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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 2741 - 2760 of 35959 results
  • Autonomous Truck Mounted Attenuator ATMA Incident Response CSU Data Report
    Autonomous Truck Mounted Attenuator (ATMA) Incident Response - CSU Data Report
    Daily, Jeremy ;
    Span, Martin
    2022-05-01 | PDF
    As a specific Connected and Automated Vehicle (CAV) technology, the Autonomous Truck Mounted Attenuator (ATMA) is being developed by hardware and software vendors to help save the lives of Department of Transportation (DOT) workers in active highway work zones. The ATMA utilizes an innovative Leader/Follower technology that allows manned and unmann ...
  • Evaluating the Connection Between Transit and TNCs Transportation Network Companies in Pinellas County for Statewide Application Summary
    Evaluating the Connection Between Transit and TNCs (Transportation Network Companies) in Pinellas County for Statewide Application [Summary]
    Florida. Department of Transportation
    2022-05-01 | PDF
    University of Florida researchers studied partnerships between PSTA and TNCs to enhance understanding of project development and how cost-effectiveness can be maintained.
  • Development of Standard Methodology to Measure Sulfate Ions in PostTensioned Grouts Summary
    Development of Standard Methodology to Measure Sulfate Ions in Post-Tensioned Grouts [Summary]
    Lau, Kingsley
    2022-05-01 | PDF
    Florida International University researchers identified mechanisms by which sulfate ions move through grout and identified the effects of grout sampling methodologies for deficient grouts.
  • Toward a Florida Automated Connected Electric and Shared ACES Transportation System Roadmap Phase I Summary
    Toward a Florida Automated, Connected, Electric and Shared (ACES) Transportation System Roadmap: Phase I [Summary]
    Lin, Pei-Sung
    2022-05-01 | PDF
    The research objective was to develop and demonstrate tools that can serve as the foundation of coordinated ACES activities in Florida. The researchers also conducted outreach events with stakeholders to introduce and encourage use of the tools.
  • Design of Educational Material and Public Awareness Campaigns for Improving Work Zone Driver Safety
    Design of Educational Material and Public Awareness Campaigns for Improving Work Zone Driver Safety
    Chahine, Ricardo ;
    Adu Gyamfi, Prince
    2022-05-01 | PDF
    This project aims to help improve work zone driver safety in Indiana through driver education and public awareness campaigns. The project focused on two specific objectives: (1) to design a public awareness campaign to increase drivers’ knowledge and influence positive attitudes about work zone driver safety practices; and (2) to prepare educationa ...
  • Develop Surface Aggregate Classification of Reclaimed Asphalt Pavement Project Summary
    Develop Surface Aggregate Classification of Reclaimed Asphalt Pavement [Project Summary]
    Hu, Sheng ;
    Zhou, Fujie
    2022-04-30 | PDF
    The aggregate blended DFT value provides a good indication of the skid resistance of the corresponding mixture or pavement surface. A higher aggregate blended DFT implies a higher skid resistance for a given gradation or mixture type. According to the findings, the recommendations are as follows: • The measured RAP aggregate DFT was suggested to be ...
  • Considerations for Super 3 CrossSection in HighVolume Rural Corridors with Turning Traffic Project Summary
    Considerations for Super 3 Cross-Section in High-Volume Rural Corridors with Turning Traffic [Project Summary]
    Fitzpatrick, Kay ;
    Brewer, Marcus A.
    2022-04-30 | PDF
    In addition to a review of the relevant literature, the researchers conducted field studies to observe and record traffic activities at intersections on rural two-lane highways with passing lanes or turn lanes. The field studies produced speed data and video recordings of turning maneuvers to analyze for key findings. Those findings were then used ...
  • Addressing Bicyclist Safety Through the Development of Crash Modification Factors for Bikeways Project Summary
    Addressing Bicyclist Safety Through the Development of Crash Modification Factors for Bikeways [Project Summary]
    Dadashova, Bahar ;
    Dixon, Karen
    2022-04-30 | PDF
    The findings of this project indicate that installation of bikeway facilities can significantly improve safety for bicyclists. Implementing conventional bicycle lanes can help reduce total, fatal and injury, and property-damage-only crashes by 41–49 percent. Buffered bicycle lanes can improve safety by 20–65 percent, and separated bicycle lanes can ...
  • Extreme Flood Vulnerability Analysis
    Extreme Flood Vulnerability Analysis
    Dorney, Chris ;
    Amos, Josh
    2022-04-30 | PDF
    This project will build on the pilot to integrate key climate change vulnerability metrics from the 2014 study into decision-making at the agency using such tools as BRIM and TAMS: implement the Statewide Multimodal Transportation Plan's System Stewardship strategies and related work plan items to identify vulnerabilities and assess risks to the tr ...
  • Evaluating Fall Monarch Butterfly Roadkill Hotspot Incidence and Potential Roadkill Mitigation
    Evaluating Fall Monarch Butterfly Roadkill Hotspot Incidence and Potential Roadkill Mitigation
    Tracy, James ;
    Birt, Andrew
    2022-04-22 | PDF
    Five continuous years of MaxEnt model projections for fall monarch roadkill in the Texas Central Funnel from 2016 to 2020 agree with simple extrapolations in revealing a biennial cycle of higher roadkill in the even-numbered years of 2016, 2018, and 2020, representing about 2.5% of the monarch overwintering population. In contrast, roadkill represe ...
  • Determining Bearing Resistance of Cantilever Sheet Piles
    Determining Bearing Resistance of Cantilever Sheet Piles
    Song, Xiaoyu ;
    Taghavi, Amirata
    2022-04-19 | PDF
    Sheet pile walls are structures that FDOT has only used for permanent and temporary lateral support. The Department has not allowed these elements to be used as vertical load bearing elements because of the inability to confirm bearing resistance during construction. Current FDOT practice requires discrete deep foundation (piles or drilled shafts) ...
  • Effect of Seat Belt Use on Injury Severity for Adult RearSeat Occupants Injured in Motor Vehicle Crashes
    Effect of Seat Belt Use on Injury Severity for Adult Rear-Seat Occupants Injured in Motor Vehicle Crashes
    Reyes, Michelle L.
    ORCID ICON IMG
    2022-04-07 | PDF
    In the State of Iowa passengers age 18 and older are not required by law to use seat belts when they ride in the back seat of a motor vehicle. Only 23.1% of adult rear-seat passengers involved in fatal crashes in Iowa from 2013-2019 were belted compared to 70.5% of adult front-seat passengers. This project aimed to estimate and compare the costs of ...
  • Galena Creek Bridge Health Monitoring Instrumentation
    Galena Creek Bridge Health Monitoring Instrumentation
    Park, Jee Woong ;
    Sherman, Ryan J.
    2022-04-02 | PDF
    This abstract documents and presents a research study/implementation project of structural health monitoring (SHM) systems on the Galana Creek Bridge, supported by the Nevada Department of Transportation under Project Agreement No: P743-18-803. Full-scale SHM systems, in combination with smart monitoring software, were designed and implemented on t ...
  • Developing Safety Performance Function SPF and Crash Modification Factor CMF for Managed Lanes Separation Treatments
    Developing Safety Performance Function (SPF) and Crash Modification Factor (CMF) for Managed Lanes Separation Treatments
    Alluri, Priyanka ;
    Geedipally, Srinivas
    2022-04-01 | PDF
    The goal of this project was to quantify the effects of managed lanes separation type on the safety performance of freeway facilities with managed lanes. The primary objective of the project was to develop quantitative measures that will be useful in comparing separation treatment alternatives for managed lanes. Following a comprehensive review of ...
  • Evaluation of Sediment Basin Performance Using Large Scale Testing Techniques
    Evaluation of Sediment Basin Performance Using Large Scale Testing Techniques
    Schussler, Jaime ;
    Perez, Michael A
    2022-04-01 | PDF
    The Iowa DOT is required to develop stormwater pollution prevention plans (SWPPPs) to minimize the risk of downstream pollution emanating from highway construction, as specified in the National Pollutant Discharge Elimination System General Permit No. 2 (NPDES Permit). The Iowa DOT commonly employs temporary sediment control basins to detain sedime ...
  • Evaluation and Enhancement of the Florida Statewide Model Summary
    Evaluation and Enhancement of the Florida Statewide Model [Summary]
    Majano, Vladimir ;
    Jin, Xia
    2022-04-01 | PDF
    Florida International University researchers reviewed the Florida Statewide Model as well as trends in travel demand modeling to develop a roadmap for short-term, medium-term, and long-term improvements to FLSWM. Project Activities The researchers reviewed the applicable literature to identify planning applications and issues in statewide travel de ...
  • Epoxy Dowel Pile Splice Evaluation
    Epoxy Dowel Pile Splice Evaluation
    Mehrabi, Armin ;
    Farhangdoust, Saman
    2022-04-01 | PDF
    For various reasons, including limitations in shipping and operation, as well as unforeseen soil conditions, it often happens that splicing of precast prestressed concrete pile (PPCP) segments has to be performed at the site to achieve longer lengths. Epoxy-bonded dowel splices are commonly used in Florida. The objective of this study was to invest ...
  • Evaluation of Manual Infrared Brake Screening Technologies
    Evaluation of Manual Infrared Brake Screening Technologies
    Crabtree, Joseph D. ;
    Beaven, Brian
    2022-04-01 | PDF
    The purpose of this project was to install and operate two manual infrared (IR) brake screening systems at Kentucky inspection facilities to enhance the quality of Level 1 safety inspections. A radio button in the inspection software allowed enforcement personnel to indicate when the IR equipment was used to select a truck for inspection. This feat ...
  • The Tipping Point What COVID19 Travel Reduction Tells Us About Effective Congestion Relief
    The Tipping Point: What COVID-19 Travel Reduction Tells Us About Effective Congestion Relief
    Morris, Paul ;
    Parikh, Gordon
    2022-04-01 | PDF
    The Tipping Point – What COVID-19 Travel Reduction Tells Us About Effective Congestion Relief uses observed data collected before and during the COVID-19 pandemic in the Twin Cities metropolitan area to answer a question with important implications for highway investment planning and travel demand management: At what level of vehicle miles traveled ...
  • Correlation of Slag Cement Composition with Durability of Portland CementSlag Concrete Summary
    Correlation of Slag Cement Composition with Durability of Portland Cement-Slag Concrete [Summary]
    Armenteros, Jose ;
    Zayed, Abla
    2022-04-01 | PDF
    Field observations of some concrete structures have raised concerns about Florida Department of Transportation (FDOT) specifications for slag in cement mixes. In this project, researchers addressed the effect of slag composition on temperature rise of setting concrete that can lead to cracking and sulfate content that can reduce durability. To inve ...
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