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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 841 - 860 of 36049 results
  • 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 ...
  • 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.
  • 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 ...
  • 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 ...
  • ReUse Of Minnesota Waste Material In Sustainably Design Soils Research Summary
    Re-Use Of Minnesota Waste Material In Sustainably Design Soils [Research Summary]
    Stenlund, Dwayne ;
    Saftner, David
    2024-10-01 | PDF
    Minerals, forestry, agriculture, and industrial activities in Minnesota generate substantial by-products and waste. Strategies to reuse or recycle these can reduce landfill waste, enhance public health, conserve resources, and cut costs and emissions. Building on the frameworks by Johnson et al. (2017), Saftner et al. (2019), and Saftner et al. (20 ...
  • Synthesis of Seal Coat Research in Minnesota
    Synthesis of Seal Coat Research in Minnesota
    Minnesota. Department of Transportation. Local Road Research Board
    2024-10-01 | PDF
    While seal coating has been widely used as a cost-effective strategy in asphalt pavement preservation by the Minnesota Department of Transportation (MnDOT) and local agencies to extend the life of pavements, some cities and counties in Minnesota have reported their concerns about the premature stripping of street pavements that have been seal coate ...
  • Toward Implementation of MaxPressure Control on Minnesota Roads Phase 2
    Toward Implementation of Max-Pressure Control on Minnesota Roads: Phase 2
    Stern, Raphael ;
    Levin, Michael W.
    2024-10-01 | PDF
    Max-pressure (MP) traffic signal control is a new and innovative control algorithm that uses upstream and downstream vehicle counts to determine signal timing that maximizes throughput. While this method has been extensively tested in simulation, it has not yet been tested on actual traffic signals in the US. To close this gap, this report presents ...
  • Development of Test Procedures to Evaluate Moisture Susceptibility of Asphalt Mixtures Used in the State of Kansas Phase I Surface Free Energy of Binders
    Development of Test Procedures to Evaluate Moisture Susceptibility of Asphalt Mixtures Used in the State of Kansas, Phase I: Surface Free Energy of Binders
    Verma, Payal ;
    Darabi, Masoud K
    2024-10-01 | PDF
    The surface free energy of asphalt binders and aggregates is a critical material property related to the moisture sensitivity of asphalt mixtures. Surface free energies of these materials can be used to quantitatively determine the interfacial adhesive bond strength between two materials and the tendency of water to displace this bond based on fund ...
  • Measuring Fare Payment Compliance on MBTA Buses
    Measuring Fare Payment Compliance on MBTA Buses
    Gonzales, Eric J. ;
    Gao, Song
    2024-10-01 | PDF
    This study presents a method to estimate fare payment compliance within the Massachusetts Bay Transportation Authority bus system using only automatically collected data from the Automated Fare Collection and Automated Passenger Counting systems. Data from over 787,000 passenger boardings were used to identify patterns of fare system on-interaction ...
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