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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 2021 - 2040 of 35888 results
  • Asphalt Crack Treatment FAQs and Technical Resources
    Asphalt Crack Treatment FAQs and Technical Resources
    Knapek, Dan ;
    Boder, Brian
    2023-03-01 | PDF
    Crack treatment is one of the most used pavement preservation practices and although the technique is simple, there are several nuances that make it more of an art than science. The purpose of this document is to provide: • An overview of crack treatment, • Guidance on several FAQs, and • A high-level summary of several technical resources. Crack s ...
  • LiDAR for Geotechnical Applications Project Capsule
    LiDAR for Geotechnical Applications [Project Capsule]
    Gautreau, Gavin
    2023-03-01 | PDF
    The research intends to focus on four objectives regarding LiDAR within Louisiana Department of Transportation (DOTD) for geotechnical applications: (1) Site investigation and reconnaissance for drilling operations. LiDAR scans identifying slopes and feasible areas for drilling access could save time and efforts, possibly reducing site visits. (2) ...
  • UHPC Decked Ibeam for Accelerated Bridge Construction
    UHPC Decked I-beam for Accelerated Bridge Construction
    Morcous, George ;
    Tadros, Maher K.
    2023-03-01 | PDF
    Ultra-High-Performance Concrete (UHPC) is an excellent material for bridge construction due to its exceptional durability and superior mechanical properties. Several Departments of Transportations (DOTs), including NDOT, have limited the use of UHPC in bridge construction to joints and connections between bridge components due to the relatively hig ...
  • Construction and Materials Best Practices for Concrete Sidewalks Phase II LongTerm Performance and HotWeather Placement Effects
    Construction and Materials Best Practices for Concrete Sidewalks: Phase II – Long-Term Performance and Hot-Weather Placement Effects
    Peterman, Kara ;
    Brena, Sergio
    2023-03-01 | PDF
    This report summarizes the investigation of construction practices and materials to develop durable concrete sidewalks which can resist scaling damage caused by exposure to freezing environment and deicer application. Over 16 months, a field study accompanied by laboratory testing was conducted to identify factors that affect the performance and du ...
  • Evaluation of Coefficient Related to Runoff from Roadway Projects
    Evaluation of Coefficient Related to Runoff from Roadway Projects
    Guo, Qizhong (George) ;
    Miskewitz, Robert
    2023-03-01 | PDF
    New Jersey Department of Transportation (NJDOT) is required to quantify and mitigate the stormwater impacts of certain roadway projects. Acceptable runoff calculation methods include the Natural Resources Conservation Service Method and the Rational Method. Existing coefficients are often insufficient for representing land treatments utilized in ro ...
  • Evaluation of Coefficients Related to Runoff from Roadway Projects Technical Brief
    Evaluation of Coefficients Related to Runoff from Roadway Projects [Technical Brief]
    Guo, Qizhong (George) ;
    Miskewitz, Robert
    2023-03-01 | PDF
    The objective of this research project was to develop new curve numbers for four land treatments, bare soil, gravel, vegetation, and porous HMA, on top of subsoils with a series of hydraulic conductivities, typical of NJDOT highway projects.
  • Impact of Polymer Modification on IDEALCT and IFIT for Cracking Resistance Evaluation of Asphalt Mixtures
    Impact of Polymer Modification on IDEAL-CT and I-FIT for Cracking Resistance Evaluation of Asphalt Mixtures
    Yin, Fan ;
    Chen, Chen
    2023-03-01 | PDF
    This study evaluated the impact of polymer modification, without changing the base binder, on the intermediate-temperature cracking resistance of asphalt mixtures characterized using the Indirect Tensile Asphalt Cracking Test (IDEAL-CT) and the Illinois Flexibility Index Test (I-FIT). Twelve asphalt mixtures prepared with two mix designs and six vi ...
  • Offline and Realtime Evaluations of EasternShore Sensors With a Generalized Detection Performance Monitoring System
    Off-line and Real-time Evaluations of Eastern-Shore Sensors With a Generalized Detection Performance Monitoring System
    Lin, Yi-Ting ;
    Chen, Yen-Hsiang
    2023-03-01 | PDF
    The primary objectives of this study are to develop a detector performance monitoring system for both off-line and on-line applications, and to implement such a system for the Eastern Shore region’s current and proposed sensors, including: evaluate the data quality and reliability of the six sensors deployed in the Eastern Shore region; assess the ...
  • Methods for Increasing Missouris Passenger Rail Business Revenues
    Methods for Increasing Missouri’s Passenger Rail Business Revenues
    Waldt, Peter ;
    Atallah, Stephanie
    2023-03-01 | PDF
    This research identifies opportunities to enhance revenue including yield management, creative fare schemes and campaigns, partnerships attractions and institutions. As part of this effort, the authors interviewed overseas rail operators to provide examples of revenue enhancement as well as operators such as Brightline and Amtrak to identify exampl ...
  • Promoting Native Roadside Plant Communities and Ensuring Successful Vegetation Establishment Practices
    Promoting Native Roadside Plant Communities and Ensuring Successful Vegetation Establishment Practices
    Askew, Shawn D ;
    Goatley, James M
    2023-03-01 | PDF
    The loss of vegetation from roadside activities can lead to erosion and an increased sediment load in stormwater ponds. Current VDOT procedures regarding approved seed blends and establishment practices have led to inconsistent vegetation establishment and greatly rely on introduced species. Growing concerns regarding the threat of introduced, inva ...
  • Engineered Log Jam Monitoring Along NH Route 16 in Errol New Hampshire
    Engineered Log Jam Monitoring Along NH Route 16 in Errol, New Hampshire
    Ballestero, Thomas P. ;
    Ballestero, Joel C
    2023-03-01 | PDF
    Many roads and highways exist close to streams that exhibit lateral instability (bank erosion). Conventional practices are to armor such locations, and these solutions are expensive, do not provide ecosystem value, and result in high mitigation fees. Natural channel design structures, such as engineered log jams, offer a greener, less expensive alt ...
  • Evaluation and Refinement of Minnesota Queue Warning Systems
    Evaluation and Refinement of Minnesota Queue Warning Systems
    Hourdos, John ;
    Robbennolt, Jake
    2023-03-01 | PDF
    In previous research, investigators developed and deployed two warning systems, including MN-QWARN, which was installed on a segment of Interstate 94 (I-94) with a historically high crash rate. This system targeted shockwaves or initial stages of congestion based on the understanding that not all congestion events create high risks for crashes. Cer ...
  • Assessing a Solar Project and a Virtual Power Purchase Agreement Between the Red Lake Nation and the Minnesota Department of Transportation
    Assessing a Solar Project and a Virtual Power Purchase Agreement Between the Red Lake Nation and the Minnesota Department of Transportation
    Chan, Gabriel ;
    Harrington, Elise
    2023-03-01 | PDF
    In this report, we analyze the feasibility of a northern Minnesota solar project and accompanying Virtual Power Purchase Agreement (VPPA) between the Minnesota Department of Transportation (MnDOT) and the Red Lake Nation. We analyze three sets of benefits for MnDOT: government-to-government relations, environmental, and economic. In government-to-g ...
  • Alternative Transit Approaches for Rural Communities
    Alternative Transit Approaches for Rural Communities
    Fisher, Thomas
    2023-03-01 | PDF
    Innovative or nontraditional transportation programs and platforms have emerged for rural communities, largely fueled by digital technology. Public-private partnerships, car- or bike-shar?ing, and other local networks offer promising solutions to meet rural transit needs more equitably and efficiently. In addition to benefiting underserved populati ...
  • Improving and Expanding the Queue Warning System
    Improving and Expanding the Queue Warning System
    Hourdos, John
    2023-03-01 | PDF
    In previous research, investigators developed and deployed two warning systems, including MN-QWARN, which was installed on a segment of Interstate 94 (I-94) with a historically high crash rate. This system targeted shockwaves or initial stages of congestion based on the understanding that not all congestion events create high risks for crashes. Cer ...
  • US Department of Transportation Capacity Assessment
    U.S. Department of Transportation Capacity Assessment
    United States. Department of Transportation  ...
    2023-03-01 | PDF
    In accordance with the Foundations for Evidence-Based Policymaking Act of 2018, Public Law No. 115-435 (Evidence Act), the United States Department of Transportation (DOT or the Department) is pleased to present the Capacity Assessment. The following report assesses DOT’s research, statistics, and evaluation capabilities based on a number of criter ...
  • Pilot Design Build Program Evaluation Research Brief
    Pilot Design Build Program Evaluation [Research Brief]
    Qin, Xiao ;
    Gottlieb, Mark
    2023-03-01 | PDF
    Historically, apart from a very limited number of specifically authorized exceptions, WisDOT has been required to utilize the design-bid-build method of project delivery. Over the years, several studies have been undertaken, and proposals made, to expand the department’s authority to utilize alternative methods of project delivery, including design ...
  • Evaluation of Level 34 Intelligent Compaction Measurement Values ICMV for Soils Subgrade and Aggregate Subbase Compaction
    Evaluation of Level 3-4 Intelligent Compaction Measurement Values (ICMV) for Soils Subgrade and Aggregate Subbase Compaction
    Chang, George K ;
    TaghaviGhalesari, Abbas
    2023-03-01 | PDF
    Intelligent compaction (IC) is a roller-based innovative technology that provides real-time compaction monitoring and control. IC can monitor roller passes, vibration frequencies/amplitudes, and stiffness-related values of compacted materials or intelligent compaction measurement Values (ICMV). Various ICMVs have been introduced since 1978. Based o ...
  • 2022 Maryland Commuter Survey
    2022 Maryland Commuter Survey
    Harvey, Chester ;
    Shokputov, Alibi
    2023-03-01 | PDF
    The Maryland Commuter Survey (MCS) is a new survey of adult workers in Maryland designed to measure annual trends in commuting and remote work. The 2022 MCS is its first iteration, providing baseline understanding of commuting rates and patterns as Maryland exits the COVID-19 pandemic. This survey and future iterations will shed light on topics inc ...
  • Inlet Protection Comparison for Sediment Control on Roadway Construction Fact Sheet
    Inlet Protection Comparison for Sediment Control on Roadway Construction [Fact Sheet]
    Tangirala, Anil ;
    Kerns, Justin
    2023-03-01 | PDF
    The Inlet Protection Comparison for Sediment Control on Roadway Construction research project intends to provide Ohio Department of Transportation (ODOT) with performance data associated with key criteria for manufactured inlet protection devices in order to assess which products are appropriate for inlet sediment controls on ODOT roadway construct ...
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