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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 1621 - 1640 of 36873 results
  • Dynamic Prediction of Shared Micromobility Usage with MultiTask Learning Brief
    Dynamic Prediction of Shared Micromobility Usage with Multi-Task Learning [Brief]
    Guo, Yujie ;
    Zhang, Yu
    2024-05-01 | PDF
    Taxis and Transportation Network Companies (TNCs) are important components of the urban transportation system. An accurate short-term forecast of passenger demand can help operators better allocate taxi or TNC services to achieve supply-demand balance in real time. As a result, drivers can improve the efficiency of passenger pick-ups, thereby reduc ...
  • Developing Performance Specifications for HighPerformance Concrete Project Summary
    Developing Performance Specifications for High-Performance Concrete [Project Summary]
    Mukhopadhyay, Anol ;
    Saraswatula, Pravin
    2024-04-30 | PDF
    The main objective of this project was to develop HPC performance specifications to ensure adequate durability performance matching with exposure conditions.
  • Habitat Credit Program for PollinatorsMonarchs
    Habitat Credit Program for Pollinators/Monarchs
    Mahan, Carolyn G.
    2024-04-29 | PDF
    We examined daylight and paired non-daylight sites at 12 locations in central Pennsylvania to determine if daylighting had secondary benefits to native plants and pollinators. Daylight sites had significantly more species of native flowering forbs and shrubs than non-daylight sites. However, daylight sites also harbored significantly more species o ...
  • Development of CostEffective RapidSetting Concrete for Improved Bridge Joint Performance
    Development of Cost-Effective Rapid-Setting Concrete for Improved Bridge Joint Performance
    Dave, Eshan V. ;
    Sias, Jo E
    2024-04-17 | PDF
    Vermont Agency of Transportation has adopted use of the accelerated bridge construction (ABC) approach to deliver bridge construction and reconstruction projects. While ABC projects enjoy high material quality due to a large fraction of precast and prefabricated elements, connections between these elements must be placed in-situ. These are often tr ...
  • Developing a Lower Modulus Polymer Resin Binder Systems Specifications for High Friction Surface Treatment HFST on Asphalt Pavements in Nevada
    Developing a Lower Modulus Polymer Resin Binder Systems Specifications for High Friction Surface Treatment (HFST) on Asphalt Pavements in Nevada
    Shah, Ayesha ;
    Youngblood, Jeffrey P
    2024-04-09 | PDF
    A variety of physical property measurements were performed including Dynamic Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA), compression testing, tensile testing, heat deflection temperature (HDT) testing, and Coefficient of Thermal Expansion (CTE) testing. Results showed a wide range of properties of the resins. Lab scale applicatio ...
  • Economic Development Impact of ODOT Funding on Public Roadways Fact Sheet
    Economic Development Impact of ODOT Funding on Public Roadways [Fact Sheet]
    Duncan, Chandler ;
    Humagain, Prasanna
    2024-04-01 | PDF
    While the Ohio Department of Transportation (ODOT) has several models that quantify the economic benefits and impacts of its investments, the Economic Development Impact Tool (EDIT) is the unique product of national research in market access, development capacity, and historical economic performance. A review of national literature and existing ODO ...
  • Possible Methodology for Probabilistic Assessment of Bridge Safety Against Collisions
    Possible Methodology for Probabilistic Assessment of Bridge Safety Against Collisions
    Silva, Pedro F ;
    Dong, Pan
    2024-04-01 | PDF
    This report presents a possible stochastic methodology that can be used in identifying bridges with greater probability of failure from vehicular collisions. To meet this objective, this report first outlines the design of bridges against these collisions in the United States and compares against the Eurocode design methodology. Existing experiment ...
  • Safety and User Perceptions of Auxiliary Bike Lanes
    Safety and User Perceptions of Auxiliary Bike Lanes
    Hurwitz, David ;
    Jashami, Hisham
    2024-04-01 | PDF
    This research studied Oregon drivers’ and cyclists’ conceivability of and receptivity to bike turnouts (auxiliary bike lanes). The driver and cyclist survey consisted of 32 and 35 questions, respectively, all of which were fixed choice, except for 3 open-ended response questions. The surveys were distributed online to 612 Oregon residents, made up ...
  • Construction Work Zone Safety SpatioTemporal Analysis of Construction Work Zone Crashes
    Construction Work Zone Safety: Spatio-Temporal Analysis of Construction Work Zone Crashes
    Mashhadi, Ali Hassandokht ;
    Rashidi, Abbas
    2024-04-01 | PDF
    This report presents a comprehensive analysis of work zone safety considering multiple factors, including crash severity, speed analysis, countermeasure analysis, and state-of-the-practice in DOTs. It encompasses a broad literature review, drawing from DOT reports, NCHRP publications, MUTCD guidelines, and academic research, to explore a range of t ...
  • Network Screening on LowVolume Roads Using Risk Factors
    Network Screening on Low-Volume Roads Using Risk Factors
    Huda, Kazi Tahsin ;
    Al-Kaisy, Ahmed
    2024-04-01 | PDF
    This paper proposes a new method for network screening on rural low-volume roads. These roads are important as they provide critical access to agricultural land and tourist attractions. Most low-volume roads belong to the lowest functional class (local rural roads) and thus are built to lower design standards. Conventional hot spot network screenin ...
  • Use of Recycled Asphalt Pavement in Rubberized Hot Mix Asphalt Gap Graded
    Use of Recycled Asphalt Pavement in Rubberized Hot Mix Asphalt — Gap — Graded
    Mateos, Angel ;
    Harvey, John T
    2024-04-01 | PDF
    Current Caltrans Standard Specifications for rubberized hot mix asphalt–gap-graded (RHMA-G) do not allow the inclusion of reclaimed asphalt pavement (RAP). This report summarizes the research conducted by the UCPRC in support of the Caltrans-industry initiative “10% RAP in RHMA-G,” whose goal is to evaluate the use of up to 10% RAP (by aggregate re ...
  • Effects of Road Collisions on the Travel Behavior of Vulnerable Groups Expert Interview Findings
    Effects of Road Collisions on the Travel Behavior of Vulnerable Groups: Expert Interview Findings
    Bhuiya, Md. Musfiqur Rahman ;
    Barajas, Jesus M.
    2024-04-01 | PDF
    We interviewed eight subject-matter experts in California in 2023 to understand how travel behavior and priorities may change in response to direct experience with road collisions. Experts represented a variety of perspectives, including medical doctors, advocates for active transportation safety, and advocates for people with disabilities. Their d ...
  • Lessons Learned from Abroad Potential Influence of California HighSpeed Rail on Economic Development Land Use Patterns and Future Growth of Cities
    Lessons Learned from Abroad: Potential Influence of California High-Speed Rail on Economic Development, Land Use Patterns, and Future Growth of Cities
    Loukaitou-Sideris, Anastasia ;
    Circella, Giovanni
    2024-04-01 | PDF
    This study discusses the potential economic and development impacts that high-speed rail (HSR) may bring to California. The research reviews the reported impacts of HSR implementation in various countries, particularly in Europe, and case studies of selected HSR station-cities in France, Spain, and Italy. The analysis suggests that HSR could bring ...
  • Effect of Increased Precipitation Heavy Rain Events on Minnesota Pavement Foundations
    Effect of Increased Precipitation (Heavy Rain Events) on Minnesota Pavement Foundations
    Jibon, Md ;
    Sourav, Md Abdullah All
    2024-04-01 | PDF
    The Midwest region of the United States, including Minnesota, has been experiencing an increase in the number of heavy precipitation events. Historical precipitation data confirmed an increasing trend of heavy precipitation in Minnesota in the 21st century. This study focused on assessing the impact of heavy-precipitation events on moisture levels ...
  • Bats and Bridges Integrating Biology and CloudBased Modeling
    Bats and Bridges: Integrating Biology and Cloud-Based Modeling
    Perez-Jimenez, Janette ;
    Koch, Jacob
    2024-04-01 | PDF
    Accurately predicting bat use of bridges is an important need for planning of bridge repair and maintenance. However, less than 1% of bridges in Ohio have been surveyed for bats, limiting the inferences that can be drawn from existing data and modelling tools. We developed a method for passive camera surveys of bat use of bridges and reevaluated OD ...
  • Analysis of Lateral Spreading Effects on Bridge Foundations
    Analysis of Lateral Spreading Effects on Bridge Foundations
    Qiu, Zhijian ;
    Lu, Jinchi
    2024-04-01 | PDF
    This research is directed towards enhancements to the assessment and mitigation of liquefaction induced lateral spreading effects on bridge foundation systems. The conducted research scope and outcomes are presented. On this basis, insights are derived for improvement of the current assessment procedures, and mitigation of this detrimental mechanis ...
  • Validation of the New Speed Zoning Method for Urban Arterials and HighSpeed Roadways in Terms of Speed Compliance and Safety Outcomes
    Validation of the New Speed Zoning Method for Urban Arterials and High-Speed Roadways in Terms of Speed Compliance and Safety Outcomes
    Anderson, Jason C.
    ORCID ICON IMG
    2024-04-01 | PDF
    This study presents the results of an analysis on the effects of Oregon’s speed zoning method on speed compliance and safety outcomes. Speed zones were selected in an urban area based on the availability of before and after speed data. Data for roadway context was collected, which included population, equity, land use, roadway, and exposure charact ...
  • CulvertStorm Drain Evaluation Technologies
    Culvert/Storm Drain Evaluation Technologies
    Wahlen, Randy ;
    Perrin, Joe
    2024-04-01 | PDF
    While LiDAR (light detection and ranging) is not a new technology to UDOT, mobile LiDAR has not been used to enhance culvert inspections. The study reviewed two types of mobile scanning technologies for testing culverts, Pocket LiDAR (iPhone 12 Pro based laser emitter that is used to improve accuracy of photogrammetry) and SLAM LiDAR (simultaneous ...
  • Prediction Model of VibrationInduced Settlement Due to Pile Driving Summary
    Prediction Model of Vibration-Induced Settlement Due to Pile Driving [Summary]
    Jones, Larry ;
    Hyun, Boo
    2024-04-01 | PDF
    This research project sought to better understand the mechanisms of pile driving-induced ground vibrations in loose to medium-loose soils. Additionally, the research team sought to develop a method for predicting ground deformations caused by impact pile driving, specifically for the characteristics of Central Florida soil conditions.
  • Economic Development Impacts of ODOT Funding on Public Roadways
    Economic Development Impacts of ODOT Funding on Public Roadways
    Duncan, Chandler ;
    Humagain, Prasanna
    2024-04-01 | PDF
    While the Ohio Department of Transportation (ODOT) has several models that quantify the economic benefits and impacts of its investments, the Economic Development Impact Tool (EDIT) is the unique product of national research in market access, development capacity, and historical economic performance. A review of national literature and existing ODO ...
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