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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 2101 - 2120 of 36873 results
  • Connected Vehicle Application Development
    Connected Vehicle Application Development
    Zhou, Kun
    2023-09-01 | PDF
    Connected Vehicle (CV) communication technology (i.e., Vehicle-to-Everything, V2X) enables vehicles to "talk" to other vehicles on the road (Vehicle-to-Vehicle, V2V), roadside infrastructure (Vehicle-to-Infrastructure, V2I), vulnerable road users (Vehicle-to-Pedestrian, V2P), and the "cloud" (vehicle-to-network, V2N). The V2X connectivity will prov ...
  • Identification of Enhanced Moisture Susceptibility Testing for Asphalt Pavements Fact Sheet
    Identification of Enhanced Moisture Susceptibility Testing for Asphalt Pavements [Fact Sheet]
    Green, Roger ;
    Rodezno, Carolina
    2023-09-01 | PDF
    Over the years, efforts have been made to identify test procedures with appropriate moisture conditioning methods to quantify the potential of moisture susceptibility in asphalt mixtures. Some of the most commonly used test procedures include Modified Lottman Test (AASHTO T 283), Hamburg Wheel-Track Test (AASHTO T 324), and visual strip rating test ...
  • Connected and Automated Future of Transportation for Kansas
    Connected and Automated Future of Transportation for Kansas
    Aziz, H.M. Abdul ;
    Islam, A.M. Hasibul
    2023-09-01 | PDF
    The connected and automated vehicle (CAV) technologies will bring unprecedented changes in the landscape of transportation systems for areas like operations, management, and infrastructure needs. To assure a safe, reliable, and trustworthy connected and automated transportation system, it is important to have a clear CAV implementation pathway that ...
  • Performance Metric for Highway Avalanche Corridors
    Performance Metric for Highway Avalanche Corridors
    Gauthier, Dave ;
    Sala, Zac
    2023-09-01 | PDF
    A research project was initiated on behalf of the Colorado Department of Transportation (CDOT) and Transportation Avalanche Research Pool (TARP) to develop a metric for measuring the performance of highway avalanche management programs. The metric is meant to support resource allocation and other management decisions made by avalanche programs whil ...
  • Sensitivity Analysis of the IDEAL CT Test Using the Distinct Element Method Brief
    Sensitivity Analysis of the IDEAL CT Test Using the Distinct Element Method [Brief]
    Saadeh, Shadi ;
    El Asmar, Maria
    2023-09-01 | PDF
    Cracking is a primary mode of failure for asphalt concrete (AC), resulting in extensive road damage and deterioration which significantly leads to an increase in road hazards and fatalities. Therefore, understanding and studying the fracture behavior of AC provides an effective pathway to learn how to best enhance their cracking resistance, effecti ...
  • Update the Pile Design by CPT Software to Incorporate Newly Developed PileCPT Methods and Other Design Features
    Update the Pile Design by CPT Software to Incorporate Newly Developed Pile-CPT Methods and Other Design Features
    Abu-Farsakh, Murad ;
    Amirmojahedi, Mohsen
    2023-09-01 | PDF
    This study presents the performance evaluation of 21 direct pile-CPT methods for estimating the ultimate load carrying capacity of square precast prestressed concrete (PPC) piles driven into Louisiana soils utilizing the cone penetration test (CPT) data. The investigated methods are: Schmertmann, De Ruiter and Beringen, Bustamante and Gianeselli (L ...
  • DDOT Pilot Framework
    DDOT Pilot Framework
    Ricks, Karina ;
    Bridgford, Camron
    2023-09-01 | PDF
    The District Department of Transportation (DDOT) has a long history of supporting innovative pilot projects in service of its mission of enhancing transportation efficiency, safety, and sustainability. Pilot projects are a means to explore innovative ideas, strategies, and technologies on a limited scale before full-scale implementation. They allow ...
  • Guidelines for Optimizing Roadway CrossSection on Texas Highways
    Guidelines for Optimizing Roadway Cross-Section on Texas Highways
    Brewer, Marcus A. ;
    Geedipally, Srinivas
    2023-09-01 | PDF
    This project compiled and reviewed existing road cross-section guidance (for urban, suburban, and rural environments) from across the United States, along with research findings, to identify content that would be appropriate for inclusion in Texas-based guidelines for road cross-section optimization. A separate project task focused on considering t ...
  • Lightweight Deflectometer for Quality Assurance of Compacted Sublayers and Earthwork
    Lightweight Deflectometer for Quality Assurance of Compacted Sublayers and Earthwork
    Simon, Doug P ;
    LaBelle, Jacqueline
    2023-09-01 | PDF
    This report documents and presents the results of a study for implementation of lightweight deflectometer (LWD) testing for construction Quality Assurance (QA) in Alaska. The research evaluated empirical values, control strip testing, and laboratory testing to determine LWD target values. The results indicate control strip testing is the preferred ...
  • Update the Pile Design by CPT Software to Incorporate Newly Developed PileCPT Methods and Other Design Features Tech Summary
    Update the Pile Design by CPT Software to Incorporate Newly Developed Pile-CPT Methods and Other Design Features [Tech Summary]
    Abu-Farsakh, Murad ;
    Zhang, Zhongjie
    2023-09-01 | PDF
    This study presents the current research effort undertaken to identify the top-performed pile-CPT methods for accurately estimating the ultimate capacity of piles driven into Louisiana soils. Statistical analysis, Multidimensional Unfolding (MDU), and reliability analysis criteria were used to investigate the performance of 21 pile-CPT methods. The ...
  • An Evaluation of Wildlife Crossing Design Placement Costs and Funding Opportunities for Corridor Q
    An Evaluation of Wildlife Crossing Design, Placement, Costs, and Funding Opportunities for Corridor Q
    Donaldson, Bridget M ;
    Hillard, Elizabeth M
    2023-09-01 | PDF
    Construction is underway along Corridor Q, a 14-mile section of highway in Southwest Virginia that will open to traffic in stages from 2023 to 2027. Preliminary data indicated that a newly established reintroduced herd of elk regularly travels on and alongside the partially constructed road. The purpose of this study was to determine potential desi ...
  • Improving Design and Construction of Transportation Infrastructure through Bedrock Characterization 2023
    Improving Design and Construction of Transportation Infrastructure through Bedrock Characterization [2023]
    Ng, Kam W. ;
    Khatri, Lokendra
    2023-09-01 | PDF
    Tertiary bedrock formations are commonly encountered during the design and construction of transportation infrastructure in Wyoming. The engineering properties of these bedrocks are highly variable due to the geological processes to which they have been subjected including deposition, cementation, weathering and erosion. Furthermore, comprehensive ...
  • Optimizing of MassDOTs High Performance Asphalt Overlay HPOL Mixtures
    Optimizing of MassDOT’s High Performance Asphalt Overlay (HPOL) Mixtures
    Mogawer, Walaa S. ;
    Austerman, Alexander J.
    2023-09-01 | PDF
    The FHWA Targeted Overlay Pavement Solutions (TOPS) program presents innovative overlay solutions for asphalt and concrete pavements. The objective of this study was to conduct a comparative evaluation of three TOPS types for asphalt pavements (Asphalt Rubber Gap-Graded, Stone Matrix Asphalt, and High-Performance thin overlay) in terms of performan ...
  • US Department of Transportation Equity Action Plan 2023 Update
    U.S. Department of Transportation Equity Action Plan 2023 Update
    United States. Department of Transportation
    2023-09-01 | PDF
    DOT is committed to pursuing a comprehensive approach to advancing equity for all. The first DOT Equity Action Plan, in response to Executive Order 13985, was finalized in January 2022 as a major milestone for the Department that represented a shift in how the agency exercises its existing authorities and delivers transportation programs. Executive ...
  • Analysis of Benefits of UDOTs Expanded Incident Management Team Program
    Analysis of Benefits of UDOT’s Expanded Incident Management Team Program
    Schultz, Grant G. ;
    Hyer, Joel
    2023-09-01 | PDF
    In 2019, the Utah Department of Transportation (UDOT) funded a research study evaluating the performance measures of UDOT’s expanded Incident Management Team (IMT) program. The number of IMTs patrolling Utah roadways increased from 13 to 25 between 2018 and 2020. Crash data were collected from the Utah Highway Patrol’s Computer Aided Dispatch datab ...
  • Reducing Concrete Cure Times for Bridge Substructure Components and Box Culverts
    Reducing Concrete Cure Times for Bridge Substructure Components and Box Culverts
    Qadri, Faisal ;
    Garg, Nishant
    2023-09-01 | PDF
    This report investigated pathways to reduce concrete curing time while maintaining mechanical and durability performance. Among several options such as admixtures, supplementary cementitious materials, and low water-to-cement ratio, researchers explored two mix designs in a field demonstration project. For Stage I of the project, a low water-to-cem ...
  • GeoStatistical Deep Foundation Software Summary
    Geo-Statistical Deep Foundation Software [Summary]
    Herrera, Rodrigo ;
    Davidson, Michael
    2023-09-01 | PDF
    The objectives of this project were twofold: 1) to update GeoStat—the current geotechnical design software used by FDOT—to include site-specific considerations and 2) to hold demonstration sessions on using the updated software for in-house personnel as well as consultants.
  • Developing MassachusettsSpecific Trip Generation Models for Land Use Projects
    Developing Massachusetts-Specific Trip Generation Models for Land Use Projects
    Xie, Yuanchang ;
    Loesch, Brandon
    2023-09-01 | PDF
    Vehicle trip generation is used to identify potential transportation impacts associated with new development projects and to provide a substantive basis for determining appropriate impact mitigation strategies. In the United States, trip rate estimation typically relies on vehicle trip rates for specific land use types as provided in the Trip Gener ...
  • Artificial Intelligence AI Based Tool to Estimate Contract Time
    Artificial Intelligence (AI) Based Tool to Estimate Contract Time
    Jeong, H David ;
    Alikhani, Hamed
    2023-09-01 | PDF
    MDT is in the process of modernizing their contract time determination processes by developing user-friendly tools to facilitate the estimation process of project duration and contract time. As part of this modernization effort, a top-down project duration estimation tool was developed in this research project. This tool is particularly useful when ...
  • Assurance of Machine LearningBased Aerospace Systems Towards an Overarching PropertiesDriven Approach
    Assurance of Machine Learning-Based Aerospace Systems: Towards an Overarching Properties-Driven Approach
    Paul, Saswata ;
    Prince, Dan
    2023-09-01 | PDF
    Traditional process-based approaches of certifying aerospace digital systems are not sufficient to address the challenges associated with using Artificial Intelligence (AI) or Machine Learning (ML) techniques. To address this, agencies are evaluating an alternative Means of Compliance (MoC) called the Overarching Properties (OP). The goals for this ...
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