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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 1241 - 1260 of 36049 results
  • 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 ...
  • Fatality Analysis Reporting System Analytical Users Manual 19752022
    Fatality Analysis Reporting System Analytical User’s Manual, 1975-2022
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-04-01 | PDF
    This is the updated and revised Fatality Analysis Reporting System (FARS) Analytical User’s Manual for the period 1975 to 2022. This manual presents the evolution of FARS coding from inception through present. It includes the data elements that are contained in FARS and other useful information that will enable the users to become familiar with the ...
  • Product Material Investigation and Evaluation of Jays Majic Mud for Use in KDOT Construction and Maintenance Applications
    Product Material Investigation and Evaluation of Jay’s Majic Mud for Use in KDOT Construction and Maintenance Applications
    McArtor, Erinn ;
    Broxterman, Brandon
    2024-04-01 | PDF
    Jay’s Majic Mud (JMM) was investigated for possible use as either a rapid-set patching material or as a potential new alternative, novel, thin-bonded overlay system. In its current pre-packaged form, JMM does not meet the requirements for rapid-set material use, nor does it meet the permeability requirements needed for use as a standalone (neat) mi ...
  • Performance Evaluation of Different Detection Technologies for Signalized Intersections in Minnesota
    Performance Evaluation of Different Detection Technologies for Signalized Intersections in Minnesota
    Grossman, Malcolm ;
    Jiao, Yuankun
    2024-04-01 | PDF
    This research evaluates the performance of non-intrusive detection technologies (NITs) for traffic signals in Minnesota. Prior work shows that while no single NIT device performs best in all situations, under specific circumstances, some NIT devices consistently outperform others. Our goal in this research is to find which NIT devices perform bette ...
  • Speed Limits in Texas
    Speed Limits in Texas
    Fitzpatrick, Kay ;
    Venglar, Steven P.
    2024-04-01 | PDF
    Posted speed limits (PSLs) are a highly complex issue involving engineering, human factors, and political and societal concerns. On a national level, recent research along with calls to change how speed limit are set, especially for city streets, have generated extensive discussion on future speed limit setting procedures. Within this TxDOT project ...
  • Guidebook for Project Management
    Guidebook for Project Management
    Asher, Jill ;
    Caudill, Keith
    2024-04-01 | PDF
    For the Kentucky Transportation Cabinet’s (KYTC) Department of Highways, project development encompasses all the work activities needed to move a transportation project from concept and project initiation to construction letting. Developing projects efficiently requires the adoption of sound project management practices. Although KYTC has a long tr ...
  • OSTR Research Roundup Newsletter April 2024
    OST-R Research Roundup Newsletter: April 2024
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2024-04-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • Reducing Vehicle Licensing and Titling Fraud
    Reducing Vehicle Licensing and Titling Fraud
    Brown, Mallory ;
    Martin, Andrew
    2024-04-01 | PDF
    This study reviews Kentucky’s vehicle licensing and registration program, evaluates methods of motor vehicle title fraud, examines current anti-fraud mechanisms in Kentucky, reports on vehicle titling and anti-fraud efforts in other states, assesses Ohio’s vehicle inspection program, and develops a proposal for a new Kentucky rebuilt title inspecti ...
  • PerformanceRelated Specifications for Pavement Milling
    Performance-Related Specifications for Pavement Milling
    Cho, Seonghwan ;
    Moncada, Oscar Andrés
    2024-04-01 | PDF
    The primary objective of this research was to evaluate pavement damage that may occur during the pavement milling process, which is critical to the overlay design and performance of asphalt pavements. To achieve this purpose, the most common milling practices in Indiana were implemented on several trial sections and various damage characterization ...
  • NJDOT Compensation Scan and Retention Study Technical Summary
    NJDOT Compensation Scan and Retention Study [Technical Summary]
    Gaines, Danena
    2024-04-01 | PDF
    With noticeable staff turnover in certain employment classifications, NJDOT engaged Cambridge Systematics (CS) to conduct the Compensation Scan and Retention Study. This scope of work is focused on researching and collecting information on compensation and retention of employees utilized by municipalities and county transportation agencies, private ...
  • VISSIM Simulation Calibration Procedure
    VISSIM™ Simulation Calibration Procedure
    Hunter, Michael ;
    Rodgers, Michael O.
    2024-04-01 | PDF
    Underlying most VISSIM™ calibration is the adjustment of the Wiedemann car following parameters used to simulate vehicle behavior within the model. The Wiedemann models directly influence a roadway segment’s capacity, saturation flow, density, etc. Several key features were identified as part of this study. Through the project a calibration approac ...
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