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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 881 - 900 of 36049 results
  • Convex Reformulation of Information Constrained Linear State Estimation with MixedBinary Variables for Outlier Accommodation
    Convex Reformulation of Information Constrained Linear State Estimation with Mixed-Binary Variables for Outlier Accommodation
    Hu, Wang ;
    Jiang, Zeyi
    2024-09-13 | PDF
    This article considers the challenge of accommodating outlier measurements in state estimation. The Risk-Averse Performance-Specified (RAPS) state estimation approach addresses outliers as a measurement selection Bayesian risk minimization problem subject to an information accuracy constraint, which is a non-convex optimization problem. Prior explo ...
  • Internal Curing with Fine Light Weight Aggregates FLWA Created from Unsuitable Coal Combustion Ash CCA
    Internal Curing with Fine Light Weight Aggregates (FLWA) Created from Unsuitable Coal Combustion Ash (CCA)
    Alqenai, Yousif M. ;
    Tejuoso, Bankole
    2024-09-12 | PDF
    This work studies the potential use of fine lightweight aggregates (FLWA) created from ‘as received’ landfill condition coal combustion ash (CCA), referred to as CCA-FLWA, for concrete internal curing applications. The innovative CCA-FLWA is manufactured using high-temperature sintering like available industrial kilns. To manufacture CCA-FLWA with ...
  • Reduce Fatal Serious Injury Crashes
    Reduce Fatal & Serious Injury Crashes
    Kurkcu, Abdullah ;
    Deutsch, Paul
    2024-09-04 | PDF
    There is an urgency to initiate innovative approaches to transportation safety to reduce traffic fatalities and serious injuries in South Dakota. Therefore, the South Dakota Department of Transportation is exploring the implementation of a zero-fatality transportation safety initiative. A literature review of national strategies and relevant polici ...
    Supporting Files
  • Utilizing a ParticlePacking Approach for an IllinoisSpecific Nonproprietary LowShrinkage UHPC
    Utilizing a Particle-Packing Approach for an Illinois-Specific, Nonproprietary, Low-Shrinkage UHPC
    Baten, Bayezid ;
    Gombeda, Matthew J
    2024-09-01 | PDF
    Ultra-high-performance concrete (UHPC) represents the next generation of concrete, with a strength 3-4 times greater than traditional concrete (100-120 MPa as opposed to 30-40 MPa). However, most of the commercial UHPC mixes are proprietary and expensive. In this project, we document the development of nonproprietary, cost-effective UHPC mixes prim ...
  • Evaluating the Robustness of MDSS Forecast and Compliance with Recommendations
    Evaluating the Robustness of MDSS Forecast and Compliance with Recommendations
    Brinster, Gregory L ;
    Desai, Jairaj
    2024-09-01 | PDF
    The Indiana Department of Transportation (INDOT) adopted the Maintenance Decision Support System (MDSS) for user-defined plowing segments in the winter of 2008–2009. Since then, many new data sources, including connected vehicle data, enhanced weather data, and fleet telematics have been integrated into INDOT winter operations activities. The objec ...
  • Verification of ODOT Rock Channel Design Procedures Fact Sheet
    Verification of ODOT Rock Channel Design Procedures [Fact Sheet]
    Che, Daniel ;
    Bricker, Jeremy
    2024-09-01 | PDF
    The Ohio Department of Transportation (ODOT) employs rock channel protection (RCP), also known as riprap, to manage energy dissipation and prevent scouring at culvert and storm drain outlets. The design for RCP at outlets follows guidelines outlined in Figure 1002-4 of ODOT's Location and Design Manual Volume 2, incorporating specifications from OD ...
  • Robust DecisionMaking Framework for Sustainable Operations and Planning of MBTA Rapid Transit Vehicles
    Robust Decision-Making Framework for Sustainable Operations and Planning of MBTA Rapid Transit Vehicles
    Han, Zhuo ;
    Christofa, Eleni
    2024-09-01 | PDF
    Urban Rail Transit (URT) systems play a critical role in modern cities but consume significant amounts of energy. Understanding and predicting energy consumption patterns in these systems is vital for sustainable urban planning, especially during disruptive events. This study presents a Long Short-Term Memory (LSTM) recurrent neural network, the mo ...
  • Road Weather Management Using Connected Vehicle Technology
    Road Weather Management Using Connected Vehicle Technology
    Perry, Frank ;
    Toth, Chris
    2024-09-01 | PDF
    Road weather systems collect, analyze, and share weather information to help mitigate the disruptive impact of weather events on the nation’s surface transportation system. Much research and development has been undertaken to advance road weather management practice. Meanwhile, many state and local efforts have aimed to deploy connected vehicle (CV ...
  • Comprehensive Pavement Patching Tools and WebBased Software for Pavement Condition Assessment and Visualization
    Comprehensive Pavement Patching Tools and Web-Based Software for Pavement Condition Assessment and Visualization
    Jha, Sneha ;
    Zhang, Yaguang
    2024-09-01 | PDF
    It is a common practice among state agencies to manually inspect road segments and decide maintenance requirements based on the pavement condition index (PCI). However, standalone PCI only evaluates the pavement surface condition. When coupled with the variability in human perception of pavement distress, this limits the accuracy of current pavemen ...
  • Exploring Apex Predator Effects on WildlifeVehicle Collisions A Case Study on Wolf Reintroductions in Yellowstone
    Exploring Apex Predator Effects on Wildlife-Vehicle Collisions: A Case Study on Wolf Reintroductions in Yellowstone
    Bell, Matthew ;
    Huijser, Marcel P.
    2024-09-01 | PDF
    This study investigates the impact of wolf reintroduction on wildlife-vehicle collisions (WVCs) along a segment of US-191 bordering Yellowstone National Park. Wolves were reintroduced in 1995–1996, and subsequent wolf pack establishment may have influenced the behavior and population dynamics of prey species, potentially altering WVC patterns. Usin ...
  • Spot Zone and Overcoat Painting of Steel Bridges
    Spot, Zone and Overcoat Painting of Steel Bridges
    Wells, Danny ;
    Palle, Sudir
    2024-09-01 | PDF
    Over the past 25–30 years, the Kentucky Transportation Cabinet (KYTC) has replaced lead-based coatings on many bridges, often with zinc-based systems. But many of these coating systems are now degrading and reaching the ends of their service lives. Historically, KYTC has relied entirely on remove-and-replace painting, however, given the programmati ...
  • Dowel Concrete Interface Performance Validation in Concrete Rehabilitations
    Dowel – Concrete Interface Performance Validation in Concrete Rehabilitations
    Izevbekhai, Bernard Igbafen ;
    Aydin, Ceren
    2024-09-01 | PDF
    The Minnesota Department of Transportation (MnDOT) investigated the use of dowels with various anchoring methods and their effects on pavement performance. In a previous study, the characteristics of various epoxy and grout anchorage systems at the interface between new construction and existing concrete were studied using cut-out slabs brought int ...
  • Impacts of Cooperative Automated Transportation on Wyoming Highway Infrastructure
    Impacts of Cooperative Automated Transportation on Wyoming Highway Infrastructure
    Ahmed, Mohamed ;
    Ahmed, Irfan
    2024-09-01 | PDF
    The primary objectives of this research are to synthesize the state-of-the-practice of existing national, state, and local agencies regulations and legislations related to AVs/CAVs, to identify infrastructure, traffic management policy, roadway design and standardization needs in order to facilitate deployment of autonomous driving, to investigate ...
  • Design and Operational Assessment of a Mobile Robot for Undercarriage Inspection of Railcars
    Design and Operational Assessment of a Mobile Robot for Undercarriage Inspection of Railcars
    Ahmadian, Mehdi ;
    Kasch, James M
    2024-09-01 | PDF
    This research assesses the design and track operation of a track crawler robot (TCR) for practical and easy inspection of stationary railcars’ undercarriages in an effort to detect any pending failures or assess any security risk of out-of-sight objects. The TCR includes a drive system consisting of two AC motors that operate a track (like tank tra ...
  • First and Last Mile Connectivity for Missourians
    First and Last Mile Connectivity for Missourians
    Villagran, Alvaro ;
    Lauer, Peter
    2024-09-01 | PDF
    By closing gaps in transit systems or by complementing transportation services, first-last mile transportation services are integral in enabling access to employment opportunities as well as other key destinations. This research study examined first-last mile service programs across the United States and assessed existing conditions in Missouri to ...
  • Verification of ODOT Rock Channel Design Procedures Fact Sheets
    Verification of ODOT Rock Channel Design Procedures [Fact Sheets]
    Che, Daniel ;
    Bricker, Jeremy
    2024-09-01 | PDF
    The Ohio Department of Transportation (ODOT) employs rock channel protection (RCP), also known as riprap, to manage energy dissipation and prevent scouring at culvert and storm drain outlets. The design for RCP at outlets follows guidelines outlined in Figure 1002-4 of ODOT's Location and Design Manual Volume 2, incorporating specifications from OD ...
  • Use of Iowa Eggshell Waste as BioCement Materials in Pavement and Gravel Road GeoMaterial Stabilization
    Use of Iowa Eggshell Waste as Bio-Cement Materials in Pavement and Gravel Road Geo-Material Stabilization
    Yang, Bo ;
    Yin, Zexi
    2024-09-01 | PDF
    This study investigated the utilization of eggshell powder (ESP) as a bio-based cementitious material for soil stabilization in Iowa, a state recognized as the leading egg producer in the United States. The prominence of egg production in Iowa results in substantial eggshell waste, a byproduct that, despite its high calcium carbonate content, remai ...
  • Speed Management and Emergency Response a Synthesis Study
    Speed Management and Emergency Response – a Synthesis Study
    Tainter, Francis ;
    Fitzpatrick, Cole
    2024-09-01 | PDF
    The impact of speed on roadways throughout the Commonwealth of Massachusetts continues to be a critical concern in the effort of achieving zero fatalities and reducing serious injuries. Speed management solutions are plentiful, and their impact is known; what is missing is the lack of use—municipal officials may be apprehensive in implementation. T ...
  • Evaluation of Intersection Safety and Capacity Relevant to Signal Timing on Arizonas State Highway System
    Evaluation of Intersection Safety and Capacity Relevant to Signal Timing on Arizona’s State Highway System
    De Guevara, Felipe ;
    Dean, Morgan
    2024-09-01 | PDF
    Traffic signal phase-change intervals are intended to provide a safe transition between two conflicting signal phases or a right-of-way transition between conflicting road-user movements. As a result, signal phase change (includes yellow change interval, red-clearance interval, and pedestrian intervals) has significant safety and operations implica ...
  • Measuring the Impact of Roadside Features on RoadDeparture Crashes and Prioritizing Safety Improvement Projects
    Measuring the Impact of Roadside Features on Road-Departure Crashes and Prioritizing Safety Improvement Projects
    Subedi, Abhishek Kumar ;
    Markovic, Nikola
    2024-09-01 | PDF
    This study investigated the impact of roadside features on road departure (RD) crashes and provided recommendations for safety improvements on Utah’s highways. The research utilized a computer vision model originally developed in the UDOT project, Automated Safety Assessment of Rural Roadways Using Computer Vision (Mashhadi et al., 2023), which was ...
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