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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 3421 - 3440 of 35958 results
  • MDOT Culvert Inspection
    MDOT Culvert Inspection
    Alexander, James ;
    Robey, Darren
    2021-07-01 | PDF
    Concrete/corrugated metal culverts (straight, 50-150 ft long, 12" -48" diameter) are currently inspected visually and less frequently with ground robots by MDOT SHA. The condition of most culverts is unclear due to inspection limitations, which impacts maintenance prioritization. An improved inspection process would allow for a more proactive appro ...
  • SelfCentering Bridge Bent for Accelerated Bridge Construction
    Self-Centering Bridge Bent for Accelerated Bridge Construction
    Pantelides, C. P. ;
    Thapa, Dipendra
    2021-07-01 | PDF
    Precast concrete construction has been proven to be very efficient in bridge engineering, especially in accelerated bridge construction (ABC), where precast concrete components are connected to save time and minimize disruption of traffic. Post-tensioned (PT) concrete structural elements when combined with energy dissipators (ED) create a hybrid sy ...
  • Modernization of Iowa Transportation Program Management System
    Modernization of Iowa Transportation Program Management System
    Waid, Danny R. ;
    Moore, Brian P
    2021-07-01 | PDF
    The TR-726 research project investigates and produces the modernization of the Iowa Transportation Program Management System, TPMS. This report describes TPMS background information, application development processes, and User Manual and Developmental Specifications used to create the web-based application modernization and incorporated improvement ...
  • Spectrum for Connected Vehicles
    Spectrum for Connected Vehicles
    Peha, Jon M ;
    Ligo, Alexandre K
    2021-07-01 | PDF
    Connected vehicles, which are likely to be an important component of smart cities, require spectrum. As of December 2019, the US Federal Communications Commission and the US Department of Transportation were pursuing opposing visions of a spectrum policy for connected vehicles. Through extensive simulation, this project will provide both agencies w ...
  • Literature Review on Use of Nanoparticle Technology for Reducing Emissions
    Literature Review on Use of Nanoparticle Technology for Reducing Emissions
    Loftus-Otway, Lisa
    ORCID ICON IMG
    2021-07-01 | PDF
    Nanoscale science, engineering, chemistry and technology—nanotechnology science—is expected to deliver societal and economic benefits in multiple fields. Transportation is expected to be one of the sectors that will see impacts from improved material life through to environmental benefits. This report provides a high-level overview and introduction ...
  • Taxiforall Incentivized Taxi Actuation System for Balanced Areawide Service
    Taxi-for-all: Incentivized Taxi Actuation System for Balanced Area-wide Service
    Joe-Wong, Carlee ;
    Noh, Haeyoung
    2021-07-01 | PDF
    This project develops a method to incentivize taxis to travel to different parts of a city so that they sense data or pick up passengers in under-served areas. Taxis' natural movement generally leads to them concentrating in busy locations with many potential passengers. By incentivizing taxis to move towards less busy locations, one can even out t ...
  • Bicycle Volume Counting Machine Validation Correction Estimating Forecasting and Analysis of Injury Risk
    Bicycle Volume: Counting Machine Validation & Correction, Estimating & Forecasting, and Analysis of Injury Risk
    Fan, Wei (David) ;
    Lin, Zijing
    2021-07-01 | PDF
    Cycling is an environmentally friendly mode of transportation that can potentially mitigate traffic congestion and improve air pollution. City planners and decision-makers have begun to incorporate the needs of cyclists when building infrastructures. However, factors like annual average daily bicycle volume (AADB) and cycling injury risk should be ...
  • SpatioTemporal Analysis of the Roadside Transportation Related Air Quality STARTRAQ and Neighborhood Characterization
    Spatio-Temporal Analysis of the Roadside Transportation Related Air Quality (STARTRAQ) and Neighborhood Characterization
    Kwon, Jaymin ;
    Ahn, Yushin
    2021-07-01 | PDF
    To promote active transportation modes (such as bike ride and walking), and to create safer communities for easier access to transit, it is essential to provide consolidated data-driven transportation information to the public. The relevant and timely information from data facilitates the improvement of decision-making processes for the establishme ...
  • Use of Flashing AmberWhite Lights on Paving Equipment in Work Zones
    Use of Flashing Amber-White Lights on Paving Equipment in Work Zones
    Hurwitz, David ;
    Gambatese, John A.
    2021-07-01 | PDF
    Safety treatments to mitigate speeding inside work zones is of perennial interest among construction partners. Prior research by ODOT and OSU captured the effect of flashing blue lights on speeding behavior. This study extended that effort to evaluate flashing amber and white lights. Three case studies were conducted on Interstates 5 and 205 during ...
  • Cognitive Attention and Its Application in Countermeasures on a Curve Section
    Cognitive Attention and Its Application in Countermeasures on a Curve Section
    Shen, Junan ;
    Gao, Weinan
    2021-07-01 | PDF
    To reduce crashes and improve traffic safety on roads, this project explored a methodology of evaluating the safety countermeasures based on cognitive attention and driving performance with eye-tracking and driving simulation technologies and comprehensive analysis of eye movements, driving performance, and short-term memory. An experiment for data ...
  • An Enhanced NetworkLevel Curve Safety Assessment and Monitoring Using Mobile Devices
    An Enhanced Network-Level Curve Safety Assessment and Monitoring Using Mobile Devices
    Tsai, Yichang (James) ;
    Yu, Pingzhou Lucas
    2021-07-01 | PDF
    A disproportionally high number of serious vehicle crashes (25% of fatal crashes) occur on horizontal curves, even though curves represent only a fraction of the roadway network (5% of highway miles) (FHWA, 2021; Atkinson et al., 2016). The in-service curve characteristics information, including curve radius, superelevation, and BBI angles, are ext ...
  • Where are Used Electric Vehicles and Who are the Buyers
    Where are Used Electric Vehicles and Who are the Buyers?
    Tal, Gil ;
    Lee, Jae Hyun
    2021-07-01 | PDF
    Very little research has been conducted on the second (and third, and thereafter) owners of new technologies. For light duty vehicles, the research has been focused on the first owners. In the case of plug-in electric vehicles (PEVs), understanding the secondary market is especially important for many reasons, including the vehicle market developme ...
  • No Ticket To Ride A Systematic Definition of Transit Insecurity
    No Ticket To Ride: A Systematic Definition of Transit Insecurity
    Nathan-Roberts, Dan ;
    Friedman-Biglin, Noah
    2021-07-01 | PDF
    The ability of persons and communities to reliably access transit is a pressing one that has not yet received significant attention in the literature on city planning, in public discourse, or in policy research. This scoping review focuses on factors that negatively impact a person or community’s ability to have reliable access to transit; we call ...
  • Guidance on Messaging to Avoid Psychological Reactance and Address Moral Disengagement
    Guidance on Messaging to Avoid Psychological Reactance and Address Moral Disengagement
    Otto, Jay ;
    Finley, Kari
    2021-07-01 | PDF
    The purpose of this project was to determine if the prevalence of psychological reactance and moral disengagement are higher among adult drivers who never or rarely wear their seat belts or who drive aggressively (i.e., speed, follow too closely, and pass excessively) and to identify potential messaging to minimize reactance and overcome moral dise ...
  • Race Class and the Production of and Exposure to Vehicular Pollution in Los Angeles
    Race, Class, and the Production of and Exposure to Vehicular Pollution in Los Angeles
    Boeing, Geoff ;
    Lu, Yougeng
    2021-07-01 | PDF
    Vehicular air pollution has created an ongoing public health crisis. Despite growing knowledge of racial injustice in exposure to vehicular particulate matter (PM2.5), less is known about the socio-demographics-mediated relationship between the production of and exposure to such pollution. This study assesses pollution burden with a unified indicat ...
  • Florida and Louisiana 2021 Peer Exchange Peer Exchange ataGlance The Effects of COVID19 on Research and Technology Transfer Process
    Florida and Louisiana 2021 Peer Exchange: Peer Exchange at-a-Glance: The Effects of COVID-19 on Research and Technology Transfer Process
    Florida. Department of Transportation  ...
    2021-07-01 | PDF
    The objectives of this peer exchange were to study the effects of COVID-19 on research delivery, technology transfer, and research operations. It was hosted by the Florida Department of Transportation (Florida DOT) and Louisiana Louisiana Department of Transportation and Development on July 20 and 21, 2021, in a virtual Zoom meeting. Guest agencies ...
  • Technology Review and Roadmap for Inventorying Complete Streets for Integration Into Pavement Asset Management Systems
    Technology Review and Roadmap for Inventorying Complete Streets for Integration Into Pavement Asset Management Systems
    Gadsby, April ;
    Tsai, Yichang (James)
    2021-07-01 | PDF
    Complete Streets provide mobility for all modes of transportation including active transportation. Complete Streets are being implemented in the US and transportation agencies must maintain these assets, which requires bringing them into asset management systems. Many gaps exist to include Complete Streets in asset management, and there is no compr ...
  • Speed Variation and Safety in Work Zones
    Speed Variation and Safety in Work Zones
    Gambatese, John A. ;
    Jin, Ziyu
    2021-07-01 | PDF
    In addition to lower speeds, the difference between vehicle speed and the average speed on the roadway has been identified as a factor in roadway crashes. For work zones, the potential for such speed variation from the average speed is magnified. The safety associated with speed variation in work zones affects both motorists driving through the wor ...
  • Division of Engineering Research on Call Agreement 34652 Task 1 Strength Reduction Method SRM Evaluation
    Division of Engineering Research on Call, Agreement #34652. Task 1, Strength Reduction Method (SRM) Evaluation
    Narsavage, Peter ;
    Pradel, Daniel
    2021-07-01 | PDF
    The Ohio Department of Transportation (ODOT) wishes to compare their current industry standard landslide stabilization analysis method using traditional Limit Equilibrium Methods (LEM) to the Strength Reduction Method (SRM) of stability analysis, by reanalyzing two landslide projects with various SRM and LEM software packages and comparing the resu ...
  • Methods To Analyze and Predict Interstate Travel Time Reliability
    Methods To Analyze and Predict Interstate Travel Time Reliability
    Zhang, Xiaoxiao ;
    Zhao, Mo
    2021-07-01 | PDF
    The Moving Ahead for Progress in the 21st Century Act (MAP-21) defined requirements for system reliability performance measures. Under MAP-21, state departments of transportation are responsible for reporting travel time reliability and for setting targets and showing progress toward those targets. In order to know how to improve travel time reliab ...
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