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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 1481 - 1500 of 36873 results
  • Electronic Water Level Sensors for Monitoring Scour Critical Structures
    Electronic Water Level Sensors for Monitoring Scour Critical Structures
    Kerkez, Branko ;
    Galvin, Kate Kusiak
    2024-06-28 | PDF
    This report details a research project aimed at developing and deploying a cost-effective water level sensor network for monitoring scour critical bridges in Michigan. The project involved a comprehensive review of existing water level monitoring technologies, followed by the selection and pilot deployment of Open-Storm sensors on over 30 bridges a ...
  • Development of Pavement Performance Models for MDOT A Neural Network Approach
    Development of Pavement Performance Models for MDOT: A Neural Network Approach
    Yasarer, Hakan ;
    Najjar, Yacoub M.
    2024-06-26 | PDF
    The continuous investigation into the mechanical properties and rehabilitation management of existing pavements is vital for the sustainability and efficiency of transportation systems. The Mississippi Department of Transportation (MDOT) database, containing over 40 million records, necessitates modernized decision-making models that align with cur ...
  • Highway Sign Support Systems Condition Assessment Deterioration Models and Asset Management
    Highway Sign Support Systems: Condition Assessment Deterioration Models and Asset Management
    Salama, Talat ;
    Chae, Andy M
    2024-06-20 | PDF
    Sign support systems are important structures in the Connecticut Department of Transportation (CTDOT) bridge management system. Periodic inspections and maintenance activities are needed as long-term cost-effective maintenance strategy. This research provided the deterioration model and asset management plan for sign support systems to be considere ...
  • Bridge Deck NonDestructive Evaluation Testing Advanced Technology for Bridge Asset Management
    Bridge Deck Non-Destructive Evaluation Testing - Advanced Technology for Bridge Asset Management
    Kooban, Farhad ;
    Radlińska, Aleksandra
    2024-06-11 | PDF
    This report presents the findings from the comprehensive study on Bridge Deck Non-Destructive Evaluation (NDE) Testing conducted by The Pennsylvania State University under the sponsorship of the Pennsylvania Department of Transportation (PennDOT). The study focuses on the application of advanced non-destructive technologies to assess the condition ...
  • Workflows Implementation Tools and Guidance for Efficient UAVenabled Bridge Inspection
    Workflows, Implementation Tools, and Guidance for Efficient UAV-enabled Bridge Inspection
    Karimoddini, Ali ;
    Cavalline, Tara L
    2024-06-05 | PDF
    This project developed workflows and tools to advance the implementation and adoption of UASs to support bridge inspection practices. A series of workflows was developed to guide inspection personnel when conducting UAS- enabled bridge inspections, and guidance was prepared to assist agencies in the identification of bridge and site characteristics ...
  • Research Solutions Reclaimed Asphalt May Offer Resource Savings and Improved Pavement Performance Brief
    Research Solutions — Reclaimed Asphalt May Offer Resource Savings and Improved Pavement Performance [Brief]
    Iowa State University. Institute for Transportation
    2024-06-01 | PDF
    The main purpose of the proposed research is to develop a mix design procedure for high RAM mixtures with both rejuvenators and fractionated RAM materials for Iowa DOT and local public agencies by thoroughly understanding complex interactions between fractionated RAM and rejuvenators. Main objectives of this research are to: 1) examine the effects ...
  • RealTime Traffic Signal System Performance Measurement Project No 201614 Phase III System Integration Intersection Deployment and Control Center Dashboard Development Brief
    Real-Time Traffic Signal System Performance Measurement (Project No. 2016–14) Phase III: System Integration, Intersection Deployment, and Control Center Dashboard Development [Brief]
    Jin, Peter J. ;
    Brennan, Jr. Thomas M.
    2024-06-01 | PDF
    Traffic signal performance measurement and visualization provide insights as operational tools to help traffic management centers get more benefits from infrastructure investment. ATSPM system uses high-resolution (0.1 sec) data to support the data-driven decision-making process and allows consistent and dynamic monitoring of signal-controlled inte ...
  • A Scoping Review of Artificial Intelligence Applications in Airports
    A Scoping Review of Artificial Intelligence Applications in Airports
    Amiri, Misagh Haji ;
    Kuşakcı, Ali Osman
    2024-06-01 | PDF
    This paper aims to synthesize the literature on the application of artificial intelligence (AI) for airports. The selected methodology was based on the PRISMA Extension for Scoping Reviews (PRISMA-ScR), a recognized framework for systematic reviews. Authors searched the Scopus and Web of Science databases for articles that met the following criteri ...
  • Struggling To Connect Housing and Transportation Challenges of LowIncome Suburban Residents in the San Francisco Bay Area
    Struggling To Connect: Housing and Transportation Challenges of Low-Income Suburban Residents in the San Francisco Bay Area
    Pan, Alexandra ;
    Deakin, Elizabeth
    2024-06-01 | PDF
    Suburban areas have lower density development than urban areas, which may make them less accessible for the growing population of low- and moderate-income suburban residents, particularly those without a personal vehicle. This research examines factors that lead these households to move to suburban areas and identifies accessibility barriers they f ...
  • Assessing the Functionality of Transit and Shared Mobility Systems After Earthquakes
    Assessing the Functionality of Transit and Shared Mobility Systems After Earthquakes
    Soga, Kenichi ;
    Comfort, Louise
    2024-06-01 | PDF
    Located within the seismically active Pacific Ring of Fire, California's transportation infrastructure, especially in the Bay Area, is susceptible to earthquakes. A review of current research and stakeholder interviews revealed a growing awareness of emergency preparedness among local jurisdictions and transit agencies in recent years. However, man ...
  • Evaluation of EnhancedFriction Asphalt Overlays and Surface Treatments
    Evaluation of Enhanced-Friction Asphalt Overlays and Surface Treatments
    Moore, Nathan ;
    Heitzman, Michael
    2024-06-01 | PDF
    Highway agencies are responsible for maintaining pavements with good surface friction performance. High crash locations are often treated with a high friction surface treatment that has very good friction performance but has a high cost. This study examined asphalt surface mixtures with alternative friction aggregates using accelerated laboratory T ...
  • UltraHigh Performance Concrete UHPC Application in Link Slabs for Crack Mitigation Research Project Capsule 241ST
    Ultra-High Performance Concrete (UHPC) Application in Link Slabs for Crack Mitigation: Research Project Capsule [24–1ST]
    Okeil, Ayman M. ;
    Rupnow, Tyson
    2024-06-01 | PDF
    The objective of this study is to explore the feasibility of using Ultra-High Performance Concrete (UHPC) in a bridge link slab for the purpose of producing crack-free continuity detail. This new link slab detail will employ a UHPC mix design that is suitable for Louisiana.
  • Reducing LowTemperature Cracking on Local Roads
    Reducing Low-Temperature Cracking on Local Roads
    Nazzal, Munir D ;
    Berner, William (Chris)
    2024-06-01 | PDF
    This report summarizes the research work that was completed to: 1) assess the effects of the properties of the aggregates, binders, RAP, and asphalt mixtures on low-temperature cracking resistance of mixes used on local roads, and 2) develop recommendations and specifications for designing low volume pavements that are more resistant to low-tempera ...
  • Traffic Safety Facts 2021 Data Race and Ethnicity
    Traffic Safety Facts 2021 Data: Race and Ethnicity
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-06-01 | PDF
    This fact sheet reports data on traffic fatalities by race and ethnicity, which might help develop countermeasures for those at risk. The term “race-ethnicity” is used to refer to the combined classification of race and ethnicity data. Of the 43,230 traffic fatalities in 2021, White people accounted for 50 percent while Black or African American pe ...
  • Methods for Maintaining Pavement Marking Retroreflectivity Video
    Methods for Maintaining Pavement Marking Retroreflectivity [Video]
    Peterson, Ethan ;
    Jackels, Jon
    2024-06-01 | MP4
    To reduce highway fatalities after dark, the U.S. Federal Highway Administration (FHWA) issued new requirements for pavement marking “retroreflectivity” (the measure to which pavement markings reflect headlamp light back to its source). This standard has been incorporated into the Minnesota Manual on Uniform Traffic Control Devices (MN MUTCD) and a ...
    Supporting Files
  • Optical Fiber SensorEmbedded Strands for LongTerm Monitoring of PostTensioned Tendons in Bridge Elements
    Optical Fiber Sensor-Embedded Strands for Long-Term Monitoring of Post-Tensioned Tendons in Bridge Elements
    Williams, Christopher S ;
    Okumus, Pinar
    2024-06-01 | PDF
    Tendon forces are fundamental to the performance of post-tensioned (PT) bridges. Therefore, monitoring tendon forces is important for understanding the health of PT bridge elements and evaluating the condition of prestressing strands. Implementing a reliable method to monitor PT tendons during the service life of the structure, however, is a challe ...
  • Evaluation of AASHTO T 397 Standard Method of Test for Uniaxial Tensile Response of UltraHigh Performance Concrete Tech Transfer Summary
    Evaluation of AASHTO T 397, Standard Method of Test for Uniaxial Tensile Response of Ultra-High Performance Concrete [Tech Transfer Summary]
    Sritharan, Sri ;
    Gali, Sahith
    2024-06-01 | PDF
    The main objective of this study was to independently evaluate the reliability and repeatability of a tension test method for ultra-high performance concrete (UHPC) developed by the Federal Highway Administration (FHWA) and adopted by the American Association of State Highway and Transportation Officials (AASHTO) as AASHTO T 397.
  • Reducing Crash Risk at Work Zones in South Carolina
    Reducing Crash Risk at Work Zones in South Carolina
    Huynh, Nathan ;
    Madarshahian, Mahyar
    2024-06-01 | PDF
    This project investigated several aspects related to work zone safety. First, it examined the accuracy of the information recorded in the South Carolina (SC) traffic collision report forms (TR-310). A total of 200 fatal crashes in work zones between 2014 and 2020 were examined to determine how many discrepancies exist between the written narrative ...
  • Enhancing Collaboration Through WebBased Visualization and Analysis of Traffic Crash Data
    Enhancing Collaboration Through Web-Based Visualization and Analysis of Traffic Crash Data
    Zhang, Su ;
    Eshelman, Tyler A.
    2024-06-01 | PDF
    It is widely accepted that road traffic safety is a significant public health issue. One of the effective ways to improve road traffic safety is analyzing crash data to understand where traffic accidents occur, identify associated spatial and temporal patterns, and determine causation. In the State of New Mexico, locations of traffic accidents are ...
  • New Mix Design Method for HotMix ColdLaid Mixtures
    New Mix Design Method for Hot-Mix Cold-Laid Mixtures
    Chan, Kin Ming ;
    Zhou, Fujie
    2024-06-01 | PDF
    Hot-mix cold-laid (HMCL) asphalt mixes are crucial for maintaining asphalt pavements via blade-on/level-up patching. While the Superpave Gyratory Compactor (SGC) is widely used for hot-mix asphalt mixes due to its adjustable parameters and manageable compaction densities, the HMCL mix design still follows the Hveem mix design method, as per the Tex ...
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