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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 2721 - 2740 of 35959 results
  • Flexural Capacity of Concrete Elements with Unbonded and Bonded Prestressing
    Flexural Capacity of Concrete Elements with Unbonded and Bonded Prestressing
    Consolazio, Gary R. ;
    Hamilton, H. R. (Trey)
    2022-05-01 | PDF
    Prestressed concrete is widely used in bridge construction and is considered a cost-effective and efficient method of construction. However, durability issues have arisen which have been attributed to poor grouting practice or material performance. To improve durability and facilitate replacement of tendons, bridge construction projects in Florida ...
  • Evaluation of Lightweight Aggregate for Internal Curing on Concrete Pavement in Kansas Technical Summary
    Evaluation of Lightweight Aggregate for Internal Curing on Concrete Pavement in Kansas [Technical Summary]
    Jenkins, Andrew ;
    Meggers, David A.
    2022-05-01 | PDF
    The purpose of this project and the Internally Cured Concrete (ICC) test section was to evaluate the benefits obtained through internal curing using pre-saturated Lightweight Aggregate (LWA). The pavements will be evaluated to determine if there is a significant reduction in permanent panel warping. Permanent panel warping, caused by excessive mois ...
  • Florida Index for Transportation A System of Systems Approach to Understanding the Changing Nature of Transportation Summary
    Florida Index for Transportation: A System of Systems Approach to Understanding the Changing Nature of Transportation [Summary]
    Choi, Juyeong
    2022-05-01 | PDF
    For over 100 years, transportation has increased in scale and complexity at all levels, and that trend continues. People and freight move through networks that include public and private transportation and that accommodate and connect pedestrians, bicycles, automobiles, and trucks with planes, trains, and ships. The planning, funding, and managemen ...
  • Feasibility Analysis of Realtime Intersection Data Collection and Processing Using Drones Summary
    Feasibility Analysis of Real-time Intersection Data Collection and Processing Using Drones [Summary]
    Ozguven, Eren
    2022-05-01 | PDF
    Florida State University researchers examined the feasibility of extracting detailed intersection traffic data from drone videos using computer vision applications.
  • Emerging Transportation Innovations Promises and Pitfalls
    Emerging Transportation Innovations: Promises and Pitfalls
    Labi, Samuel ;
    Sinha, Kumares C.
    2022-05-01 | PDF
    Rapid growth in information and communication technologies has spawned a number of major innovations in transportation area, including automation and connectivity. At the same time, the advancement in battery technology has accelerated the electrification of transportation vehicle propulsion. This paper, focusing on highway-oriented surface transpo ...
  • Accelerated Corrosion Testing of Grouts for PostTensioning Steel Strand Summary
    Accelerated Corrosion Testing of Grouts for Post-Tensioning Steel Strand [Summary]
    Florida. Department of Transportation
    2022-05-01 | PDF
    Florida International University researchers assessed modifications of standard grout testing methods using purposely deficient grout to connect deficiencies with corrosion potential and to identify testing protocols that can help mitigate corrosion potential.
  • 100 Recycled Mixtures Using Hot InPlace Recycling HIR and Cold InPlace Recycling CIR
    100% Recycled Mixtures Using Hot In-Place Recycling (HIR) and Cold In-Place Recycling (CIR)
    Huang, Baoshan ;
    Ma, Yuetan
    2022-05-01 | PDF
    The increasing costs of asphalt binder and aggregates have put much pressure on the highway maintenance budgets. Pavement managers are seeking alternative cost-effective approaches to rehabilitate the roads. In-place recycling techniques, including hot in-place recycling (HIR) and cold in-place recycling (CIR), encouraged consuming 100% RAP from th ...
  • Developing a Plan for Using Unmanned Aerial Vehicles for Traffic Operations Applications in Virginia
    Developing a Plan for Using Unmanned Aerial Vehicles for Traffic Operations Applications in Virginia
    Alden, Andrew S. ;
    Park, Hyoshin
    2022-05-01 | PDF
    State departments of transportation are utilizing unmanned aircraft systems (UAS) in a variety of applications that support planning, construction, maintenance, and operations within their jurisdictions. As the use of UAS to support road-trafficrelated applications is currently limited by a host of technical, regulatory, and operational issues, fur ...
  • Evaluation of Lightweight Aggregate for Internal Curing on Concrete Pavement in Kansas
    Evaluation of Lightweight Aggregate for Internal Curing on Concrete Pavement in Kansas
    Jenkins, Andrew ;
    Meggers, David A.
    2022-05-01 | PDF
    The purpose of this project and the Internally Cured Concrete (ICC) test section was to evaluate the benefits obtained through internal curing using pre-saturated lightweight aggregate (LWA). Two test sections were constructed on the mainline of US-54 near Iola, Kansas: a Control section and an ICC section using lightweight aggregate. Traditional l ...
  • Teen Distracted Driver Data Teens and Distracted Driving 2021
    Teen Distracted Driver Data: Teens and Distracted Driving 2021
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2022-05-01 | National Transportation Statistics (NTS) | PDF
    The National Highway Traffic Safety Administration works to reduce the occurrence of distracted driving and raise awareness of its dangers. This risky behavior poses a danger to vehicle occupants as well as pedestrians and pedalcyclists. Driver distraction is a specific type of driver inattention. Distraction occurs when drivers divert their attent ...
  • Feasibility of 3D Printing Applications for Highway Infrastructure Construction and Maintenance
    Feasibility of 3D Printing Applications for Highway Infrastructure Construction and Maintenance
    Hart, John A ;
    Chen, Wen
    2022-05-01 | PDF
    In recent years there has been a significant increase of the interest in additive manufacturing (AM; also frequently referred to as 3D printing), yet AM is largely unexplored within infrastructure projects. By harnessing the new capabilities of AM, researchers have managed to access unprecedented new design capabilities and operational flexibility ...
  • Improving Multimodal Traffic Safety for MultiLane Arterials
    Improving Multimodal Traffic Safety for Multi-Lane Arterials
    Abdel-Aty, Mohamad ;
    Ugan, Jorge
    2022-05-01 | PDF
    In the previous tasks we have conducted extensive analysis by the driving simulator and data analytics studies to validate the effects of speed management countermeasures on speed and non-motorist safety. The driving simulator tested the effects of Rectangle Rapid Flashing Beacon (RRFB), Pedestrian Hybrid Beacon (PHB), and speed feedback sign on sp ...
  • Development of a Resilience Index for the Florida Surface Transportation System
    Development of a Resilience Index for the Florida Surface Transportation System
    Choi, Juyeong ;
    Abdelrazig, Yassir
    2022-05-01 | PDF
    Transportation resilience has a multifaceted nature, which requires analyzing various factors across multiple domains (i.e., technical, social, economic, and environmental) for evaluation. However, existing resilience indicators, which are based mainly on the physical conditions of transportation assets, are not comprehensive enough to provide info ...
  • Develop Refine and Validate a Survey to Assess Adults Perspectives of Autonomous RideSharing Services Summary
    Develop, Refine, and Validate a Survey to Assess Adult’s Perspectives of Autonomous Ride-Sharing Services [Summary]
    Classen, Sherrilene
    2022-05-01 | PDF
    Autonomous vehicles (AVs) have generated great excitement for the future of transportation. The promise of self-driving vehicles offers a valuable transportation option to those who do not drive, own a car, or are exploring how to get around their community without driving. For older adults, AVs might provide a vital link to shopping, entertainment ...
  • Investigating the Resilience of Accessibility to Emergency and Lifesaving Facilities under Natural Hazards
    Investigating the Resilience of Accessibility to Emergency and Lifesaving Facilities under Natural Hazards
    Wang, Chih-Hao ;
    Chen, Na
    2022-05-01 | PDF
    Studying accessibility, including the resilience of city transportation networks, is critical to understand how these networks influence individuals’ mobility and lives. This study developed an analytical research framework to examine the resilience of accessibility to emergency and lifesaving facilities under the threats of natural hazards such as ...
  • Development of DroneAssisted Pavement Profile Mapping NearSurface Void Detection Application
    Development of Drone-Assisted Pavement Profile Mapping: Near-Surface Void Detection Application
    Irizarry, Javier ;
    Rakha, Tarek
    2022-05-01 | PDF
    Monitoring and performance-verification activities of roadway maintenance are labor-intensive tasks and prone to errors. The adoption of unmanned aerial system (UAS) technologies provides an opportunity to improve upon these tasks. This study had the goals of: (1) developing a drone-assisted workflow for pavement maintenance-related tasks, (2) deve ...
  • Traffic Safety Facts Research Note Distracted Driving 2020
    Traffic Safety Facts Research Note: Distracted Driving 2020
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2022-05-01 | National Transportation Statistics (NTS) | PDF
    The National Highway Traffic Safety Administration works to reduce the occurrence of distracted driving and raise awareness of its dangers. This risky behavior poses a danger to vehicle occupants as well as pedestrians and pedalcyclists. Driver distraction is a specific type of driver inattention. Distraction occurs when drivers divert their attent ...
  • MEPDG Climate Data Input for the State of Tennessee
    MEPDG Climate Data Input for the State of Tennessee
    Onyango, Mbakisya ;
    Owino, Joseph
    2022-05-01 | PDF
    The Pavement Mechanistic Empirical Design (PMED) method was developed to address shortcomings experienced on the AASHTO Guide for Design of Pavement Structures (1993) including environmental/climate considerations. However, the implementation of PMED requires a large number of design inputs that characterize materials, traffic, and climatic conditi ...
  • Drones and Other Technologies To Assist in Disaster Relief Efforts
    Drones and Other Technologies To Assist in Disaster Relief Efforts
    Li, Shuai ;
    Moslehy, Amirsalar
    2022-05-01 | PDF
    Tennessee faces many threats from natural disasters such as storm, flooding, landslide, and earthquake, which damage civil infrastructure and cause major service interruptions. The application of emerging technologies such as drones, sensing technologies, machine learning methods, and optimization techniques in disaster preparedness, response, and ...
  • Sunshine Skyway Bridge Monitoring Phase II System Development Summary
    Sunshine Skyway Bridge Monitoring Phase II: System Development [Summary]
    Florida. Department of Transportation
    2022-05-01 | PDF
    University of Florida researchers developed a Web interface which centralizes the systems monitoring the Sunshine Skyway Bridge. They also analyzed long-term bridge data to establish the bounds of typical bridge behavior and made recommendations for an alert response plan when data indicate out-of-bounds behavior.
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