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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 4961 - 4980 of 36020 results
  • Evaluating Freight Intermodal Connectors FICs in Tennessee
    Evaluating Freight Intermodal Connectors (FICs) in Tennessee
    Chimba, Deo
    2020-02-01 | PDF
    Freight Intermodal Connectors (FICs), which are also known as “first mile/last mile roadways”, are roadway segments that link freight logistic hubs or freight-intensive land uses to main freight routes. This project focused on segments, corridors and intersections that connect Tennessee freight trucks to/from the major freeways from/to high‐priorit ...
  • Implementation of DownHole Geophysical Testing For Rock Sockets
    Implementation of Down-Hole Geophysical Testing For Rock Sockets
    Hiltunen, Dennis R. ;
    Zou, Jian
    2020-02-01 | PDF
    The objective of the project was to produce a prototype instrument and software analysis system for conducting geophysical characterization of subsurface conditions from within a single borehole. In Task 1, Borehole Instrument, two piezoelectric sources were constructed, the first using high frequency piezocylinders and the second using a barrel st ...
  • Asphalt Mixture Design and Performance Properties by Using a Gyratory Compactor
    Asphalt Mixture Design and Performance Properties by Using a Gyratory Compactor
    Huang, Baoshan ;
    Polaczyk, Pawel Andrzej
    2020-02-01 | PDF
    TDOT is currently using the Marshall mix design method for designing asphalt mixtures. However, the Marshall method does not allow for designing larger stone mixes and it hinders the technical information exchange and communication among DOTs. To compare the Marshall and Superpave mix design methods and recommend an improved mix design method for T ...
  • Early Detection of NearSurface Void Defects in Concrete Pavement Using DroneBased Thermography and GPR Methods
    Early Detection of Near-Surface Void Defects in Concrete Pavement Using Drone-Based Thermography and GPR Methods
    Shen, Zhigang ;
    Erdogmus, Ece
    2020-01-31 | PDF
    The goal of this research is to evaluate the feasibility and the performance of using UAV-mounted infrared thermography (IRT) and ground penetration radar (GPR) to detect sub-surface voids caused by consolidation issues in concrete pavement. The motivation of the study is to identify the consolidation defects as early as the initial set of concrete ...
  • Evaluation of Autonomous Vehicles and Smart Technologies for Their Impact on Traffic Safety and Traffic Congestion
    Evaluation of Autonomous Vehicles and Smart Technologies for Their Impact on Traffic Safety and Traffic Congestion
    Miles, James ;
    Strybel, Thomas
    2020-01-31 | PDF
    Over the next several decades, highly automated driving systems (HADS) will become increasingly common on our roads, greatly reducing traffic accidents and road congestion. However, for the foreseeable future, the human driver will be required to take control when automation fails. Therefore, it is critical to understand how take-overs from HADS af ...
  • Replication Data for: Evaluation of Autonomous Vehicles and Smart Technologies for Their Impact on Traffic Safety and Traffic Congestion [supporting datasets]
    Miles, James ;
    Strybel, Thomas
    2020-01-31 | PDF
    Our research generated demographic, survey, and behavior data related to driver performance on a simulated highway environment. Data was collected from 36 individuals, that were predominantly undergraduate and graduate students at California State University Long Beach. All identifying information has been removed from the data. Specifically, data ...
    Dataset Supporting Files
  • DeepLearning Traffic Flow Prediction for Forecasting Performance Measurement of Public Transportation Systems
    Deep-Learning Traffic Flow Prediction for Forecasting Performance Measurement of Public Transportation Systems
    Shahabi, Cyrus ;
    Tran, Luan
    2020-01-31 | PDF
    In this project, we developed a deep learning approach for traffic flow forecasting and bus arrival time estimation in Los Angeles. First, we developed a novel Graph Convolutional Recurrent Neural Network (GCRNN) to model and forecast traffic flows at different spatial and temporal resolutions. Our GCRNN model considers not only the location of tra ...
  • Realtime Integration of Arrow Board Messages Into Traveler Information Systems Evaluation
    Real-time Integration of Arrow Board Messages Into Traveler Information Systems Evaluation
    Roelofs, Tina ;
    Schroeder, Jeremy L.
    2020-01-21 | PDF
    In 2018, the Minnesota Department of Transportation (MnDOT) conducted a one year pilot project through a contract with a vendor (Street Smart) that installed a monitoring device on 20 arrow boards that provided arrow board status information (e.g. right arrow on, left arrow on) to the vendor’s server. The arrow board status information from the ser ...
  • A Connected Vehicle-Based Adaptive Navigation Algorithm [supporting dataset]
    Wang, Yinhai
    ORCID ICON IMG
    2020-01-16 | ZIP
    The dataset contains the vehicle count by movement information for 35 intersections in Bellevue, WA. It can be used for network-wide traffic simulation. The data were collected in 2017, during an off-peak (1 pm) period in a normal weekday. The Turn_ratio.xlsx file contains intersection identification numbers and vehicle count for each movement. The ...
    Dataset Supporting Files
  • MultiCriteria DecisionMaking Approach for Building Resilient and Sustainable Transportation Infrastructure
    Multi-Criteria Decision-Making Approach for Building Resilient and Sustainable Transportation Infrastructure
    Puppala, Anand J. ;
    Bheemasetti, Tejo V
    2020-01-15 | PDF
    This project developed and validated a multi criteria decision making approach for enhancing the longevity of pavement infrastructure built on problematic expansive soils. Expansive soils swell and shrink with changes in moisture content, causing pavements to crack or heave. As of current state of practice, more than 25 state transportation agencie ...
  • Building a National Transportation Data Preservation Network Workshop poster
    Building a National Transportation Data Preservation Network Workshop [poster]
    Christiansen, Leighton L ;
    Ducker Jr., Charles R
    2020-01-14 | PDF
    In early 2019, USDOT sponsored a workshop titled: Building a National Transportation Data Preservation Network. The event brought together thirteen librarians, researchers, repository managers, and others involved in data management efforts to discuss feasibility, rewards, and challenges to building a network or consortium of trustworthy repositori ...
  • Feasibility Study and Assessment of Communications Approaches for Real-Time Traffic Signal Applications Study [supporting datasets]
    United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office (ITSJPO)  ...
    2020-12-30 | ZIP
    This dataset contains Signal Phasing and Timing (SPaT), MAP, and Basic Safety Messages (BSM) data from the "Feasibility Study and Assessment of Communications Approaches for Real-Time Traffic Signal Applications" project in the hexadecimal string and pcap formats. The project characterizes and assesses the feasibility of SPaT messages for infrastru ...
    Dataset Supporting Files
  • 2019 Federal Radionavigation Plan
    2019 Federal Radionavigation Plan
    Esper, Mark ;
    Chao, Elaine L.
    2020-01-10 | Federal Radionavigation Plan | PDF
    The Federal Radionavigation Plan (FRP) is the official source of positioning, navigation, and timing (PNT) policy and planning for the Federal Government. It is required by the National Defense Authorization Act for Fiscal Year (FY) 1998, as published under Title 10 United States Code, Section 2281, paragraph (c) (10 USC 2281(c)). The FRP is prepar ...
  • Locations for Future Intercity Passenger Rail Maintenance or Layover Facilities in CA
    Locations for Future Intercity Passenger Rail Maintenance or Layover Facilities in CA
    Chandra, Shailesh ;
    Rahmani, Mehran
    2020-01-06 | PDF
    Maintenance and layover facilities are vital in operating and maintaining passenger rail systems. This research project is interested in the decision-making criteria for locating such facilities and how those criteria impact the performance of the rail system. This research project looks at the locations and the types of most recently-built rail ma ...
  • Improvement of Low Traffic Volume Gravel Roads in Nebraska
    Improvement of Low Traffic Volume Gravel Roads in Nebraska
    Liao, Yijun ;
    Mohammadi, Mohammad Ebrahim
    2020-01-01 | PDF
    In the state of Nebraska, over one-third of roadways are unpaved, and consequently require a significant amount of financial and operational resources to maintain their operation. Undesired behavior of surface gravel aggregates and the road surfaces can include rutting, corrugation, and ponding that may lead to reduced driving safety, speed or netw ...
  • Effects of Box Culverts on Stream Habitat Channel Morphology and Fish and Macroinvertebrate Communities at Selected Sites in South Carolina 201618
    Effects of Box Culverts on Stream Habitat, Channel Morphology, and Fish and Macroinvertebrate Communities at Selected Sites in South Carolina, 2016–18
    Journey, Celeste A. ;
    Riley, Jeffrey W.
    2020-01-01 | PDF
    Much attention has been placed on the role that under-roadway culverts may have in inhibiting upstream fish movement because of altered hydrology and unsuitable conditions for accessing or swimming through the culvert. Other culvert effects related to habitat alterations or disturbance to macroinvertebrate communities have received relatively littl ...
  • Modeling Driver Behavior and Aggressiveness Using Biobehavioral Methods Phase II
    Modeling Driver Behavior and Aggressiveness Using Biobehavioral Methods – Phase II
    Kondyli, Alexandra ;
    Chrysikou, Evangelia
    2020-01-01 | PDF
    Mathematical models of car-following, lane changing, and gap acceptance are mostly descriptive in nature and lack decision making or error tolerance. Including additional driver-related information with respect to behavior and cognitive characteristics would account for these lacking parameters and incorporate a human aspect to these models. Car-fo ...
  • Strengthening and Repair of Structural Concrete with a FabricReinforcedCementitiousMatrix FRCM Volume II Field Studies
    Strengthening and Repair of Structural Concrete with a Fabric-Reinforced-Cementitious-Matrix (FRCM) [Volume II]: Field Studies
    Myers, John J. ;
    Hernandez, Eli S.
    2020-01-01 | PDF
    With infrastructure continuing to age, technologies are being developed to strengthen structures as a more sustainable option than replacement. The use of fiber reinforced cementitious matrix (FRCM) strengthening systems is a promising new technology for adding flexural and shear capacity to existing reinforced concrete members. While cement based ...
  • Field Evaluation of V2I Connected Vehicle Deployment in Ada County Idaho Validating Communication Architecture and Control Technology Readiness
    Field Evaluation of V2I Connected Vehicle Deployment in Ada County, Idaho: Validating Communication Architecture and Control Technology Readiness
    Mohammad, Umair ;
    Madkour, Fatma Elzahraa
    2020-01-01 | PDF
    The primary objective of this project was to conduct a field evaluation of a vehicle-to-infrastructure (V2I) connected vehicle traffic signal system deployment in Ada County, Idaho, focusing on validating the communication architecture and control technology readiness for broad implementation. To that end, the reliability of line-of-sight packet ex ...
  • Structural Health Monitoring of Representative Cracks in the Manhattan Bridge
    Structural Health Monitoring of Representative Cracks in the Manhattan Bridge
    Babanajad, Saeed ;
    Moon, Franklin
    2020-01-01 | PDF
    The Manhattan Bridge in NYC is spanning the East River and connecting the island of Manhattan to Brooklyn. It is subjected to repeated dynamic loads, especially by the transit system trains with the average daily traffic of 1,000 trains/85,000 automobiles per day. As a result of repeated loads, multitudes of cracks have been developed in the floor ...
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