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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 1441 - 1460 of 36104 results
  • Counting Airport Operations Using Aircraft Transponder Signals andor Aircraft Automatic Dependent SurveillanceBroadcast ADSB Data
    Counting Airport Operations Using Aircraft Transponder Signals and/or Aircraft Automatic Dependent Surveillance-Broadcast (ADS-B) Data
    Pesce, John ;
    Rashedi, Ramin
    2024-02-01 | PDF
    Accurate estimation of daily and annual aircraft operations at airports is vital for various objectives, including airport planning, funding allocation, and aviation forecasts. However, obtaining precise operational data from airports without control towers has been challenging. In 2018, the Florida Department of Transportation (FDOT) published an ...
  • OSTR Research Roundup Newsletter February 2024
    OST-R Research Roundup Newsletter: February 2024
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2024-02-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • Using the Portable XRF To IdentifyVerify Field Material Properties Technical Summary
    Using the Portable XRF To Identify/Verify Field Material Properties [Technical Summary]
    Liu, Zhen ;
    Cooper, Samuel B.
    2024-02-01 | PDF
    Portable spectroscopy technologies such as X-Ray Fluorescence (XRF) are proposed for a rapid identification of chemical compounds or detection of certain additives or contaminants in some commonly used construction materials in Portland cement concrete, structural coatings, or pavement markings. The ability to provide fast verification in the field ...
  • Traffic Safety Evaluation at Jturns in Minnesota
    Traffic Safety Evaluation at J-turns in Minnesota
    Moreland, Max ;
    Leuer, Derek
    2024-02-01 | PDF
    Between 2010 and 2022, 83 J-turn intersections were installed on Minnesota Department of Transportation (MnDOT) roadways. The J-turn is an alternative intersection layout that is intended to provide safety benefits by limiting the number of points within an intersection that two or more vehicle paths might intersect. Before-after analyses at J-turn ...
  • Feasibility of Composting as an Alternative Disposal Method for Wildlife Vehicle CollisionInduced Carcasses in Colorado Department of Transportation Processes
    Feasibility of Composting as an Alternative Disposal Method for Wildlife Vehicle Collision-Induced Carcasses in Colorado Department of Transportation Processes
    DeMasters, Tim J. ;
    Shields, Maddie F.
    2024-02-01 | PDF
    The Colorado Department of Transportation (CDOT) Region 1 Environmental Unit undertook a pilot project that utilized roadkill carcasses as compost material. Wildlife-vehicle collisions (WVC) are the fourth most common type of vehicle collision crash in Colorado. CDOT maintenance staff are tasked with the removal of carcasses from the roadway to pre ...
  • Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples
    Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples
    Grisales, Alvaro Mendoza ;
    Ferraro, Christopher C.
    2024-02-01 | PDF
    Before specifications can be developed for use of electrical resistivity in quality control programs, potential differences between field- and laboratory-made samples must be quantified. The present research was conducted to provide a better understanding of the effect of each of the factors studied in the variability observed between field-fabrica ...
  • Define a Statewide Plan for a Sustainable RealTime Travel Time Network for Texas Hurricane Evacuations and Safe Citizen Return Project Summary
    Define a Statewide Plan for a Sustainable Real-Time Travel Time Network for Texas Hurricane Evacuations and Safe Citizen Return [Project Summary]
    Boyles, Stephen ;
    Bathgate, Kyle
    2024-01-31 | PDF
    This research study was conducted to assess the existing level of implementation, user preferences for the usage of real-time data, and gaps in the current traffic monitoring system. Understanding these aspects is crucial for determining the effective device deployment strategies, and developing recommendations for monitoring, prioritizing system e ...
  • Curved Integral Abutment Bridge Design Guidelines
    Curved Integral Abutment Bridge Design Guidelines
    Stockin, Adam M ;
    Erickson, Grant E
    2024-01-31 | PDF
    Straight integral abutment bridges have been used throughout the New England states to reduce bridge maintenance costs and extend the service life of structures. Extending integral abutment bridges to curved alignment applications offers bridge owners additional areas to reduce construction costs associated with the lengths of approaches and right- ...
  • An Exploration of the Use of Artificial Intelligence for Enhanced Traffic Management Operations and Safety
    An Exploration of the Use of Artificial Intelligence for Enhanced Traffic Management, Operations and Safety
    Juri, Natalia Ruiz ;
    Perrine, Ken
    2024-01-24 | PDF
    This project explored the use and value of artificial intelligence and machine learning (ML) in transportation taking a multi-pronged approach that includes a literature review, a workshop, a survey, the development of3 prototype ML models for four high-priority use cases, and the field testing of one of the prototyped models. Initial tasks were ex ...
  • Public Awareness on Distracted Driving of CAVs and Evaluating the Distractions
    Public Awareness on Distracted Driving of CAVs and Evaluating the Distractions
    Jeihani, Mansoureh ;
    Javid, Ramina
    2024-01-16 | PDF
    Distracted driving is a major concern in traffic safety, leading to many fatal crashes in the United States in recent years. Every year, distracted driving costs lives. In the U.S., distracted driving claims the lives of nine people per day. With the increasing presence of CAV technologies, there is a corresponding rise in the quantity of auditory ...
  • RAP and RAS in HMA Pilot Project on ELD 49 Material Testing Observations and Findings
    RAP and RAS in HMA Pilot Project on ELD 49: Material Testing, Observations, and Findings
    Harvey, John ;
    Buscheck, Jeffrey
    2024-01-02 | PDF
    A pilot project for the inclusion of recycled asphalt shingles (RAS) in hot mix asphalt (HMA) was built on State Route 49 in El Dorado County in November 2021. Four mixes were included in short test sections: (1) a control mix with no RAS or recycled asphalt pavement (RAP), (2) a typically used mix with 10% RAP that was also used for construction o ...
  • Transportation Benefits and Costs of Reducing Lane Widths on Urban and Rural Arterials
    Transportation Benefits and Costs of Reducing Lane Widths on Urban and Rural Arterials
    Ewing, Reid ;
    Promy, Noshin Siara
    2024-01-01 | PDF
    Reducing the lane width of urban arterials provides space for different street features, whereas selecting the appropriate lane width considering road safety is a concern. The major elements of this research are: a comprehensive literature review investigating the effects narrower travel lanes and other geometric designs have on speed, safety, and ...
  • Evaluating Practical Applications of Unmanned Aerial Vehicles for Traffic Incident Response and Management Research Project Capsule 243SS
    Evaluating Practical Applications of Unmanned Aerial Vehicles for Traffic Incident Response and Management: Research Project Capsule [24–3SS]
    Moomen, Milhan ;
    Rupnow, Tyson
    2024-01-01 | PDF
    The objectives of this research project are: • Assess the feasibility of UAV use in Louisiana’s traffic incident management (TIM) and monitoring • Document issues and challenges in drone use for incident response • Develop an information guide on UAV use for TIM.
  • Investigating Heterogeneity in Private Vehicle Ownership Preferences towards Alternative Fuel Vehicles and Adoption of Shared Mobility Options
    Investigating Heterogeneity in Private Vehicle Ownership, Preferences towards Alternative Fuel Vehicles, and Adoption of Shared Mobility Options
    Iogansen, Xiatian
    ORCID ICON IMG
    2024-01-01 | PDF
    In recent decades, emerging technologies have significantly transformed the transportation sector, offering a wider range of vehicle options and mobility alternatives. However, the recent COVID-19 pandemic disrupted many aspects of daily life, likely leaving long-lasting effects that further complicate our understanding and prediction of individual ...
  • Evaluation and Incorporation of Site and Laboratory Variability into LRFD Design of Pile Foundations Phase 2 Research Project Capsule 233SS
    Evaluation and Incorporation of Site and Laboratory Variability into LRFD Design of Pile Foundations— Phase 2: Research Project Capsule [23–3SS]
    Abu-Farsakh, Murad ;
    Rupnow, Tyson
    2024-01-01 | PDF
    The main objectives of this research are to evaluate the different sources of geotechnical site variability and to quantify the effect of spatial site variability of soil properties; number, type, and quality of lab/in-situ test methods; number and type of pile load tests, location and distribution of soil borings /in-situ test methods, and gap cha ...
  • Modeling the Dynamic Modulus of Asphalt Mixtures Using Singlevalue Test Results Phase II Relation Between E Parameters and CT Index
    Modeling the Dynamic Modulus of Asphalt Mixtures Using Single-value Test Results Phase II: Relation Between E* Parameters and CT Index
    Romero-Zambrana, Pedro ;
    Stevens, David
    2024-01-01 | PDF
    This report outlines the development of relations between the IDEAL-CT test results and the dynamic modulus of asphalt mixtures. In this, the second phase of a four-phase study, the theoretical results obtained as part of Phase I were validated by measuring dynamic modulus and cracking tolerance index values on nine different mixtures; seven of the ...
  • Development of Deterioration Curves for Ohio Bridges Fact Sheet
    Development of Deterioration Curves for Ohio Bridges [Fact Sheet]
    Yoon, Yoojung ;
    Ahamed, Faysal
    2024-01-01 | PDF
    The objective of this research was to develop the deterioration curves of the primary bridge superstructure designs to understand their characteristics over time. The research methodologies involved a meticulous data collection and processing step, analyzing Ohio's historical bridge inventory dating back to the mid-1980s, followed by deterioration ...
  • Development of Deterioration Curves for Ohio Bridges
    Development of Deterioration Curves for Ohio Bridges
    Yoon, Yoojung ;
    Ahamed, Faysal
    2024-01-01 | PDF
    The objective of this research was to develop the deterioration curves of the primary bridge superstructure designs to understand their characteristics over time. The research methodologies involved a meticulous data collection and processing step, analyzing Ohio's historical bridge inventory dating back to the mid-1980s, followed by deterioration ...
  • Digitizing Traffic Control Infrastructure for Autonomous Vehicles AV Technical Report
    Digitizing Traffic Control Infrastructure for Autonomous Vehicles (AV): Technical Report
    Wu, Jason (Dayong) ;
    Miller, Matthew
    2024-01-01 | PDF
    High precision road maps are a crucial component to facilitating autonomous driving techniques. Although current Autonomous vehicles (AVs) rely on vehicular sensing techniques (e.g., camera, light detection and ranging [LiDAR], radar), studies have suggested that creating high-quality road maps with traffic control infrastructures (TCIs) (e.g., tra ...
  • Older Road Users Safety in Louisiana Understanding the Crash Contributing Factors Research Project Capsule 242SA
    Older Road Users Safety in Louisiana: Understanding the Crash Contributing Factors Research: Project Capsule [24–2SA]
    Mitran, Elisabeta ;
    Rupnow, Tyson
    2024-01-01 | PDF
    The objectives of this study are to investigate the factors contributing to older road user crashes in Louisiana and to recommend effective countermeasures to support the SHSP strategies in reducing traffic fatalities and severe injuries.
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