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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 5221 - 5240 of 36022 results
  • Technology Evaluation for the Technology Utilization Plan
    Technology Evaluation for the Technology Utilization Plan
    Gold, Andrea ;
    Werner, Mark
    2019-11-01 | PDF
    The Texas Technology Task Force is an external advisory board to the Texas Department of Transportation (TxDOT) that conducts technology discovery activities and delivers recommendations for advancing technology to prepare the future Texas transportation system. The Task Force is developing a Technology Utilization Plan that will serve as the fulcr ...
  • Validating Change of Sign and Pavement Conditions and Evaluating Sign Retroreflectivity Condition Assessment on Georgias Interstate Highways Using 3D Sensing Technology
    Validating Change of Sign and Pavement Conditions and Evaluating Sign Retroreflectivity Condition Assessment on Georgia’s Interstate Highways Using 3D Sensing Technology
    Tsai, Yichang (James) ;
    Wang, Zhaohua
    2019-11-01 | PDF
    Traffic signs are important for roadway safety and provide critical guidance to road users with traffic regulations, road hazard warnings, destination information, and other geographic information. Pavement surface distress data is critical for monitoring the statewide pavement conditions, identifying maintenance activities, and optimally allocatin ...
  • Stochastic MultiObjective OptimizationBased Life Cycle Cost Analysis for New Construction Materials and Technologies
    Stochastic Multi-Objective Optimization-Based Life Cycle Cost Analysis for New Construction Materials and Technologies
    Gao, Jingqin ;
    Ozbay, Kaan
    2019-11-01 | PDF
    The sustainability of transportation infrastructure depends on the adoption of new construction materials and technologies that can potentially improve performance and productivity. However, most agencies would like to evaluate these new materials and technologies at both the project and network levels before replacing the traditional ones. It also ...
  • Partial Automation for Truck Platooning
    Partial Automation for Truck Platooning
    Shladover, Steven E. ;
    Lu, Xiao-Yun
    2019-11-01 | PDF
    Researchers at California Partners for Advanced Transportation Technology (PATH), a research and development program at the University of California-Berkeley, studied the potential benefits of cooperative adaptive cruise control (CACC) by deploying the technology in a platoon of three trucks. They built the CACC system and implemented it in three l ...
  • Integrated Implementation of Innovative Intersection Designs
    Integrated Implementation of Innovative Intersection Designs
    Rouphail, Nagui M. ;
    Cunningham, Christopher M.
    2019-11-01 | PDF
    This study evaluated the performance of pedestrian-bicycle crossing alternatives at Continuous Flow Intersections (CFI). Further, a comparison was also performed of CFI crossing types against a standard intersection designed to provide an equivalent volume-to-capacity ratio. Three CFI crossing alternatives were tested, namely Traditional, Offset, a ...
  • Infrastructure and Policy Needs for Personal Electric Mobility Devices in a Connected Vehicle World
    Infrastructure and Policy Needs for Personal Electric Mobility Devices in a Connected Vehicle World
    Mwakalonge, Judith L ;
    Mamun, Md Mahmud Hasan
    2019-11-01 | PDF
    The Personal Electric Mobility Device (PEMD) is becoming a popular, accessible mode of transportation among the people who used to walk, bike, and drive cars. Although PEMDs have plenty of features, their safety and operational features while running on a walkway or roadway are less known. As these devices are too fast for a footpath and too slow f ...
  • Megaregional Transportation System Resilience Planning
    Megaregional Transportation System Resilience Planning
    Urbanowicz-Pollock, Paulina ;
    Loftus-Otway, Lisa
    2019-11-01 | PDF
    The contents of this report contribute to the foundational research for megaregional transportation resilience planning. Megaregions contain the majority of America’s population and economic centers, and experience various levels of devastating impacts as a result of gradual climate change impacts and natural disaster threats. This work defines tra ...
  • Compilation of Local Studies and Regional Calibration of Pavement ME Design for Rigid and Flexible Pavements in Oklahoma
    Compilation of Local Studies and Regional Calibration of Pavement ME Design for Rigid and Flexible Pavements in Oklahoma
    Sakhaeifar, Maryam ;
    Tabesh, Mahmood
    2019-11-01 | PDF
    The AASHTOWare Pavement ME Design software was developed as an advanced pavement design tool based on the mechanistic-empirical pavement design guide (MEPDG). The existing performance prediction models utilized in this design guide are nationally calibrated, and it is essential to calibrate these models based on the specific regional materials and ...
  • Strategies to Mitigate Wrongway Driving Incidents on Arterials
    Strategies to Mitigate Wrong-way Driving Incidents on Arterials
    Alluri, Priyanka ;
    Wu, Wanyang
    2019-11-01 | PDF
    The goal of this research effort was to identify strategies to mitigate wrong-way driving (WWD) incidents on arterials in Florida by developing a scenario-based WWD crash mitigation approach to address two specific needs: which arterial corridors are prone to WWD incidents and which WWD incident category needs addressing on these corridors. The WWD ...
  • Division of Engineering Research on Call Task 3 Investigation on Pavement Friction Demand Categories and Highway ConditionBased Friction Demand SN Threshold
    Division of Engineering Research on Call Task #3 - Investigation on Pavement Friction Demand Categories and Highway Condition-Based Friction Demand SN Threshold
    Wang, Hui ;
    Liang, Robert
    2019-11-01 | PDF
    Though faced with continuously increasing maintenance due to aging infrastructure and limited funding, Ohio Department of Transportation is striving to maintain and improve the efficiency and safety of the state highway system. One of the major tasks is reducing highway crashes. Skid resistance is currently the road surface characteristic that has ...
  • Evaluation of Light Emitting Surface and Light Emitting Diode Roadway Luminaires
    Evaluation of Light Emitting Surface and Light Emitting Diode Roadway Luminaires
    Bullough, John D ;
    Skinner, Nicholas P
    2019-11-01 | PDF
    In the present study, roadway luminaires using light emitting surface (LES) technology were compared in terms of photometric performance to roadway luminaires using high pressure sodium (HPS) lamps and light emitting diode (LED) sources. Measurements of light output and electrical power use revealed that the LES luminaires performed similar to the ...
  • NetworkLevel Scheduling of Road Projects During the Construction Season Considering Network Connectivity
    Network-Level Scheduling of Road Projects During the Construction Season Considering Network Connectivity
    Woldemariam, Wubeshet B ;
    Agyemang, Augustine
    2019-11-01 | PDF
    INDOT implements several hundred highway projects annually. One of the unintended (and adverse) consequences of road work is the establishment of work zones or full or partial closure of certain road links and the subsequent impairment of network connectivity during the construction season. The temporary reduction in network connectivity can lead t ...
  • Synthesis of Safety Applications in Winter Weather Operations
    Synthesis of Safety Applications in Winter Weather Operations
    Shahandashti, Mohsen ;
    Mattingly, Stephen P.
    2019-11-01 | PDF
    Despite every precaution taken by the TxDOT maintenance operators, winter operations vehicles have been hit in the rear, causing injury to the operators as well as the travelling public. The objectives of this synthesis research project were to synthesize and critically evaluate existing methods and devices used by various TxDOT districts for enhan ...
  • Evaluation of Performance and LifeCycle Cost of Asphalt 818 Specifications Research Project Capsule
    Evaluation of Performance and Life-Cycle Cost of Asphalt (8/18 Specifications) [Research Project Capsule]
    Mayeux, Corey R ;
    Rupnow, Tyson
    2019-11-01 | PDF
    The Louisiana Department of Transportation and Development (DOTD) has constructed many of its roadways with hot mix asphalt, relying on control of volumetric properties to ensure pavement performance. Due to increased traffic, along with sole reliance on volumetric properties for quality, more frequent premature failures have occurred on these road ...
  • T15 Base One Soil Stabilization
    T15 Base One Soil Stabilization
    Abernathy, Craig
    2019-11-01 | PDF
    The project is located on Montana Route 117 (P-17) in Valley County from the north end of the Milk River bridge extending north approximately 1.91 miles to the new alignment and intersection of MT 117 and (NHS/NI) US2. Test sections will also include the old stretch of MT 117 through the town of Nashua (Front and Sargent STS). The pavement sections ...
  • Phase II Evaluation of Metakaolin for GDOT Concrete Specifications ASTM C618 N Pozzolan and Mass Concrete Provision
    Phase – II Evaluation of Metakaolin for GDOT Concrete Specifications (ASTM C618 N Pozzolan) and Mass Concrete Provision
    Geum Chorzepa, Mi ;
    Durham, Stephan A.
    2019-11-01 | PDF
    This report includes both experimental and analytical investigations of concrete mixtures containing supplementary cementitious materials to identify sustainable alternatives to Class F fly ash for use in Georgia’s mass concrete structures. The primary goal of this study is to identify concrete mixtures that reduce the potential for thermal crackin ...
  • Performance Engineered Pavements techbrief
    Performance Engineered Pavements [techbrief]
    United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure
    2019-11-01 | PDF
    This Technical Brief provides an overview of the several initiatives that encompass the concept of Performance Engineered Pavements (PEP). This document serves as the first in a series of PEP technical briefs on designing and accepting our nation's pavements for performance. Future technical briefs will focus on Asphalt Performance Testing (APT), C ...
  • MultiModal Modelling BIM Template for Hub Connectivity and Networks
    Multi-Modal Modelling: BIM Template for Hub Connectivity and Networks
    Briscoe, Danelle
    ORCID ICON IMG
    2019-11-01 | PDF
    A multimodal, transportation-oriented approach to a Building Information Model (BIM) template advances the application of this technology to a new typology. Furthermore, the directive of the template explores equity diverse populations and communities through the development of user based BIM component assemblies ranging from air travel 3D model ob ...
  • NonOptimal Usage and Perception of a Protected Intersection for Bicycling and Walking Salt Lake City UT
    Non-Optimal Usage and Perception of a Protected Intersection for Bicycling and Walking, Salt Lake City, UT
    Lyons, Torrey ;
    Choi, Dong-ah
    2019-11-01 | PDF
    This paper examines a before-and-after case study of a protected intersection in Salt Lake City, Utah. The intersection was completed in late 2015 and represents one of the first examples of a protected intersection in North America. This research aims to determine the impact of new intersection configurations on separated bike lanes in regard to p ...
  • Development of the Road Construction Database ReCORD System
    Development of the Road Construction Database (ReCORD) System
    Durham, Stephan A. ;
    Johnsen, Kyle
    2019-11-01 | PDF
    Documentation of past experiences through the use of a Lessons Learned Program (LLP) is instrumental to an organization’s ability to improve by avoiding past mistakes while adapting to new solutions and methods. Feedback from project stakeholders through interviews and meetings, as well as a national survey of state department of transportation pro ...
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