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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 2621 - 2640 of 36114 results
  • 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 ...
  • DataDriven Bridge Management Using Descriptive and Predictive Machine Learning Models Research Brief
    Data-Driven Bridge Management Using Descriptive and Predictive Machine Learning Models [Research Brief]
    Banaei-Kashani, Farnoush ;
    Rens, Kevin
    2022-07-01 | PDF
    Since the 1970’s, several U.S. Acts have mandated all local and state transportation agencies across the nation to perform regular inspections of the bridges (and culverts) in their jurisdiction. These have generated valuable historical databases of bridge performance data which have remained considerably underutilized.
  • Acoustic Effectiveness of Vinyl Fence Noise Walls Fact Sheet
    Acoustic Effectiveness of Vinyl Fence Noise Walls [Fact Sheet]
    Burton, Kimberly ;
    Agarwal, Ruchi
    2022-07-01 | PDF
    There are currently a variety of materials from which noise walls can be constructed, but there has been limited research on vinyl noise walls, so this project studied the acoustic, aesthetic, and cost benefits of vinyl materials to guide future noise mitigation implementation strategies. The research team studied vinyl noise walls to determine if ...
  • Characterization of Unbound Materials for MechanisticEmpirical Pavement Design for NDOT Districts 2 and 3
    Characterization of Unbound Materials for Mechanistic-Empirical Pavement Design for NDOT Districts 2 and 3
    Sebaaly, Peter E. ;
    Othman, Omar
    2022-07-01 | PDF
    The resilient modulus is a critical engineering property used to characterize the unbound and subgrade materials in the AASHTO Mechanistic Empirical Pavement Design Guide (MEPDG) where a hierarchical approach is followed. Three levels of input are specified in the AASHTOWare® Pavement ME design software. This includes direct measurement from the la ...
  • Innovation to Implementation Collaborative Forums To Boost ResearchBased Solutions to Transformational Technology and Innovation
    Innovation to Implementation: Collaborative Forums To Boost Research-Based Solutions to Transformational Technology and Innovation
    Camp, Janey ;
    Ivey, Stephanie
    2022-07-01 | PDF
    Technology is changing rapidly in this world, especially with regards to transportation. Recent advancements have potential to significantly change transportation system design, operations, and management in Tennessee and beyond. Additionally, innovation and “out of the box” thinking is contributing to improved workflows and more efficient processe ...
  • Development of Guidelines for Inspection Repair and Use of Portable Concrete BarriersVolume 2 Crash Report
    Development of Guidelines for Inspection, Repair, and Use of Portable Concrete Barriers—Volume 2: Crash Report
    Dobrovolny, Chiara Silvestri ;
    Schroeder, William J. L
    2022-07-01 | PDF
    The purpose of the tests reported herein was to assess the performance of the damaged portable concrete barrier according to the safety-performance evaluation guidelines included in the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware (MASH), Second Edition. The crash tests were performed in ac ...
  • Addressing Bicyclist Safety Through the Development of Crash Modification Factors for Bikeways
    Addressing Bicyclist Safety Through the Development of Crash Modification Factors for Bikeways
    Dadashova, Bahar ;
    Dixon, Karen
    2022-07-01 | PDF
    According to the Texas Department of Transportation Crash Record Information System database, there have been 26,148 crashes involving bicyclists (pedal cyclists) from 2010 to 2018 in Texas, resulting in 2,885 fatalities and suspected serious injuries and 22,937 non-incapacitating and possible injuries. Overall, bicycle crashes, as well as fatal an ...
  • Internal Reinforcement of Backfill Behind Integral Bridge Abutments To Mitigate Approach Slab Distresses
    Internal Reinforcement of Backfill Behind Integral Bridge Abutments To Mitigate Approach Slab Distresses
    Han, Jie ;
    Liu, Hao
    2022-07-01 | PDF
    Integral abutment bridges have become popular worldwide by eliminating movable shoes which are expensive to purchase, install, and maintain in conventional bridges. However, the behavior of bridge abutments subjected to air temperature changes for integral bridges is different from that of conventional bridges. Expansion and contraction of bridge g ...
  • Incorporation of Stated Preference and Revealed Preference Methods in Regional Travel Survey Programs Final Report
    Incorporation of Stated Preference and Revealed Preference Methods in Regional Travel Survey Programs: Final Report
    Asmussen, Katherine ;
    Dannemiller, Katherine A.
    2022-07-01 | PDF
    Transportation plans must consider the inevitable introduction of new emerging technology and must be able to assess the impacts of proposed transportation policies and large-scale infrastructure projects. To address this need, it is important to incorporate SP questions within travel surveys. This project demonstrated state-of-the-art SP technique ...
  • Mode Shift Potential Evaluations Using Desire Lines Connections to Active Functional Classification Systems
    Mode Shift Potential Evaluations Using Desire Lines & Connections to Active Functional Classification Systems
    Wasserman, David ;
    Young, Grace
    2022-07-01 | PDF
    Understanding which active transportation facilities have a high potential for mode shift is a potent metric of success for funders seeking to make high-impact transportation investments. This report documents the development and validation of a traveler alignment analysis tool that looks at the orientation and magnitude of short trips in origin-de ...
  • Shear Friction Capacity of Corrugated Pipe Connection in Precast Footings
    Shear Friction Capacity of Corrugated Pipe Connection in Precast Footings
    Vieira, Fatima ;
    Garber, David
    2022-07-01 | PDF
    Prefabricated Bridge Elements and Systems (PBES) are being more widely used, as they can significantly reduce on-site construction time impacting traffic. The main concerns when using PBES are the final assembly of the elements, type of connection between them, and tolerance to allow for field fit up. The Florida Department of Transportation (FDOT) ...
  • Nevada State Plan for Electric Vehicle Infrastructure Deployment
    Nevada State Plan for Electric Vehicle Infrastructure Deployment
    Nevada. Department of Transportation
    2022-07-01 | PDF
    The Bipartisan Infrastructure Law, formally enacted as the Infrastructure Investment and Jobs Act, dedicates $5 billion in formula funding for electric vehicle (EV) charging infrastructure, including $5.6 million for Nevada in fiscal year 2022. The Nevada Department of Transportation (NDOT) has led the development of this Nevada State Plan for Elec ...
  • Field Performance of Asphalt Pavements at Low and Intermediate Temperatures
    Field Performance of Asphalt Pavements at Low and Intermediate Temperatures
    Romero, Pedro
    2022-07-01 | PDF
    Asphalt mixtures were collected from seven field projects and distributed to different laboratories to determine their potential for cracking. Samples were prepared in the lab for testing at two conditions: low, in-service temperatures using the bending beam rheometer device based on AASHTO TP-125 and intermediate temperature using the Illinois Fle ...
  • Automating the Implementation of the Updated Grade Severity Rating System GSRS for Wyoming Mountain Passes
    Automating the Implementation of the Updated Grade Severity Rating System (GSRS) for Wyoming Mountain Passes
    Ampadu, Vincent- Michael K ;
    Haq, Muhammad Tahmidul
    2022-07-01 | PDF
    Truck crashes on steep downgrades caused by excessive brake heating is an ongoing concern for the Wyoming Department of Transportation (WYDOT). Crashes resulting from brake failure on downgrades cause a devastating toll on lives and property. To counter such crashes, WYDOT initiated a research project in 2016 to update a previous Grade Severity Rat ...
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