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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 861 - 880 of 36104 results
  • Usefulness and Reliability of Probe Data When Alerting Work Zone Message Signs Summary
    Usefulness and Reliability of Probe Data When Alerting Work Zone Message Signs [Summary]
    Day, Christopher M. ;
    Knickerbocker, Skylar
    2024-10-01 | PDF
    This study investigated the viability of using crowdsourced data sets, specifically segment speed data (SSD) and connected vehicle data (CVD), for providing real-time traffic information to the public. After a literature review and interviews with state department of transportation personnel were conducted, the study focused on work zone queue warn ...
  • Usefulness and Reliability of Probe Data When Alerting Work Zone Message Signs
    Usefulness and Reliability of Probe Data When Alerting Work Zone Message Signs
    Day, Christopher M. ;
    Okaidjah, Dorcas
    2024-10-01 | PDF
    This study investigated the viability of using crowdsourced data sets, specifically segment speed data (SSD) and connected vehicle data (CVD), for providing real-time traffic information to the public. After a literature review and interviews with state department of transportation personnel were conducted, the study focused on work zone queue warn ...
  • Micromobility Analytics in Florida Usage Patterns Public Transit Synergies and Crash Insights
    Micromobility Analytics in Florida: Usage Patterns, Public Transit Synergies, and Crash Insights
    Peng, Zhong-Ren ;
    Lu, Kaifa
    2024-10-01 | PDF
    Micromobility has become increasingly popular in cities across Florida and the nation, offering a convenient, flexible, and accessible alternative for short-distance travel, particularly for first- and last-mile transportation. However, most areas of Florida and even the nation currently lack a framework and established practices for micromobility ...
  • Evaluation of Kentuckys Driver Focus Camera System
    Evaluation of Kentucky’s Driver Focus Camera System
    Leddy, David ;
    Beaven, Brian
    2024-10-01 | PDF
    Commercial motor vehicle (CMV) drivers who engage in federally prohibited activities such as not wearing safety belts, using hand-held mobile phones, or texting while driving endanger themselves and imperil the well-being of everyone who occupies the surrounding roadway environment. Unfortunately, conventional CMV inspection routines fail to detect ...
  • PostFire Damage Inspection of Concrete Structures Phase III InSitu Experimental Phase
    Post-Fire Damage Inspection of Concrete Structures Phase III – In-Situ Experimental Phase
    Toscano, Tom ;
    Gerasimidis, Simos
    2024-10-01 | PDF
    Cementitious fireproofing has become an essential technique for safeguarding tunnel infrastructure against fire-induced damage, principally by providing a thermal barrier between flexural members and a fire event. Although fireproofing is extensively employed across different sectors, its specific utilization and efficacy in tunnel scenarios is ina ...
  • Second Order Effects on the Design of Slender Reinforced Concrete Bridge Columns
    Second Order Effects on the Design of Slender Reinforced Concrete Bridge Columns
    Denavit, Mark D ;
    Esmaeelpour, Javad
    2024-10-01 | PDF
    The AASHTO LRFD Bridge Design Specifications (AASHTO, 2017), hereafter referred to as AASHTO LRFD, includes an approximate method for the design of slender RC bridge columns. This approximate method, the method most commonly used by bridge engineers, was adapted from building design codes such as the ACI Building Code Requirements for Structural Co ...
  • Development of an UltraHighPerformance Concrete HPile and Its Connections for Alabama Bridge Foundations
    Development of an Ultra-High-Performance Concrete H-Pile and It’s Connections for Alabama Bridge Foundations
    Aaleti, Sriram ;
    Willis, Gabrielle
    2024-10-01 | PDF
    The research scope of this proposal focuses on the development and testing of an innovative Ultra-High Performance Concrete (UHPC) H-pile system for use in bridge foundations in Alabama. The main goal is to design a cost-effective, durable H-shaped prestressed pile that matches the physical dimensions and weight characteristics of traditional steel ...
  • 07167 Evaluate Performance of Sealers and Coatings Applied to TxDOT Bridge Substructures
    0-7167: Evaluate Performance of Sealers and Coatings Applied to TxDOT Bridge Substructures
    Mukhopadhyay, Anol ;
    Mistri, Abhijit
    2024-10-01 | PDF
    Sealers and coatings protect concrete bridge substructure elements from chloride-induced corrosion and extend the useful life of existing bridges. Their application is a common practice by the Texas Department of Transportation (TxDOT). Although concrete-penetrating surface treatments, Type X waterproofing, silicone resin paint, or opaque sealers a ...
  • MobilePhoneBased Artificial Intelligence Package Development and Validation in Large Scale for Maintenance Asset Management
    Mobile-Phone-Based Artificial Intelligence Package Development and Validation in Large Scale for Maintenance Asset Management
    Kuang, Biao ;
    Chen, Jianli
    2024-10-01 | PDF
    Regular inspection of transportation assets is essential to maintain their optimal condition and functionality. Our previous UDOT-funded project (Contract No. 22-8099, Report No. UT-22.24) demonstrated significant promise of artificial intelligence in identifying various transportation assets through a mobile phone. However, the initial project was ...
  • The Effect of Rubber Fills on the Performance of Infrastructure
    The Effect of Rubber Fills on the Performance of Infrastructure
    Elashram, Mohamed ;
    Gheni, Ahmed
    2024-10-01 | PDF
    One of the most environmentally friendly methods to recycle scrap tires is by shredding them into tire derived aggregate (TDA). TDA possesses desirable properties for various civil engineering applications and has been successfully used as fill material in numerous projects. To address the limitations of previous studies, 27 direct shear tests were ...
  • Impact of Legalized 25Kip Axle Loads for SelfPropelled Implements of Husbandry on Iowa Bridges Tech Transfer Summary
    Impact of Legalized 25-Kip Axle Loads for Self-Propelled Implements of Husbandry on Iowa Bridges [Tech Transfer Summary]
    Dahlberg, Justin ;
    Phares, Brent M.
    2024-10-01 | PDF
    This research aimed to assess bridge behavior under terragator-type implements of husbandry (IoH) with 25 kip axle loads. The key objectives were as follows: 1. Identify current in-service terragator-type legal vehicles per Iowa Code 321.463.a(1)(2). 2. Perform live load tests of bridges using terragator vehicles to determine actual live load distr ...
  • Anomaly Detection in Traffic Patterns Using the INDOT Camera System
    Anomaly Detection in Traffic Patterns Using the INDOT Camera System
    Christopher, Lauren ;
    Chien, Stanley
    2024-10-01 | PDF
    The Transportation and Autonomous Systems Institute (TASI) of Purdue University Indianapolis (PUI) and the INDOT Traffic Management Center worked together to develop a system that monitors traffic conditions using INDOT CCTV video feeds. Computer vision-based traffic anomaly detection has been studied for the past 20 years, and a thorough state-of- ...
  • Development of a Smart Phone App to Warn the Driver of Unintentional Lane Departure Using GPS Technology
    Development of a Smart Phone App to Warn the Driver of Unintentional Lane Departure Using GPS Technology
    Tasnim, N Z ;
    Hayee, M. Imran
    2024-10-01 | PDF
    Unintentional lane departure is a significant safety risk. Currently, available commercial lane departure warning systems use vision-based or GPS technology with lane-level resolution. These techniques have their own performance limitations in poor weather conditions. We have previously developed a lane departure detection (LDD) algorithm using sta ...
  • New Smartphone App Uses GPS Technology to Warn Drivers of Lane Departures Research Summary
    New Smartphone App Uses GPS Technology to Warn Drivers of Lane Departures [Research Summary]
    Lund, Victor ;
    Hayee, M. Imran
    2024-10-01 | PDF
    Unintentional lane departure is a significant safety risk. Currently, available commercial lane departure warning systems use vision- based or GPS technology with lane-level resolution. These techniques have their own performance limitations in poor weather conditions. The authors have previously developed a lane departure detection (LDD) algorithm ...
  • Development of a Resilience Index for the Florida Surface Transportation System Summary
    Development of a Resilience Index for the Florida Surface Transportation System [Summary]
    Carver, Jennifer Z ;
    Choi, Juyeonge
    2024-10-01 | PDF
    This research proposed a composite index framework using technical, socioeconomic, and environmental aspects to measure and monitor the robustness and rapidity of various aspects of a regional transportation infrastructure’s resilience to wind and water-related hazards.
  • Identifying Critical Knowledge Gaps and Assessing Organizational Readiness for Improved Knowledge Management
    Identifying Critical Knowledge Gaps and Assessing Organizational Readiness for Improved Knowledge Management
    Ivey, Stephanie ;
    Janz, Brian
    2024-10-01 | PDF
    For an organization to develop a sustainable strategy that supports technical capacity, workforce retention, and innovation, it is essential to develop a strong framework for knowledge management (KM) both within individual divisions as well as organization wide. For state departments of transportation (DOTs), KM has become a topic of increasing ur ...
  • A Field Evaluation of the Perpetual Pavement Concept Fact Sheet
    A Field Evaluation of the Perpetual Pavement Concept [Fact Sheet]
    Khoury, Issam ;
    Chou, Eddie
    2024-10-01 | PDF
    The primary goal of this research was to design, construct and instrument the first in-service perpetual pavement constructed with HPM. This research is expected to provide ODOT’s Office of Pavement Engineering with a method for future perpetual pavement design. Specific objectives of this research were as follows: • Conduct a literature review of ...
  • Impact of Legalized 25Kip Axle Loads for SelfPropelled Implements of Husbandry on Iowa Bridges
    Impact of Legalized 25-Kip Axle Loads for Self-Propelled Implements of Husbandry on Iowa Bridges
    Dahlberg, Justin ;
    Liu, Zhengyu
    2024-10-01 | PDF
    Live load field tests of bridges were carried out using certain implements of husbandry (IoH) to observe the transverse load distribution and the dynamic impacts. A finite element (FE) analysis of the field-tested bridges was performed. The strain data from the FE analysis were validated with the field test data to establish an FE analysis method f ...
  • Safety Impacts of Fluorescent YellowGreen Signs on Pedestrians
    Safety Impacts of Fluorescent Yellow-Green Signs on Pedestrians
    Brown, Henry ;
    Edara, Praveen
    2024-10-01 | PDF
    The Manual on Uniform Traffic Control Devices (MUTCD) specifies the use of yellow sheeting for pedestrian or bicycle signs and fluorescent yellow-green (FYG) for school signs, with an option for the use of FYG sheeting for pedestrian or bicycle warning signs. However, switching from yellow or fluorescent yellow (FY) to FYG for pedestrian and bicycl ...
  • Developing Implementation Strategies for Risk Based Inspection RBI BackCasting Report
    Developing Implementation Strategies for Risk Based Inspection (RBI): Back-Casting Report
    Washer, Glenn ;
    Brown, Henry
    2024-10-01 | PDF
    The goal of this project was to improve asset management through the implementation of Risk-Based Inspection (RBI) practices. This project studied risk-based processes for developing extended inspection interval policies for bridges. Prior tasks in the research included Reliability Assessment Panels from six states developing risk models for bridge ...
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