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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 761 - 780 of 35815 results
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Evaluate Logistics Sprawls Impacts on Ecommerce Travel Patterns
    Evaluate Logistics Sprawl's Impacts on E-commerce Travel Patterns
    Asmussen, Katherine ;
    Anderson, Samantha M
    2024-10-01 | PDF
    E-commerce services and facilities have the benefits of bringing new employment opportunities to communities and meeting consumer needs, but they also attract heavy traffic, which results in congestion and negative environmental and economic repercussions. This project offers a new lens for studying future e-commerce facility siting, considering cu ...
  • Performance Evaluation of Very Early Strength LatexModified Concrete LMCVE Overlay
    Performance Evaluation of Very Early Strength Latex-Modified Concrete (LMC-VE) Overlay
    Wang, Kejin ;
    Shankaramurthy, Bharath Melugiri
    2024-10-01 | PDF
    Conventional bridge deck overlays made with high-performance concrete (HPC) and low-slump dense portland cement concrete (PCC) generally require a 72-hour wet curing time before they can be opened to traffic. Shorter opening times are desired to reduce the high cost of traffic control for heavily traveled urban highways. To meet this need, high ear ...
  • 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 ...
  • 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 ...
  • 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 ...
  • The Effect of Rubber Fills on the Performance of Infrastructure Research Summary
    The Effect of Rubber Fills on the Performance of Infrastructure [Research Summary]
    ElGawady, Mohamed
    ORCID ICON IMG
    2024-10-01 | PDF
    This report addresses a gap in the literature by presenting the results of large-scale shear and compressibility testing of soil classified as clayey gravel and sand soil mixed with different percentages and types of TDA.
  • 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 ...
  • 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 ...
  • Report from the 2024 UCLA Lake Arrowhead Symposium Mega Events Major Opportunities
    Report from the 2024 UCLA Lake Arrowhead Symposium: Mega Events, Major Opportunities
    Matute, Juan
    ORCID ICON IMG
    2024-10-01 | PDF
    On October 13–15, 2024, nearly 170 representatives of government, private sector consulting firms and companies, non-profit and advocacy groups, and universities joined the 2024 UCLA Lake Arrowhead Symposium on Mega Events, Major Opportunities. This report summarizes the discussions, lessons learned, and action items from the convening. Attendees h ...
  • 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 ...
  • A Field Evaluation of the Perpetual Pavement Concept
    A Field Evaluation of the Perpetual Pavement Concept
    Khoury, Issam ;
    Chou, Eddie
    2024-10-01 | PDF
    This report details the evaluation of a field study of the perpetual pavement concept. Seven test sections were instrumented on WAY 83 each with a specific build up to allow for a comprehensive examination of the effect of adding High Polymer to an asphalt mix. Sensors were installed in the test sections, including strain gages, temperature sensors ...
  • 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 ...
  • 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 ...
  • Development of Colorado Specific Safety Performance Functions SPFs and Diagnostic Norms for Roundabouts
    Development of Colorado Specific Safety Performance Functions (SPF’s) and Diagnostic Norms for Roundabouts
    McCarthy, Gillian ;
    Williams, Jim
    2024-10-01 | PDF
    Roundabouts commonly replace intersections to reduce the number of conflict points, with the objective of crash reduction and better operations. They are becoming ever more popular in the United States. Many U.S. based research studies on the topic of roundabouts have focused on evaluating the effectiveness of converting existing intersections to r ...
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