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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 4101 - 4120 of 36908 results
  • Unmanned Aerial Systems UAS for Transportation Incident Management and Infrastructure Assessment
    Unmanned Aerial Systems (UAS) for Transportation, Incident Management, and Infrastructure Assessment
    Helmicki, Arthur ;
    Hunt, Victor
    2021-05-01 | PDF
    Unmanned aerial systems (UAS) have received significant attention in recent years due to substantial advances in capabilities. The goal for this project has been to work with Drive Ohio and the Ohio UAS Center: (1) to identify those Ohio Department of Transportation (ODOT) core business functions which can be improved/enhanced by application of UAS ...
  • Understanding the Transportation Mobility Needs for an Aging New Jersey Population
    Understanding the Transportation Mobility Needs for an Aging New Jersey Population
    Deka, Devajyoti ;
    Alexander, Karen
    2021-05-01 | PDF
    This research was conducted with two broad objectives: (a) to identify the transportation mobility needs and barriers of older adults in New Jersey, and (b) to recommend innovative strategies to meet their transportation needs. To fulfill its objectives the research took resource to (a) literature review; (b) online research to review innovative mo ...
  • Summary Findings of ReEngineered Continuously Reinforced Concrete Pavement Volume 1
    Summary Findings of Re-Engineered Continuously Reinforced Concrete Pavement: Volume 1
    Roesler, Jeffery ;
    Dahal, Sachindra
    2021-05-01 | PDF
    This research project conducted laboratory testing on the design and impact of internal curing on concrete paving mixtures with supplementary cementitious materials and evaluated field test sections for the performance of crack properties and CRCP structure under environmental and FWD loading. Three experimental CRCP sections on Illinois Route 390 ...
  • Investigation on Wrong Way Driving Prevention Systems
    Investigation on Wrong Way Driving Prevention Systems
    Golias, Mihalis ;
    Mishra, Sabyasachee
    2021-05-01 | PDF
    Wrong-way driving (WWD) is an event where a vehicle enters a high-speed divided highway from an off-ramp in the direction opposing to the legal traffic flow. Although being less frequent than other crash type, WWD is significantly more fatal and in Tennessee, there are on average 20 WWD annually. Therefore, this report aims to first understand WWD ...
  • Strategies to Identify and Mitigate Secondary Crashes Using RealTime Traffic Data on Floridas Turnpike
    Strategies to Identify and Mitigate Secondary Crashes Using Real-Time Traffic Data on Florida's Turnpike
    Alluri, Priyanka ;
    Sando, Thobias
    2021-05-01 | PDF
    The primary goal of this research was to develop a comprehensive approach to identify and mitigate secondary crashes on the Florida Turnpike System in real time. The specific research objectives were to: (1) identify secondary crashes; (2) identify significant factors contributing to the occurrence of secondary crashes; (3) develop an algorithm tha ...
  • Community Engagement in Rural Communities
    Community Engagement in Rural Communities
    Uddin, Mohammad Moin ;
    Foster, Kelly
    2021-05-01 | PDF
    Public involvement is defined as a two-way communication aimed at providing information to the public and incorporating the views, concerns, and issues of the public in the transportation decision-making process. By involving the public early in planning transportation projects and throughout the development and implementation of projects, a transp ...
  • Smart Interaction Pedestrians and Vehicles in a CAV Environment
    Smart Interaction Pedestrians and Vehicles in a CAV Environment
    Zhang, Yunchang ;
    Fricker, Jon D.
    2021-05-01 | PDF
    “Semi-controlled” crosswalks exist because of the desire for pedestrians to cross there and the use of stop signs or signals is not warranted. However, there is a sufficient amount of interaction between pedestrians and vehicles at “semi-controlled” crosswalks to be concerned about the time at which “negotiations” between pedestrians and human driv ...
  • Implementing Machine Learning With Highway Datasets
    Implementing Machine Learning With Highway Datasets
    Zhang, Yunfeng ;
    Cutts, Ross
    2021-05-01 | PDF
    Every year MDOT invests millions of dollars into testing geomaterials, digitizing historic records and capturing inventory and condition data. Massive amounts of tabular data, documentation and imagery, which are relevant for planning and engineering purposes, continue to be accumulated. The engineering characteristics of pavement or other material ...
  • Predicting Vehicle Trajectories at Intersections Using Advanced Machine Learning Techniques
    Predicting Vehicle Trajectories at Intersections Using Advanced Machine Learning Techniques
    Jazayeri, Mohammad Sadegh ;
    Jahangiri, Arash
    2021-05-01 | PDF
    The ability to accurately predict vehicle trajectories is essential in infrastructure-based safety systems that aim to identify critical events such as near-crash situations and traffic violations. In a connected environment, important information about these critical events can be communicated to road users or the infrastructure to avoid or mitiga ...
  • Wireless Crack Sensing Systems for Bridges
    Wireless Crack Sensing Systems for Bridges
    Wu, Chenglin
    ORCID ICON IMG
    2021-05-01 | PDF
    The main objective of this research was to develop and deploy a wireless crack sensing system that can measure and monitor cracks for both concrete and steel bridge structures. This system contained the sensing unit, wireless data transmitting system, as well as a data processing unit. The sensing unit consisted of single or arrays of advanced thin ...
  • Unmanned Aircraft Systems UAS Metro District Bridge Inspection Implementation
    Unmanned Aircraft Systems (UAS) - Metro District Bridge Inspection Implementation
    Wells, Jennifer ;
    Lovelace, Barritt
    2021-05-01 | PDF
    Drones for bridge inspection research has been completed by MnDOT in multiple phases since 2015. As of summer, 2017, Phase III of this research began using the SenseFly Albris and the Flyability Elios, a collision-tolerant drone more suited to confined spaces such as box girders, culverts, or areas that are difficult to access. Due to the success o ...
  • Field Demonstration of GPR and UAV Technologies for Evaluation of Two US 7577 Bridges
    Field Demonstration of GPR and UAV Technologies for Evaluation of Two US 75/77 Bridges
    Pashoutani, Sepehr ;
    Zhu, Jinying
    2021-05-01 | PDF
    Two Nebraska bridges with asphalt overlay were selected for nondestructive testing and evaluation (NDT/NDE). Three NDT techniques were conducted on these two bridges, including Ground Penetrating Radar (GPR), Half-Cell Potential (HCP) and Unmanned Aerial Vehicle (UAV) imaging. NDT data were collected during three construction stages of the bridges: ...
  • Detecting Pavement Distresses Using Crowdsourced Dashcam Camera Images
    Detecting Pavement Distresses Using Crowdsourced Dashcam Camera Images
    Dadashova, Bahar ;
    Dobrovolny, Chiara Silvestri
    2021-05-01 | PDF
    Pavements play a vital role in the transportation infrastructure in the United States. Damage to public road transportation infrastructure causes roadways to fail to perform as intended and increases crash risks. Road damage must be detected quickly and accurately in order to maintain roads and effectively allocate repair money. In this study, four ...
  • Concrete Bridge Deck Deterioration Assessment Using Ground Penetrating Radar
    Concrete Bridge Deck Deterioration Assessment Using Ground Penetrating Radar
    Hu, Da ;
    Li, Shuai
    2021-05-01 | PDF
    Ground penetrating radar (GPR) is a non-destructive technique that has been used to inspect and assess concrete bridge deck deterioration. The objective of this project is to investigate the use of GPR in concrete bridge deck inspection and develop semi-automated tools to process GPR data for detecting, mapping, and visualizing potential deteriorat ...
  • Reference Machine Vision for ADAS Functions
    Reference Machine Vision for ADAS Functions
    Nayak, Abhishek ;
    Rathinam, Sivakumar
    2021-05-01 | PDF
    Studies have shown that fatalities due to unintentional roadway departures can be significantly reduced if Lane Departure Warning and Lane Keep Assist systems are used effectively. However, these systems have not been widely adopted due, in part, to the lack of suitable standards for pavement markings that enable reliable functionality of sensor sy ...
  • Analysis of ActivityTravel Patterns and Tour Formation of Transit Users
    Analysis of Activity-Travel Patterns and Tour Formation of Transit Users
    McNally, Michael G ;
    Rafiq, Rezwana
    2021-04-30 | PDF
    This study analyzed the complex travel behavior of transit users by expanding conventional trip-based approaches by considering full activity-travel tours and patterns as basic units of analysis. A tour was defined as a sequence of trips that begins and ends at home and a pattern was defined as an entire day’s sequence of activities and associated ...
  • Construction and Materials Best Practices for Concrete Sidewalks
    Construction and Materials Best Practices for Concrete Sidewalks
    Brena, Sergio ;
    Peterman, Kara
    2021-04-30 | PDF
    This report summarizes an 18-month effort to investigate best practices to incorporate into the materials and construction of concrete sidewalks to mitigate surface scaling damage induced by freeze-thaw cycles in the presence of deicing chemicals. The study involved an in-situ experimental study accompanied by laboratory testing and quantitative an ...
  • Evaluating the Connection Between Transit and TNCs Transportation Network Companies in Pinellas County for Statewide Application
    Evaluating the Connection Between Transit and TNCs (Transportation Network Companies) in Pinellas County for Statewide Application
    Peng, Zhong-Ren ;
    Qin, Haoming
    2021-04-30 | PDF
    This report proposes to conduct a comprehensive investigation of active and inactive partnerships between transit agencies and TNCs in Pinellas County to enhance understanding of project development and how the partnership can be cost-effectively achieved. This report used a spatiotemporal analysis and on the Direct Connect rides over the past thre ...
  • FDOT Procedures for Welding Testing and Fabricating Weathering Stainless Steel for Bridge Applications
    FDOT Procedures for Welding, Testing, and Fabricating Weathering Stainless Steel for Bridge Applications
    Khan, Adil ;
    Dzikowski, Phil
    2021-04-30 | PDF
    Weathering steels have been gaining acceptance in the fabrication of highway structures and bridges across the US. Over the last decade, several transportation agencies have made concerted efforts to utilize weathering steels for structures in areas where they can be used safely and effectively. The primary factor for this change is the potential c ...
  • Innovative Foundation Alternative for HighSpeed Rail Application
    Innovative Foundation Alternative for High-Speed Rail Application
    Stephenson, Andrew ;
    Chang, Michelle
    2021-04-22 | PDF
    High-speed railway provides a fast and robust travel choice that enhances transport of people and goods, which may act as the national economy's main artery. Compared to conventional railways, HSR has more stringent structural and geotechnical requirements to minimize deformations and avoid excessive vibrations. Bridges are a key component of the H ...
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