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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 3501 - 3520 of 36908 results
  • Measuring Foundation Course Modulus Using Falling Weight Deflectometer Light Weight Deflectometer and Dynamic Cone Penetration
    Measuring Foundation Course Modulus Using Falling Weight Deflectometer, Light Weight Deflectometer, and Dynamic Cone Penetration
    Barrett, Bruce ;
    Troxel, Kellie
    2021-12-01 | PDF
    There have been attempts in the past to forensically evaluate subgrade and foundation course strength that underly concrete pavement by Falling Weight Deflectometer (FWD) testing on top of doweled concrete. The accuracy of these data is unknown. The Falling Weight Deflectometer is a trailer mounted, non-destructive testing device that drops a weigh ...
  • Refining Inductive Loop Signature Technology for Statewide Vehicle Classification Counts
    Refining Inductive Loop Signature Technology for Statewide Vehicle Classification Counts
    Liao, Chen-Fu
    2021-12-01 | PDF
    Transportation agencies in the U.S. use devices such as loop detectors, automatic traffic recorders (ATR), or weigh-in- motion (WIM) sensors to monitor the performance of traffic network for planning, forecasting, and traffic operations. With a limited number of ATR and WIM sensors deployed throughout the state roadways, temporary double tubes are ...
  • Field Evaluation of Hardening Methods for Subsurface Utilities and Drainage Pipes
    Field Evaluation of Hardening Methods for Subsurface Utilities and Drainage Pipes
    Hosseini, Payam ;
    Faeli, Zahra
    2021-12-01 | PDF
    A new field monitoring approach in the form of metallic capsules is developed to evaluate Benzene and PCE diffusion through concrete pipe gaskets. The capsules are developed and tested with three gasket materials: Neoprene, Buna-N, and Viton. To validate the monitoring approach and develop field retrieval protocol, capsules were deployed in three c ...
  • Bridge and Culvert Deterioration Models Using National Bridge Inventory Data
    Bridge and Culvert Deterioration Models Using National Bridge Inventory Data
    Weissmann, José ;
    Weissmann, Angela Jannini
    2021-12-01 | PDF
    This project developed and tested 44 bridge and 12 culvert deterioration models. Out of these, 38 bridge and 8 culvert models were validated and implemented into 9 Excel workbooks, where forecasts can be updated with new inspections. The 3 National Bridge Inventory (NBI)/PonTex bridge ratings: deck, superstructure and substructure (respectively Ite ...
  • Brace for Impact The Environmental and Economic Effects of Shifting Passenger Travel from Airplanes to HighSpeed Rail
    Brace for Impact: The Environmental and Economic Effects of Shifting Passenger Travel from Airplanes to High-Speed Rail
    Karpman, Jason
    2021-12-01 | PDF
    This research synthesis surveys recent literature from 2011 to 2020 on the environmental and economic effects of high-speed rail (HSR) projects from across the globe, with relevant lessons for implementation of the California High-Speed Rail (CAHSR) project. Recent literature shows that—under the right conditions—HSR can lead to both environmental ...
  • Implementation Study Continuous Wireless Data Collection and Monitoring of the Sagamore Parkway Bridge
    Implementation Study: Continuous, Wireless Data Collection and Monitoring of the Sagamore Parkway Bridge
    Raja, Rameez Ali ;
    Kilic, Mustafa
    2021-12-01 | PDF
    This report presents, in detail, the development and implementation of a wireless solar powered DAQ system for continuous real-time monitoring of the Sagamore Parkway Bridge using the data collected from strain gauges installed in the bridge pier and its foundation piles. The data analysis showed that there is no significant change in the load-sett ...
  • Designing for Deck Stress Over Precast Panels in Negative Moment Regions
    Designing for Deck Stress Over Precast Panels in Negative Moment Regions
    Ge, Xiaomeng ;
    Munsterman, Keaton
    2021-12-01 | PDF
    With increases in the use of precast concrete panels (PCPs) in Texas bridges, ensuring acceptable deck cracking behavior is of paramount importance to avoid long-term maintenance problems. The purpose of this study is to understand the cracking behavior of reinforced concrete bridge decks with precast concrete panels in the negative moment regions ...
  • SelfHealing Cementitious Composites SHCC with Ultrahigh Ductility for Pavement and Bridge Construction
    Self-Healing Cementitious Composites (SHCC) with Ultrahigh Ductility for Pavement and Bridge Construction
    Huang, Cihang ;
    Su, Yen-Fang
    2021-12-01 | PDF
    Cracks and their formations in concrete structures have been a common and long-lived problem, mainly due to the intrinsic brittleness of the concrete. Concrete structures, such as rigid pavement and bridge decks, are prone to deformations and deteriorations caused by shrinkage, temperature fluctuation, and traffic load, which can affect their servi ...
  • BirdLong Island Management Study Phase 2A Enhancement and Restoration Interventions for BirdLong Island Shoreline Alternatives Design and Modeling for Stewardship
    Bird-Long Island Management Study Phase 2A: Enhancement and Restoration Interventions for Bird-Long Island Shoreline Alternatives: Design and Modeling for Stewardship
    Alexander, Clark ;
    Calabria, Jon
    2021-12-01 | PDF
    This study evaluated a variety of design interventions using nature-based solutions to preserve a culture resource on Bird-Long Island and promote indigenous vegetative communities by maintaining or increasing vegetative biodiversity. Several alternatives were proposed that utilized a combination of green and gray infrastructure, such as living sho ...
  • INDOT Research Program Benefit Cost AnalysisReturn on Investment for Projects Completed in FY 2020
    INDOT Research Program Benefit Cost Analysis—Return on Investment for Projects Completed in FY 2020
    McCullouch, Bob
    2021-12-01 | PDF
    To demonstrate the value of research and its implementation, the Governor’s Office requested an annual financial analysis of the Indiana Department of Transportation (INDOT) Research Program to determine the return on the research investment (ROI). The current financial analysis is for 11 research projects that completed in FY 2020. Analyses on pre ...
  • Determination of Pavement Surface Type
    Determination of Pavement Surface Type
    Sabillon, Christian ;
    Inoue, Danilo
    2021-12-01 | PDF
    This study evaluated and developed machine learning models for pavement surface classification to enhance accuracy and reliability using advanced computational techniques. Initially, a detailed literature review on pavement texture and measurement methods provided a foundation for developing a prototype system. This system, integrating laser scanne ...
  • CostEffective Detection and Repair of Moisture Damage in Pavements
    Cost-Effective Detection and Repair of Moisture Damage in Pavements
    Elseifi, Mostafa A. ;
    Dhakal, Nirmal
    2021-12-01 | PDF
    The major objective of this study was to evaluate the use of non-destructive evaluation (NDE) test methods to identify moisture damage in the field, to classify surface cracking in flexible pavements as top-down or bottom-up cracking, and to predict roughness conditions from surface images. NDE test methods evaluated in this study included Traffic ...
  • Numerical Modeling of the Test Pit for Falling Weight Deflectometer Calibration
    Numerical Modeling of the Test Pit for Falling Weight Deflectometer Calibration
    Sadeghiamirshahidi, Mohammadhossein ;
    Speece, Marvin
    2021-11-24 | PDF
    Montana Department of Transportation (MDT) planned to replace the soft clay layer of their test pit for Falling Weight Deflectometer (FWD) calibration with a geofoam layer hoping to increase the operational lifetime of the test pit. In this research, the possibility of replacing the clay layer with a geofoam layer was investigated using dynamic res ...
  • AERMOD RLINE and RLINEXT Case Study Analyses in Atlanta Georgia
    AERMOD, RLINE, and RLINEXT Case Study Analyses in Atlanta, Georgia
    Guensler, Randall ;
    Lu, Hongyu
    2021-11-05 | PDF
    This research assessed the impact of USEPA's AERMOD dispersion model (version of 19191) source types on predicted pollutant concentrations via a case study for the I-75/I-575 Northwest Corridor (NWC) in Atlanta, GA. Using MOVES-Matrix for MOVES 2014b, carbon monoxide (CO) emissions rates for every hour of a one-year study period were generated usin ...
  • Intersection Modifications Using MiniModularRoundabouts
    Intersection Modifications Using Mini-/Modular-Roundabouts
    Naik, Bhaven ;
    Dey, Kakan Chandra
    2021-11-01 | PDF
    Conversion of traditional intersections (stop controlled and signalized) to modern RABs has been a growing practice in many countries around the world including the U.S. – largely due to the benefits of reduction in crash frequency and severity, capacity improvement, and operational improvement. However, construction of traditional RABs is costly a ...
  • Strategic Deployment of Drone Centers and Fleet Size Planning for Drone Delivery
    Strategic Deployment of Drone Centers and Fleet Size Planning for Drone Delivery
    Sacharny, David ;
    Liu, Xiaoyue Cathy
    2021-11-01 | PDF
    This research project produces a statewide airspace network, delivery schedule, and truck/drone fleet mix. The airspace network is optimized to ensure that drones are strategically deconflicted as required by NASA and the total energy over that day is minimized. Such an airspace network is realized in a web-based platform, named the Utah Advanced A ...
  • Noise ModeltoMonitor Case Study Fact Sheet
    Noise Model-to-Monitor Case Study [Fact Sheet]
    Sperry, Benjamin R. ;
    Destocki, Devon
    2021-11-01 | PDF
    The ORITE team utilized a multi-part approach to addressing the research problem, including literature review, field traffic noise data collection, statistical analysis, and modeling of the traffic noise using the TNM software package.
  • Assessing the Incorporation of Racial Equity into Analytical and Modeling Practices in Transportation Planning
    Assessing the Incorporation of Racial Equity into Analytical and Modeling Practices in Transportation Planning
    Ong, Paul M. ;
    Bryant, Chelsey
    2021-11-01 | PDF
    This report examines if and to what extent state-level transportation departments in four states incorporate race and equity considerations into transportation planning technical analyses and modeling practices, particularly for long-range transportation plans, and how such equity-infused practices can be improved. The research team examined releva ...
  • Sanitization of Transportation Data Policy Implications and Gaps
    Sanitization of Transportation Data: Policy Implications and Gaps
    Bishop, Matt
    ORCID ICON IMG
    2021-11-01 | PDF
    Data about mobility provides information to improve city planning, identify traffic patterns, detect traffic jams, and route vehicles around them. This data often contains proprietary and personal information that companies and individuals do not wish others to know, for competitive and personal reasons. This sets up a paradox: the data needs to be ...
  • Integration of Probe Data Tools into TMC Operations
    Integration of Probe Data Tools into TMC Operations
    Mathew, Jijo K ;
    Li, Howell
    2021-11-01 | PDF
    With the advent of probe data, there is a need to virtualize many of the Traffic Management Center (TMC) tools used for analyzing work zones, severe crashes, winter operations, moving maintenance operations, and providing dashboards characterizing overall system mobility. Traditional tools have evolved over the past several years and it is importan ...
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