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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 1621 - 1640 of 35865 results
  • STAR InRoad Electric Vehicle Charging for Parked Vehicles Fact Sheet
    STAR In-Road Electric Vehicle Charging for Parked Vehicles [Fact Sheet]
    Abdulhamed, Bilal ;
    Alavizadeh, Hootan
    2023-09-01 | PDF
    The global electric vehicle (EV) market is forecasted to grow by 24.3% till 2028 constantly. However, the development in charging infrastructure is still lagging behind that, hindering the EV's widespread application, i.e., 30 million chargers are still needed to support the existing EV demand. Also, based on the survey by Witricity, 86% of EV owne ...
  • 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 ...
  • Efficacy Costs and Impacts of NonChloride Deicers An Educational Primer and Product Information Sheets
    Efficacy, Costs, and Impacts of Non-Chloride Deicers: An Educational Primer and Product Information Sheets
    Fay, Laura ;
    Clouser, Karalyn
    2023-09-01 | PDF
    The objective of this project was to synthesize available information on non-chloride deicers to allow for a more comprehensive understanding by winter roadway maintenance professionals and allow for easy comparisons between products and with sodium chloride (as salt brine or rock salt). This was accomplished through a literature search that summar ...
  • Next Generation LifeCycle Cost Analysis Tool for Bridges in Iowa Phase II
    Next Generation Life-Cycle Cost Analysis Tool for Bridges in Iowa – Phase II
    Alipour, Alice ;
    Shafei, Behrouz
    2023-09-01 | PDF
    To meet the requirements of the Moving Ahead for Progress in the 21st Century (MAP-21) Act of 2012, a life-cycle cost analysis management (LCCAM) tool was developed to manage the maintenance actions of the portion of National Highway System (NHS) for the Iowa Department of Transportation (DOT). The LCCAM software that was developed with the coopera ...
  • Next Generation LifeCycle Cost Analysis Tool for Bridges in Iowa Phase II Tech Transfer Summary
    Next Generation Life-Cycle Cost Analysis Tool for Bridges in Iowa – Phase II [Tech Transfer Summary]
    Alipour, Alice ;
    Shafei, Behrouz
    2023-09-01 | PDF
    The overarching goal of this project was to upgrade the life-cycle cost analysis management (LCCAM) software tool for continued use by the Iowa Department of Transportation (DOT). Specific objectives were as follows: • Integrate road user cost calculations into the software without disrupting the current maintenance management procedure for bridge ...
  • Design and Behavior of Seamless BridgePavement Systems
    Design and Behavior of Seamless Bridge-Pavement Systems
    Chen, Xiaoyi ;
    Malviya, Jay
    2023-09-01 | PDF
    The seamless bridge concept eliminates expansion joints on the bridge deck and joints between the bridge and approach, which can significantly reduce the maintenance costs and improve the long-term durability of the primary load-carrying components. Past applications of seamless bridges have utilized Continuously Reinforced Concrete Pavement (CRCP) ...
  • Leveraging Artificial Intelligence AI Techniques to Detect Forecast and Manage Freeway Congestion Technical Report
    Leveraging Artificial Intelligence (AI) Techniques to Detect, Forecast, and Manage Freeway Congestion: Technical Report
    Das, Subasish ;
    Tsapakis, Ioannis
    2023-09-01 | PDF
    Enhancing the quality and efficiency of the Texas surface transportation system necessitates reliable predictions about the initiation and dispersion of prolonged congestion, as well as effective tracking of atypical events and their potential evolution. Artificial intelligence (AI) offers a unique avenue for achieving these goals, presenting an op ...
  • Artificial Intelligence AI Based Tool to Estimate Contact Time
    Artificial Intelligence (AI) Based Tool to Estimate Contact 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 ...
  • Enhancing Freeway Safety Prediction Models Technical Report
    Enhancing Freeway Safety Prediction Models: Technical Report
    Pratt, Michael P. ;
    Geedipally, Srinivas R.
    2023-09-01 | PDF
    Safety prediction models have been developed for urban freeway segments in Texas and elsewhere to apply to cross sections up to 10 lanes wide. These models are documented resources such as TxDOT’s Roadway Safety Design Workbook and the Highway Safety Manual and applied in several spreadsheet-based analysis tools. These tools are acknowledged in the ...
    Supporting Files
  • Continuous Moisture Measurement during Pavement Foundation Construction
    Continuous Moisture Measurement during Pavement Foundation Construction
    Baker, Mark ;
    Zuniga, Isaac E
    2023-09-01 | PDF
    The variations in electromagnetic and electric properties with the moisture content of several geomaterials were assessed in this report to demonstrate their viability in estimating the moisture content of compacted geomaterials. A prototype device was also designed and fabricated to estimate the moisture content of compacted geomaterials by measur ...
  • RightTurn Safety for WalkingBicycling Impacts of CurbCorner Radii and Other Factors
    Right-Turn Safety for Walking/Bicycling: Impacts of Curb/Corner Radii and Other Factors
    Singleton, Patrick A. ;
    Mekker, Michelle
    2023-09-01 | PDF
    The objective of this research project is to understand factors (especially curb/corner radii) affecting safety at intersections involving right-turning vehicles and pedestrians/bicyclists. A mixed-methods approach was used, combining crash data analysis with analysis of observational video data. For the crash analysis, data were assembled about mo ...
  • Effective JumpOuts for WhiteTailed Deer and Mule Deer
    Effective Jump-Outs for White-Tailed Deer and Mule Deer
    Huijser, Marcel P. ;
    Getty, Samantha C
    2023-09-01 | PDF
    The height of jump-outs along a fenced road corridor should be low enough for the target species to readily jump down from the fenced road corridor to the safe side, or the habitat side, of the fence. At the same time, the jump-outs should be high enough to discourage animals from jumping from the habitat side of the fence up into the fenced road c ...
  • Identification of Enhanced Moisture Susceptibility Testing for Asphalt Pavements
    Identification of Enhanced Moisture Susceptibility Testing for Asphalt Pavements
    Green, Roger ;
    Rodezno, Carolina
    2023-09-01 | PDF
    The Tensile Strength Ratio (TSR) test is the most widely used test by state agencies based on a survey and specification review. The next most widely used test is the Hamburg Wheel-Track Test (HWTT). The survey also found there has been a move from the TSR test to the HWTT by state agencies over the last 10 years. Limited TSR and HWTT testing for t ...
  • 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 ...
  • Best Practices for Construction Site Stormwater Treatment Using Flocculants
    Best Practices for Construction Site Stormwater Treatment Using Flocculants
    Kazaz, Billur ;
    Clampitt, Jannell
    2023-09-01 | PDF
    Unmanaged construction stormwater runoff can pose a risk for the quality of downstream water bodies. Temporary sediment control practices are designed to capture sediment particles and reduce the turbidity of discharge; however, commonly used practices have limited performance in capturing fine-sized sediment particles. Flocculants can be introduce ...
  • Testing Protocol Data Storage and Recalibration for PavementME Design
    Testing Protocol, Data Storage, and Recalibration for Pavement-ME Design
    Haider, Syed Waqar ;
    Kutay, M. Emin
    2023-09-01 | PDF
    This study focuses on calibrating and validating performance models for pavement in Michigan and provides testing protocols for field and laboratory material testing. The research team selected various new and rehabilitation projects for flexible and rigid pavements to evaluate previous calibration efforts, verify global models in the Pavement-ME, ...
  • Ohios Research Initiative for Locals ORIL Research OnCall Task 6 An Experimental Study on the Influence of Polyester Fibers Plastic Glass and Tire Waste on LowStrength Concrete Performance
    Ohio’s Research Initiative for Locals (ORIL) Research On-Call Task 6 – An Experimental Study on the Influence of Polyester Fibers, Plastic, Glass, and Tire Waste on Low-Strength Concrete Performance
    Khoury, Issam ;
    Green, Roger
    2023-09-01 | PDF
    Spearheaded by Defiance County, the research to develop a cost-efficient, flexible concrete mix was carried out by Ohio University's Departments of Civil and Environmental Engineering. The study explored the integration of locally-sourced waste materials—tire shreds, fiberglass, polyester fiber, and plastic waste—into the concrete mix. Rigorous tes ...
  • Evaluation of Messaging Techniques to Increase Vehicle Spacing at Work Zones
    Evaluation of Messaging Techniques to Increase Vehicle Spacing at Work Zones
    Oh, Minsoo ;
    Shaw, John
    2023-09-01 | PDF
    Rear-end collisions in work zones, induced primarily by speeding and tailgating, are a predominant concern for roadway safety. Although considerable research has shed light on the dangers and implications of speeding within these zones, there exists a conspicuous research gap on tailgating behaviors. To address this gap, the present project was con ...
  • Performance of Skewed Reinforcing in InvertedT Bridge Caps Project Summary Report
    Performance of Skewed Reinforcing in Inverted-T Bridge Caps [Project Summary Report]
    Mo, Y.L. ;
    Joshi, Bhagirath
    2023-08-31 | PDF
    In this research, two significant ITBCs are selected to investigate the structural performance of skew reinforcing. The global models for ITBC 2 (skew angle 430) and ITBC 7 (skew angle 330) are established with four columns, I-girders in the forward and backward span, and a deck. Each ITBC is simulated in 15 cases of Static Test-1. Further, two cri ...
  • 07060 Measuring Faulting on Jointed Concrete Pavements Summary
    0-7060: Measuring Faulting on Jointed Concrete Pavements [Summary]
    Prozzi, Jorge A. ;
    Li, Ruohan
    2023-08-31 | PDF
    Current equipment to measure faulting of jointed concrete pavements at the network level is ineffective and inefficient. One the one hand, joint detection at high speeds is challenging. On the other hand, the actual measurement is not accurate and fails to capture the transverse variability of faulting. In this project, a high- definition, high-spe ...
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