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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 8141 - 8160 of 36151 results
  • American Fuel Cell Bus Project Evaluation Third Report
    American Fuel Cell Bus Project Evaluation : Third Report
    Eudy, Leslie ;
    Post, Matthew
    2017-05-01 | PDF
    This report presents results of the American Fuel Cell Bus (AFCB) Project, a demonstration of fuel cell electric buses (FCEB) operating in the Coachella Valley area of California. The AFCB, built on an ElDorado National-California 40-foot Axess bus platform, has a fuel-cell-dominant hybrid electric propulsion system in a series configuration. BAE S ...
  • Electric Vehicle Battery Durability and Reliability Under Electric Utility Grid Operations
    Electric Vehicle Battery Durability and Reliability Under Electric Utility Grid Operations
    Dubarry, Matthieu
    2017-05-01 | PDF
    Battery degradation is extremely important to EV technologies and is a function of several factors, such as electrode chemistries, operating temperatures, and usage profiles (i.e. vehicle only vs. vehicle-to-grid (V2G) applications). The goal of this research was to assess such impact. Laboratory testing of commercial "18650" Li-ion cells was condu ...
  • RAS
    (RAS).
    Diefenderfer, Stacey D.
    2017-05-01 | PDF
    In recent years, there has been increased interest in the use of reclaimed material in asphaltmixtures. The use of recycled asphalt shingles (RAS) has been of interest because of the high asphaltcontent, although this asphalt is considerably stiffer than that typically used in paving mixtures. TheVirginia Department of Transportation has specificat ...
  • Evaluation of static resistance of deep foundations
    Evaluation of static resistance of deep foundations.
    McVay, Michael ;
    Chung, Jae
    2017-05-01 | PDF
    The focus of this research was to evaluate and improve Florida Department of Transportation (FDOT) FB-Deep software prediction of nominal resistance of H-piles, prestressed concrete piles in limestone, large diameter (> 36”) open steel and concrete piles, as well as estimation of unit side friction on permanent steel casing for drilled shafts in Fl ...
  • King County Metro Battery Electric Bus DemonstrationPreliminary Project Results
    King County Metro Battery Electric Bus Demonstration—Preliminary Project Results
    National Renewable Energy Laboratory (U.S.)
    2017-05-01 | PDF
    The U.S. Federal Transit Administration (FTA) funds a variety of research projects that support the commercialization of zero-emission bus technology. Recent programs include the National Fuel Cell Bus program, the Transit Investments for Greenhouse Gas and Energy Reduction (TIGGER) program, and the Low or No Emission Vehicle Deployment (Low-No) pr ...
  • Quantitative analysis of residential parking intrusions by passenger vehicles in New York City
    Quantitative analysis of residential parking intrusions by passenger vehicles in New York City.
    Guo, Zhan ;
    Zhou, Jianhao
    2017-05-01 | PDF
    This paper investigates the spatial patterns of residential parking intrusions in New York City, their determinants, and anestimated number and spatial patterns of induced excessive vehicle miles traveled (VMT). The paper analyzes parking ticketsdata with driver registration demographic data, and determines potential residential parking intrusions ...
  • Automated and Connected Vehicle Implications and Analysis
    Automated and Connected Vehicle Implications and Analysis
    Block, David ;
    Raustad, Richard
    2017-05-01 | PDF
    Automated and connected vehicles (ACV) and, in particular, autonomous vehicles have captured the interest of the public, industry and transportation authorities. ACVs can significantly reduce accidents, fuel consumption, pollution and the costs of congestion which in turn will offer a fundamental change to the future U.S. transportation network. Th ...
  • HighVolume Recycled Materials for Sustainable Pavement Construction
    High-Volume Recycled Materials for Sustainable Pavement Construction
    Khayat, Kamal H. ;
    Sadati, Seyedhamed
    2017-05-01 | PDF
    The main objective of this research is to evaluate the feasibility of using high-volume recycled materials for concrete production in rigid pavement. The goal was to replace 50% of the solids with recycled materials and industrial by-products. The performance of concrete mixtures made with different fine and coarse recycled concrete aggregate (RCA) ...
  • Analysis modeling and simulation AMS testbed development and evaluation to support dynamic mobility applications DMA and active transportation and demand management ATDM programs gaps challenges and future research
    Analysis, modeling, and simulation (AMS) testbed development and evaluation to support dynamic mobility applications (DMA) and active transportation and demand management (ATDM) programs — gaps, challenges and future research.
    Yelchuru, Balaji ;
    Kamalanathsharma, Raj
    2017-05-01 | PDF
    The primary objective of AMS project is to develop multiple simulation Testbeds/transportation models to evaluate the impacts of DMA connected vehicle applications and the active and dynamic transportation management (ATDM) strategies. Through this project, six virtual testbeds were developed and used for DMA and ATDM evaluation. They are (1) San M ...
  • Preliminary study to develop standard acceptance tests for pervious concrete
    Preliminary study to develop standard acceptance tests for pervious concrete.
    Rangelov, Milena ;
    Nassiri, Somayeh
    2017-05-01 | PDF
    Pervious concrete pavements are permeable pavement systems that are desired for their role in stormwatermanagement and runoff control. Increased popularity in pervious concrete pavement applications has raised the need forthe development of quality control and quality-evaluation test procedures that are suitable for pervious concretecompared to tra ...
  • Rapid Replacement of Bridge Deck Expansion Joints Phase II
    Rapid Replacement of Bridge Deck Expansion Joints – Phase II
    Jahren, Charles T. ;
    Miller, Adam M.
    2017-05-01 | PDF
    Bridge deck expansion joints are used to allow movement of the bridge deck due to thermal expansion, dynamic loading, and other factors. More recently, expansion joints have also been sealed to prevent winter de-icing chemicals and other corrosives applied to bridge decks from penetrating and damaging the bridge substructure components.
  • Strategies for effective roundabout approach speed reduction final report
    Strategies for effective roundabout approach speed reduction : final report.
    Brewer, Marcus A. ;
    Lindheimer, Tomas E.
    2017-05-01 | PDF
    Appropriate deceleration on approaches to roundabouts is primarily accomplished through the use of applicablegeometric design principles; however, traffic control devices (specifically signing and markings on the approach)also serve a vital role in communicating to the approaching driver what speed profile should be anticipated. Thisreport provides ...
  • Modeling and Analysis of Walkability in Suburban Neighborhoods in Las Vegas Report
    Modeling and Analysis of Walkability in Suburban Neighborhoods in Las Vegas [Report]
    Kaseko, Mohamed ;
    Nyagah, Peris
    2017-05-01 | PDF
    Walking has sound health benefits and can be a pleasurable experience requiring neither fuel, fare, license, nor registration. Society also benefits by the associated reduction of motorized vehicle travel. The objective of this study was to quantify the walking environment by developing a comprehensive walkability index that (1) reflects resident p ...
  • Hotspot and sampling analysis for effective maintenance and performance monitoring
    Hotspot and sampling analysis for effective maintenance and performance monitoring.
    Liu, Xiaoyue Cathy ;
    Chen, Zhuo
    2017-05-01 | PDF
    In this project, we propose two sampling methods addressing “how much and where” the agencies need to collect infrastraucture condition data for accurate Level-of-Maintenance (LOM) estimation in maintenance network with single type or multiple types of infrastructures. The method for single type infrastructure integrates Fisher information with spa ...
  • Electric vehicle energy impacts
    Electric vehicle energy impacts.
    McKenzie, Katherine
    2017-05-01 | PDF
    The objective of this research project was to evaluate the impacts of electric vehicles (EVs) andrenewable wind and solar photovoltaic (PV) power generation on reducing petroleum importsand greenhouse gas emissions to Hawaii. In 2015, the state of Hawaii mandated fossil fuelelectric power displacement by imposing Renewable Portfolio Standards (RPS) ...
  • A comparison study of oneand twodimensional hydraulic models for river environments technical summary
    A comparison study of one-and two-dimensional hydraulic models for river environments : technical summary.
    Deal, Evan C. ;
    Parr, A. David
    2017-05-01 | PDF
    Findings in this report include: differences in the flow divisions for multiple opening bridges for allthree models, less subjectivity in the construction of the 2D models than for the 1D, differences in thesensitivity of each 2D model to the Manning’s roughness coefficient, great similarity in the expansionand contraction rates at bridges for the ...
  • Develop metrics of tire debris on Texas highways project summary
    Develop metrics of tire debris on Texas highways : [project summary].
    Avelar, Raul Eduardo ;
    Pratt, Michael P.
    2017-05-01 | PDF
    This research developed metrics on the amount and characteristics of tire debris generated on Texas highways. These metrics provide numerical, data-based rates for districts to anticipate the amounts and characteristics of tire debris and to plan removal operations accordingly.The cost assessment of removal activities and safety implications provid ...
  • Design Exception InService Monitoring Program Development
    Design Exception In-Service Monitoring Program Development
    Hunter, Michael ;
    Rodgers, Michael
    2017-05-01 | PDF
    This study evaluates various possible program designs for in-service monitoring of design exceptions (DEs) for the Georgia Department of Transportation. The study recommends a multitier stepwise approach to the evaluation of DEs. Specifically, the proposed monitoring program aims to: (1) identify DE-associated hazards that have/could result in a fa ...
  • Evaluation of Desert Bighorn Sheep Overpass Effectiveness US Route 93 LongTerm Monitoring
    Evaluation of Desert Bighorn Sheep Overpass Effectiveness : U.S. Route 93 Long-Term Monitoring
    Gagnon, Jeffrey W. ;
    Loberger, Chad D.
    2017-05-01 | PDF
    During the planning stage of upgrading U.S. Route (U.S.) 93 from a two-lane highway to a four-lane divided highway, there were concerns for the local desert bighorn sheep (DBS) population. Vehicle collisions with DBS were estimated at 11 per year prior to reconstruction and would likely increase after reconstruction. To overcome collision concerns, ...
  • Performance of bridge deck overlays in Virginia phase 1 state of overlays final report
    Performance of bridge deck overlays in Virginia : phase 1 : state of overlays : final report
    Balakumaran, Soundar S.G. ;
    Weyers, Richard E.
    2017-05-01 | PDF
    Maintaining the existing transportation infrastructure is a major concern of the Virginia Department of Transportation(VDOT). The increased user travel costs, safety concerns, and financial burdens involved in replacing deteriorating decks arereasons for finding appropriate rehabilitation actions that can safely extend the service life of structure ...
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