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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 2981 - 3000 of 36873 results
  • Detecting Foundation Pile Length of HighMast Light Towers
    Detecting Foundation Pile Length of High-Mast Light Towers
    Kennedy, Daniel ;
    D'Agostino, Mollie
    2022-08-01 | PDF
    The goal of the project is to establish a non-destructive field testing technique, including a data analysis algorithm, for determining in-place pile lengths by way of seismic waves. The length of each pile supporting a high-mast light tower (HMLT) will be identified through a systematic sensing approach that includes (i) collection and classificat ...
  • Statewide Implementation of New Binder Selection Catalog and New Binder Performance Tests Project Summary Report
    Statewide Implementation of New Binder Selection Catalog and New Binder Performance Tests [Project Summary Report]
    Zhou, Fujie ;
    Hu, Sheng
    2022-07-31 | PDF
    This project evaluated many softer but polymer-modified asphalt binders (PGxx-28 and PGxx-34) in both laboratory and field test sections. Binder tests, such as the multiple stress creep recovery (MSCR), linear amplitude sweep (LAS), and pure linear amplitude sweep (PLAS), were performed to evaluate binders’ rutting and cracking resistance. Mixture ...
  • Local Technical Assistance Program Support on ComputerBased FDOT Intersection Control Evaluation ICE Training
    Local Technical Assistance Program Support on Computer-Based FDOT Intersection Control Evaluation (ICE) Training
    Chen, Cong ;
    Lin, Pei-Sung
    2022-07-31 | PDF
    Florida is among the top states in the U.S. regarding intersection-related traffic fatalities, and the Florida Strategic Highway Safety Plan (SHSP) identified intersection safety as one of the Emphasis Areas. The Florida Department of Transportation (FDOT) has developed an Intersection Control Evaluation (ICE) manual and conducted in classroom ICE ...
  • Concrete Deterioration of Prestressed Bridge Beams
    Concrete Deterioration of Prestressed Bridge Beams
    Attanayake, Upul ;
    Berke, Neil
    2022-07-31 | PDF
    The mild to significant concrete deterioration observed on many prestressed concrete (PSC) beam bridges constructed in the 1970’s and 1980’s was suspected to be due to alkali-aggregate reactivity (AAR) and other material compatibility issues. The inventory analysis and field inspections identified a total of 136 I-beam bridges (~12% of the I-beam b ...
  • Quantify the Valuation of RightofWay Project Summary
    Quantify the Valuation of Right-of-Way [Project Summary]
    Kraus, Edgar ;
    Holik, William
    2022-07-31 | PDF
    The goal of this research was twofold. First, researchers sought to develop a valuation framework for the right-of-way that could be used to assess fees for leases with private parties. The fees must consider different types, lengths, durations, and locations of installations by third parties. The second goal was to determine the prevalence of thir ...
  • Use of Roundabouts and Innovative Intersection Designs at HighSpeed Intersections in Texas Project Summary
    Use of Roundabouts and Innovative Intersection Designs at High-Speed Intersections in Texas [Project Summary]
    Brewer, Marcus A. ;
    Fitzpatrick, Kay
    2022-07-31 | PDF
    Innovative intersection designs (e.g., diverging diamond interchanges [DDIs], displaced left turns [DLTs], median U-turns [MUTs], and restricted crossing U-turns [RCUTs]) and modern roundabouts have been used successfully to remove conflict points and redistribute turning traffic from traditional intersections. However, minimal guidance exists on u ...
  • BFRP Rebar Characterization and Performance Testing Protocol and Material Specifications for Basalt Fiber Reinforced Polymer Bars
    BFRP Rebar Characterization and Performance: Testing Protocol and Material Specifications for Basalt Fiber Reinforced Polymer Bars
    Kampmann, Raphael ;
    Tang, Youneng
    2022-07-30 | PDF
    This research was conducted to evaluate the performance of three commercially available BFRP rebar products and their individual raw material components, before and after exposure to nine different aggressive environments at 60°C for 300d and 600d, to development acceptance criteria specifically for basalt-based fiber reinforced polymer (BFRP) rein ...
  • Integration of Stated Preference and Revealed Preference Methods in Regional Travel Survey Programs Workshop
    Integration of Stated Preference and Revealed Preference Methods in Regional Travel Survey Programs: Workshop
    Bhat, Chandra ;
    Asmussen, Katherine
    2022-07-21 | PDF
    The research team (PA) will (1) identify state-of-the-art stated preference (SP) techniques, (2) develop a guidebook that explains the factors to consider when designing an integrated revealed preference (RP)-SP survey, (3) recommend to TxDOT the SP components that may be appended to existing surveys to enhance their use for long-term travel foreca ...
  • Improving Concrete Patching Practices on Iowa Roadways
    Improving Concrete Patching Practices on Iowa Roadways
    Nelson, Todd D. ;
    Pham, Le T.
    2022-07-08 | PDF
    This research effort aims to improve pavement patching practices in Iowa by identifying best practices used for portland cement concrete (PCC) pavement repairs in the upper Midwestern United States and by developing guidelines and tools for improved materials selection, repair installation, and quality assurance and quality control (QA/QC) of full- ...
  • Factors Affecting Development Decisions and Construction Delay of Housing in TransitAccessible and JobsRich Areas in California
    Factors Affecting Development Decisions and Construction Delay of Housing in Transit-Accessible and Jobs-Rich Areas in California
    Marantz, Nicholas J ;
    Houston, Douglas
    2022-07-01 | PDF
    Recent state legislation addresses California’s housing affordability crisis by encouraging new development in transit accessible and/or jobs-rich areas. But policymakers lack key information about the effects of laws and plans on developers’ decisions about whether and where to build housing, and factors contributing to delays in receiving governm ...
  • Fatigue Life of Double Notch Alloy Steel Breakaway Couplings
    Fatigue Life of Double Notch Alloy Steel Breakaway Couplings
    Hahin, Christopher
    2022-07-01 | PDF
    Double notch alloy steel breakaway couplings have sustained numerous fatigue failures during their service life in Illinois. This report is an in-depth analysis of breakaway couplings that ruptured, resulting in collapse of a light pole falling across a 55-mph expressway. Pole was fortunately cleared away by maintenance before any collisions occurr ...
  • Estimating Strength From Stiffness for Chemically Treated Soils
    Estimating Strength From Stiffness for Chemically Treated Soils
    Shivakumar, Pranavkumar ;
    Gupta, Kanika
    2022-07-01 | PDF
    The central theme of this study is to identify strength-stiffness correlations for chemically treated subgrade soils in Indiana. This was done by conducting Unconfined Compression (UC) Tests and Resilient Modulus Tests for soils collected at three different sites—US-31, SR-37, and I-65. At each site, soil samples were obtained from 11 locations at ...
  • Performance of Wicking Geotextile H2Ri To Mitigate Pavement Pumping Phase 2
    Performance of Wicking Geotextile (H2Ri) To Mitigate Pavement Pumping – Phase 2
    Galinmoghadam, Javad ;
    Zhang, Xiong
    2022-07-01 | PDF
    Pumping is one of the major factors contributing to pavement failures, which reduces the pavement life, affects road safety, and increases maintenance costs. Existing methods that are used as drainage systems can drain gravitational (free) water undersaturated conditions but not the capillary water under an unsaturated condition. The objective of t ...
  • Design of an Evaluation Plan for Senate Bill 1046
    Design of an Evaluation Plan for Senate Bill 1046
    Chierichetti, Maria ;
    Moghadam, Armin
    2022-07-01 | PDF
    In an effort to understand and decrease alcohol-impaired driving as a primary collision factor In California, the research team designed an evaluation plan for California Senate Bill 1046 and its focus on ignition interlock devices as a sentence for Driving Under Influence offense. This plan will evaluate whether Senate Bill 1046 affected the Drivi ...
  • Division of Engineering Services Research OnCall Agreement 34652 Task 6 Noise Barrier Foundation Design
    Division of Engineering Services Research On-Call Agreement #34652. Task #6, Noise Barrier Foundation Design
    Narsavage, Peter
    ORCID ICON IMG
    2022-07-01 | PDF
    The Ohio Department of Transportation (ODOT) wishes to develop a design method for drilled shaft foundations of noise barriers, using the software program LPILE. To accomplish this task, the research team performed the following activities: 1) Determine appropriate design loads and design criteria, 2) Review and evaluate soil strength correlations ...
  • Employing a Modified Delphi Approach To Explore Scenarios for Californias Transportation and Land Use Future
    Employing a Modified Delphi Approach To Explore Scenarios for California’s Transportation and Land Use Future
    Gahbauer, John ;
    Wasserman, Jacob L.
    2022-07-01 | PDF
    There are many methods for engaging experts in interactive groups to explore, clarify, and/or decide on various issues. In an investigation of possible future transportation and land use scenarios for California, we used techniques common to several methods and developed our own variation, a “hybrid policy Delphi,” for use with a panel of 18 expert ...
  • Assessing and Improving the Application of Multimodal Performance Measures in WSDOT Projects
    Assessing and Improving the Application of Multimodal Performance Measures in WSDOT Projects
    Arabkhedri, Borna ;
    Malarkey, Daniel
    2022-07-01 | PDF
    This report assesses the application of multimodal performance measures and indicators in WSDOT’s design process. It characterizes the “state of the knowledge” as reflected in the scholarly research on how best to achieve multimodal goals in projects. It characterizes the “state of the practice” by reviewing the design manuals, guidebooks, and hand ...
  • Automated and Connected Vehicle AVCV Test Bed To Improve Transit Bicycle and Pedestrian Safety Phase III Technical Report
    Automated and Connected Vehicle (AV/CV) Test Bed To Improve Transit, Bicycle, and Pedestrian Safety Phase III: Technical Report
    Turnbull, Katherine F. ;
    Sunkari, Srinivasa
    2022-07-01 | PDF
    Crashes involving transit vehicles, bicyclists, and pedestrians are a concern in Texas, especially in urban areas. This research explored the potential of automated and connected vehicle (AV/CV) technology to reduce or eliminate these crashes. The project objectives focused on identifying safety concerns related to the interaction of transit vehicl ...
  • Lateral Analysis Guidelines for Drilled Shafts in Nevada Based on LRFD Framework
    Lateral Analysis Guidelines for Drilled Shafts in Nevada Based on LRFD Framework
    Motamed, Ramin ;
    Siddharthan, Raj V.
    2022-07-01 | PDF
    The major goal of this research is to improve the conventional p-y analysis in the context of larger diameter drilled shafts. The conservative lateral response due to the absence of lateral resistance components in p-y analysis for larger diameter shafts has been termed as ‘diameter effect’ in past research. To apply and evaluate the proposed unifi ...
  • Electrification Plan for State of Utah Airport Infrastructure
    Electrification Plan for State of Utah Airport Infrastructure
    Christensen, Carsten ;
    Christensen, David
    2022-07-01 | PDF
    A framework is described to aid government and private entities in exploring the impacts of electrified aviation technology on the aviation ecosystem and to plan grid and charging infrastructure development at airports in preparation to support electrified aviation. Exploratory analyses are conducted to forecast the deployment and adoption of elect ...
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