Search results for [United States.Federal Highway Administration.Office of Advanced Research.] at NC Cardinal

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Opportunities for advanced vehicle control systems in commercial vehicle operations and public transportation systems / by Hopkins, Jennifer,1969-; Larsen, Robert.(CARDINAL)763644; United States.Federal Highway Administration.(CARDINAL)139839; E-Systems Inc.(CARDINAL)315523; Turner-Fairbank Highway Research Center.(CARDINAL)286897;

Includes bibliographical references (pages 33-34).Final report;Sponsored by Office of Traffic Operations and Safety R&D, Federal Highway Administration, under contract no.

Subjects: Technical reports.; Buses; Express highways; Trucks;

Available copies: 1 / Total copies: 1

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Advances in weigh-in-motion using pattern recognition and prediction of fatigue life of highway bridges. by Gagarine, Nicolas.; Albrecht, Pedro.(CARDINAL)328724; United States.Federal Highway Administration.Office of Engineering & Highway Operations Research and Development,sponsor.(CARDINAL)286896; Turner-Fairbank Highway Research Center.(CARDINAL)286897; University of Maryland, College Park.Department of Civil Engineering.(CARDINAL)328723;

Includes bibliographical references (pages 37-40).Introduction -- Background on development of WIM+R system -- Field experiments -- Weigh-in-motion study -- Structural response study -- Pattern recognition study -- Conclusions and recommendations -- Appendices -- References.Final report;The two main objectives of the present study were to: (1) demonstrate the advantages of using the Weigh-in-Motion and Response (WIM+R) system to evaluate the fatigue life of existing bridges and (2) introduce pattern recognition methods in the analysis of WIM+R data. Four steel girder bridges were instrumented to obtain strain data at fatigue critical details, and at sections of maximum strain to compute the gross vehicle weight (GVW) of each truck. Two were simple spans, and two continuous spans. A comparative study of three of the four alternatives suggested by AASHTO showed that the fatigue life computed with direct measurements of the stress ranges were greater than those computed with the simplified approaches. The effect of secondary cycles was negligible for the four bridges. The damage equivalent secondary cycle factor for fatigue was defined. The applicability of three pattern recognition methods for WIM+R was investigated. The dynamic time warping, hidden Markov model, and feed forward neural network methods can classify trucks with the measured strain patterns alone.Sponsored by the Office of Engineering & Highway Operations R & D, and prepared by the Dept. of Civil Engineering, University of Maryland, under contract no.

Subjects: Technical reports.; Bridges; Girders; Iron and steel bridges; Pattern recognition systems.; Steel, Structural;

Available copies: 1 / Total copies: 1

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Comparable systems analysis : design and operation of advanced control centers / by Kelly, Michael J.,Ph. D.(CARDINAL)313222; Gerth, Jeffrey M.; Whaley, Christopher J.; United States.Federal Highway Administration.Offices of Research and Development.(CARDINAL)284766; Georgia Institute of Technology.Electronic Systems Laboratory.; Turner-Fairbank Highway Research Center.(CARDINAL)286897;

Includes bibliographical references (page 71).Background and summary -- The comparable systems analysis methodology -- System overviews for site visits -- State-of-the-art of IVHS TMC technologies -- User-centered automation -- System evolution -- User system interfaces and workstations -- Staffing, selection, and training -- Procedures, documentation, and job aids -- Other design and privacy issues -- Design considerations based on comparable systems analysis -- References.Task report;This research explored lessons that have been learned involving human factors in the design and operation of control centers that were similar to a generic, intelligent vehicle highway system (IVHS) class traffic management center (TMC). This report summarizes the critical input, data processing, and output functions that are expected to be performed by IVHS-class TMCs. It describes how these functions are currently performed by the sample of existing high-technology centers and how the functions might evolve with near-term technology advancements and automation. It addresses a series of important TMC design considerations including the user-centered design process, operator selection and training, system evolution and advanced automation, user interface design, and job performance aids.Performed by Georgia Institute of Technology, Electronic Systems Laboratory, under contract no.

Subjects: Technical reports.; Electronic traffic controls.; Highway communications.; Human engineering.; Intelligent transportation systems.; System design.;

Available copies: 1 / Total copies: 1

On-line resources: http://www.fhwa.dot.gov/publications/research/safety/94147/94147.pdf;

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Metropolitan America in transition : implications for land use and transportation planning / by United States.Federal Highway Administration.(CARDINAL)139839;

Session 1. Current Trends in Metropolitan Development -- Session 2. Economic, Social, and Environmental Dimension of Urban Development -- Session 3. Perspectives on Future Urban Development -- Session 4. Planning Perspectives.This report summarizes a workshop held in Arlington, Virginia, on September 9-10, 1993, focusing on the broad range of factors that influence metropolitan development patterns in the United States and the impacts of those development patterns. Jointly sponsored by the Federal Highway Administration (FHWA), the Federal Transit Administration (FTA), the Office of the Secretary (OST) of the U.S. Department of Transportation (DOT), and the Lincoln Institute of Land Policy, this workshop examined fundamental issues related to past, present, and future patterns of metropolitan development and how public policy can be formulated in full consideration of these issues. The program was built upon a one-day seminar sponsored by FHWA in August 1992 entitled "Edge City and ISTEA--So What?" at which emergence and character of large-scale, mixed-use suburban centers were discussed. The workshop had a dual focus: a) to identify the range and scope of policy issues associated with coordinated land use and transportation planning; and b) to prepare an agenda of research and program activities to advance the state of knowledge on the topic. Workshop themes included identifying emerging growth trends and assessing their impact on mobility and various other social, economic, and environmental quality-of-life aspects in metropolitan America. The workshop program consisted of four plenary sessions comprised of paper presentations followed by individual and panel discussions. Two rounds of small-group breakout sessions were conducted to further develop the issues and possible solutions. Plenary session topics included: Regional demographic and land use trends; Economic, social, and environmental dimensions of growth; Diversity of perspectives on future development patterns; and Policy development and analysis processes to support planning. By the end of the workshop, the discussions converged on a short list of key themes warranting further attention and providing the basis for recommended future research and program activities.

Subjects: Conference papers and proceedings.; Cities and towns; Land use; Urban transportation; Metropolitan areas; Urban policy; Transportation;

Available copies: 1 / Total copies: 1

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Issues impacting bridge painting : an overview / by Bernecki, Thomas F.(CARDINAL)319141; United States.Federal Highway Administration.(CARDINAL)139839; Northwestern University (Evanston, Ill.).Basic Industrial Research Laboratory.(CARDINAL)319140;

Includes bibliographical references (page 161).Introduction -- Task A: Economic evaluation -- Task B: Worker protection/paint removal -- Task C: Evaluation of procedures for analysis and disposal of lead-based paint-removal debris -- Task D: Advanced coatings -- Task E: Accelerated testing -- Task F: Productivity improvement -- Appendix A: Description of electrochemical techniques -- References.Final report;This final report documents the findings of a research program designed to collect and critically assess information on issues impacting bridge painting. Life-cycle costs and performance were used to assess the economics of maintenance painting. These assessments are made difficult (uncertain) because performance data and hidden application costs are extremely variable. The variability of coating performance can be improved by better control of preparation quality. Paint-removal assessments were made based largely on field operations. A few tests involving environmental chambers were conducted. Test conditions and pros and cons of the various procedures are critically summarized. Regarding worker safety, recommendations are made for close monitoring and control of the particles generated during surface preparation, especially when techniques such as steel-grit blasting and laser ablation are used for cleaning. Paint debris digestion procedures followed by atomic absorption spectroscopy is the best way to determine total lead in a paint film. The toxicity characteristic leaching procedure (TCLP) is currently the best method for classifying paint, but may not be a reliable indicator of future resistance to leaching. Steel blast media is recyclable and stabilizes lead; proprietary additives work well in reducing leachable lead in the TCLP. Long-term stability of lead-containing debris has not been validated. With the exception of thermal spray coatings, the lack of performance data, i.e., long-term durability data, is a major problem in using advanced coating systems. Advantages and disadvantages of thermal spray coatings are summarized. Modified accelerated testing procedures to determine coating durability were identified that could improve the correlation between laboratory tests and corresponding field tests. Several sensor technologies were considered in an effort to identify techniques that could improve the quality of applied coatings. The methods evaluated included monochrome CCD (to determine the degree of surface rusting), color CCD to assess the cleanliness of blast-cleaned surfaces, and thermal-wave images to evaluate the condition of the substrate beneath the coating prior to paint removal.Sponsored by Office of Engineering Research and Development, Federal Highway Administration, under contract no.

Subjects: Technical reports.; Bridges; Bridges; Paint removers; Paint;

Available copies: 1 / Total copies: 1

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