 | PDF
    In March 2020, the COVID-19 pandemic began to spread in the United States forcing many universities to discourage in-person classes and research meetings. Many faculty members modified their modes of instruction and research activities. This research surveyed transportation faculty members across the United States that focused on the changes in the ...
  • Synthesis Report on the Use and Design of Snow Sheds to Protect Transportation Corridors Against Avalanches
    Synthesis Report on the Use and Design of Snow Sheds to Protect Transportation Corridors Against Avalanches
    Hendrikx, Jordy ;
    Jones, Alan
    2020-09-30 | PDF
    This report provides a synthesis on the use and design of snow sheds to protect transportation corridors against avalanches. This report summarizes the various snow shed designs and standards, regulation environment, construction and operational costs, risk, benefits, loading considerations, operational and design considerations, and alternate meth ...
  • Efficient Service Life Extension of Bridges through Riskbased Lifecycle Management and Highperformance Construction Materials Emphasis on Corrosionresistant Steel
    Efficient Service Life Extension of Bridges through Risk-based Lifecycle Management and High-performance Construction Materials: Emphasis on Corrosion-resistant Steel
    Frangopol, Dan M. ;
    Yang, David Y
    2020-09-30 | PDF
    Corrosion is responsible for structural deterioration of a large number of steel bridges. It can considerably compromise the safety and serviceability of bridges. Inspection and maintenance of corroded structures can lead to huge direct economic cost to bridge owners and significant indirect social and environmental consequences such as traffic del ...
  • Computer Learning and AIBased Investigation of Outward Facing Locomotive Videos for Trespassing Events and Behavior
    Computer Learning and AI-Based Investigation of Outward Facing Locomotive Videos for Trespassing Events and Behavior
    Havens, Timothy ;
    Lautala, Pasi
    2020-09-30 | PDF
    This project explored using the analysis of big data through artificial intelligence (AI) and computer learning (CL) to better understand the leading causes for trespassing incidents. The main data set for the analysis is the images from outward facing cameras located in locomotives. Such data are regularly used for analyzing the events in the case ...
  • Guidance for Installation of Midwest Guardrail System Adjacent to Slopes
    Guidance for Installation of Midwest Guardrail System Adjacent to Slopes
    Bielenberg, Robert W. ;
    Kohtz, Justine E.
    2020-09-29 | PDF
    The report provides general guidance for the installation of the Midwest Guardrail System (MGS) adjacent to slopes. Previous full-scale crash testing of W-beam guardrail adjacent to or on slopes and relevant dynamic bogie testing of posts on or adjacent to slopes was reviewed. Based on that review, general guidance for the use of the MGS with slope ...
  • Railroad Engineering Education Outreach
    Railroad Engineering Education & Outreach
    Schlake, Bryan W ;
    Shen, Shihui
    2020-09-28 | PDF
    Due to high levels of attrition, the railroad industry is in need of trained engineering students who are qualified to fill professional and management roles for railroad, consulting, and supply companies. Penn State Altoona offers the nation’s only four-year Bachelor of Science degree in Rail Transportation Engineering. While this program is growi ...
  • Impacts of Transportation Emissions on the Risk of Mortality Findings From the Literature and Policy Implications
    Impacts of Transportation Emissions on the Risk of Mortality: Findings From the Literature and Policy Implications
    Nadafianshahamabadi, Razieh ;
    Tayarani, Mohammad
    2020-09-17 | PDF
    Background: Exposure to vehicle emissions have been considered a cause of several negative health outcomes including mortality. The existing findings are too inconsistent to drive a well-founded exposure-response function to be fully exploited to curb the negative impacts of transportation systems on public health. In this study, we investigate the ...
  • Discovering Potential Market for the Integration of Public Transportation and Emerging Shared Mobility Services [supporting datasets]
    Du, Lili ;
    Qiu, Jiahua
    2020-09-17 | ZIP
    This project conducted a comprehensive data analysis to answer two questions: 1) Who are the potential demands with high probability to use intermodal services provided by hybrid systems? (Task 1); 2) Where and when are the supply gaps to coordinate public transit services with shared-mobility service? (Task 2). To accomplish these research objecti ...
    Dataset Supporting Files
  • A Moment in Time Senator Al Gore Holds a Hearing
    A Moment in Time: Senator Al Gore Holds a Hearing
    Weingroff, Richard F.
    2020-09-16 | FHWA Highway History Website Articles | PDF
    President Dwight D. Eisenhower is often called the Father of the Interstate System, which since 1990 has been named after him: the Dwight D. Eisenhower National System of Interstate and Defense Highways. He made the program a high priority, worked behind the scenes and in public to promote it, followed its progress during his second term in the Whi ...
  • Feasibility and Implementation of Balanced Mix Design in Nebraska
    Feasibility and Implementation of Balanced Mix Design in Nebraska
    Nsengiyumva, Gabriel Mukristu ;
    Kim, Yong-Rak
    2020-09-15 | PDF
    Balanced mixture design is an alternative asphalt concrete design method that incorporates the performance of mixtures during the design. Balanced mixture design consists of performance test methods and performance criteria. Compared to the existing Superpave design method which mostly relies on volumetrics to design mixtures, balanced mixture desi ...
  • Evaluation of Mixtures and Pavement Performance for Rehabilitation Methods
    Evaluation of Mixtures and Pavement Performance for Rehabilitation Methods
    Rahmani, Mohammad ;
    Nsengiyumva, Gabriel
    2020-09-15 | PDF
    Pavement rehabilitation practice involves milling an asphalt surface and placing a new layer. The incorporation of reclaimed asphalt pavement (RAP) mixtures brings cost savings and preserves the environment and natural resources. However, the use of recycled materials can compromise pavement performance, in particular, RAP can contribute to crackin ...
  • Documenting the Characteristics of Traffic Crashes for RITI Communities in Idaho
    Documenting the Characteristics of Traffic Crashes for RITI Communities in Idaho
    Abdel-Rahim, Ahmed ;
    Swoboda-Colberg, Skye
    2020-09-03 | PDF
    This project documents the characteristics of traffic crashes in rural, isolated, tribal, and indigenous (RITI) communities in Idaho and establishes an in-depth understanding of the baseline traffic safety conditions in RITI communities. Different sources of crash data for RITI communities in Idaho was used to conduct an in-depth ten-year crash ana ...
  • Development and Testing of a Bridge Rail for LowVolume Roads
    Development and Testing of a Bridge Rail for Low-Volume Roads
    Rosenbaugh, Scott K. ;
    DeLone, Jacob A
    2020-09-03 | PDF
    A new steel bridge rail was developed for use on low-volume bridges. The railing consisted 31-in. tall, 12-gauge W-beam guardrail mounted on S3x5.7 posts, which were supported by steel square-tube sockets attached to the side of the bridge deck. The sockets were to be attached to the steel C-channel that is typically placed along the edges of rural ...
  • Is the Transit Industry Prepared for the Cyber Revolution Policy Recommendations to Enhance Surface Transit Cyber Preparedness
    Is the Transit Industry Prepared for the Cyber Revolution? Policy Recommendations to Enhance Surface Transit Cyber Preparedness
    Belcher, Scott ;
    Belcher, Terri
    2020-09-01 | PDF
    The intent of this study is to assess the readiness, resourcing, and structure of public transit agencies to identify, protect from, detect, respond to, and recover from cybersecurity vulnerabilities and threats. Given the multitude of connected devices already in use by the transit industry and the vast amount of data generated (with more coming o ...
  • Summary of Illinois Regulations and Review of Treatment Alternatives for Contaminated Soils in RightofWays
    Summary of Illinois Regulations and Review of Treatment Alternatives for Contaminated Soils in Right-of-Ways
    Hohner, Amanda K. ;
    Pelletier, Austin
    2020-09-01 | PDF
    Industrial activities and vehicular transportation often pollute roadside soils with toxic mixtures of petroleum derivatives, combustion byproducts, and metal contaminants. Of these contaminants, semi-volatile organic compounds and metallic inorganics are commonly present at levels exceeding regulatory limits and require special handling if found i ...
  • Internal Friction Angle of Sands With High Fines Content Research Project Capsule 211GT
    Internal Friction Angle of Sands With High Fines Content: Research Project Capsule [21–1GT]
    Abu-Farsakh, Murad Y.
    2020-09-01 | PDF
    There are three main objectives of this study. The first is to evaluate the effect of fines content on the value of internal friction angle of sand soils mixed with fines typically encountered in Louisiana. The second objective is to evaluate the effect of fines content on the interface friction angle between sand soils mixed with fines and both co ...
  • Forecasting Bicycle Facility Demand
    Forecasting Bicycle Facility Demand
    Machemehl, Randy ;
    Hall, Jenny
    2020-09-01 | PDF
    The objective of this report is to (1) evaluate current and past predictive models that are used for forecasting off-street bicycle facility demand; (2) create a statistical model from locally sourced data that is able to connect bicycle facility counts to time, demographic data, and weather data; (3) conclude if the statistical model can be applie ...
  • Will RideHailing Enhance Mobility for Older Adults A California Survey
    Will Ride-Hailing Enhance Mobility for Older Adults? A California Survey
    Agrawal, Asha Weinstein ;
    Shirgaokar, Manish
    2020-09-01 | PDF
    Ride-hailing services such as Lyft and Uber offer a potential mobility option for the growing numbers of aging Californians who risk social and economic isolation if they cannot drive for health or financial reasons. They could also serve older adults who currently have mobility options but would prefer a ride-hailing alternative for at least some ...
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