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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 3201 - 3220 of 36873 results
  • 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 ...
  • ReUse of Regional Waste in Sustainably Designed Soils
    Re-Use of Regional Waste in Sustainably Designed Soils
    Saftner, David ;
    Cai, Meijun
    2022-04-01 | PDF
    This project explores the potential re-use of waste materials/by-products as a soil amendment in northeastern Minnesota. The project team identified 23 waste/by-products and collected 15 of but only analyzed 11 because of the possible content of persistent chemicals in some of the materials or the unwillingness of the owner to participate. Peat scr ...
  • Development of an Apple App for GDOT AASHTOWare Project
    Development of an Apple App for GDOT AASHTOWare Project
    Hu, Qinang ;
    Scantling, Carson
    2022-04-01 | PDF
    GDOT AASHTOWare is currently used to gather information about the sample data, which includes all the details of the samples, such as the basic sample data, contract information, testing status, and results. GDOT wants a mobile app that allows the user to create a new sample, enter the basic sample information on the mobile phone, and send this to ...
  • Development of the KDOT Lane Closure Guide for Wichita Kansas Metropolitan Area
    Development of the KDOT Lane Closure Guide for Wichita, Kansas Metropolitan Area
    Hazelton, Scott A ;
    Newmark, Gregory L
    2022-04-01 | PDF
    Each year construction events occur on interstates and highways to repair the road network. To perform these activities a work zone, or a temporary closing of a lane or shoulder, is required. However, work zones can have significant impacts on traffic flow, especially during peak travel times. To mitigate the impact of work zones, the Kansas Depart ...
  • Domestic Airline Fares Consumer Report Fourth Quarter 2021 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Fourth Quarter 2021 Passenger and Fare Information
    United States. Department of Transportation
    2022-04-01 | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • Strategies to Identify and Mitigate Secondary Crashes Using RealTime Traffic Data on Floridas Turnpike System Summary
    Strategies to Identify and Mitigate Secondary Crashes Using Real-Time Traffic Data on Florida’s Turnpike System [Summary]
    Alluri, Priyanka
    2022-04-01 | PDF
    From fender-benders to more serious incidents, crashes are the primary source of nonrecurring congestion on Florida roadways. Vehicles that stop or slow down because of a crash not only block traffic flow, they can also cause secondary crashes, further complicating the crash scene and increasing congestion. Predicting when a secondary crash might o ...
  • Evaluation of Software Platforms for Transit Service Planning for Potential Statewide Applications
    Evaluation of Software Platforms for Transit Service Planning for Potential Statewide Applications
    Gan, Albert ;
    Cevallos, Fabian
    2022-04-01 | PDF
    Transit agencies are increasingly using commercially available software platforms to assist in their service planning. These platforms vary in their applications, functionalities, and capabilities, among others. This project includes three focuses: (1) identifies and evaluates existing software platforms used by transit agencies for transit service ...
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