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Author:
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages :
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Author: Cori Vanchieri
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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"EXECUTIVE SUMMARY: At highway speeds, the major source of noise is the interaction between tires and the road surface. Noise barriers have been used by state transportation departments for many years and are the preferred solution for reducing highway traffic noise. Federal Highway Administration regulations for highway traffic and construction noise abatement are included in the Code of Federal Regulations (23 CFR772)1 and currently only consider noise barriers as an abatement measure for highway noise. However, pavement type can considerably reduce the noise generated from tire-road interaction. Yet considering pavement as a noise abatement measure is currently only allowed for pilot projects approved by the Federal Highway Administration. Through the end of 2010, 47 state departments of transportation and the Commonwealth of Puerto Rico have constructed more than 2,748 linear miles of barriers at a cost of close to 5 .5 billion (in 2010 dollars)2 . Treatment of highway pavement is generally less costly than the construction of barriers, but the noise reduction achieved by a quieter pavement is typically less than the reduction from a well-designed barrier, at least for residents in the immediate vicinity of the barrier. However, quieter pavements produce a reduction of noise at the source, which means that it may be possible to increase the number of benefited receptors (the recipient of an abatement measure that receives a noise reduction at or above the highway agency's chosen noise impact threshold value). A combination of barrier and pavement treatment may lead to cost-effective solutions to highway noise. To evaluate effectiveness of quieter pavements, a reliable measurement method for tire/road noise is needed. The method that is currently favored is measuring On-Board Sound Intensity (OBSI). OBSI data are collected in conformance with AASHTO TP-76,3 the American Association of State Highway and Transportation Officials Standard Method of Test for Measurement of Tire/Pavement Noise Using the On-Board Sound Intensity (OBSI) Method. A workshop on cost-benefit analysis of noise barriers and quieter pavements was held on January 16, 2014. One objective of the workshop was to evaluate the National Cooperative Highway Research Program Report 738, "Evaluating Pavement Strategies and Barriers for Noise Mitigation". Report 738 was prepared under Project 10-76, and is typically referred to as NCHRP 10-76.4 The report describes a methodology for the evaluation of both barriers and pavements for noise abatement, and explores how quieter pavement technology can be incorporated into Federal and state noise policy. Three key elements of the method presented in NCHRP 10-76 involve life cycle cost analysis (LCCA), the use of a research version5 of the Federal Highway Administration Traffic Noise Model (TNM), and a method for the evaluation of tire pavement noise reduction, OBSI. This report contains summaries of the presentations given during the workshop and the results of discussions identifying the challenges presented by implementing the NCHRP 10-76 methodology, especially to state departments of transportation, which carry out noise abatement projects in cooperation with the Federal Highway Administration and in conformance with the federal requirements in 23 CFR772. Using LCCA, planners can evaluate the initial cost of abatement using pavement and barriers as well as rehabilitation and maintenance costs. The methodology also incorporates a measure of the effectiveness of the resulting predicted level of traffic noise. Current regulations require impact determination and barrier design to be completed with the public-release version of TNM and average pavement. By using a research version of TNM and OBSI data to refine the tire-pavement interaction noise source, pavement effects could be included in the model (and therefore predictions could be more accurate and pavement type can be considered when assessing noise impact and abatement). Several examples illustrated that the NCHRP 10-76 approach can be successfully applied to real highway project studies. In some situations, a barrier-and-pavement hybrid solution can be more acoustically effective and/or cost effective than a barrier only solution and can allow for additional benefited receptors where a barrier only solution would not be feasible and/or reasonable. Both current regulations and the public- release version of TNM require modification if the noise reduction benefits of pavements are to be realized in construction projects. The noise reduction achieved by sound propagation over sound-absorptive pavement could also be included in the public-release version of TNM. An important part of the workshop, which was attended by noise barrier and pavement experts, as well as representatives from the FHWA and state departments of transportation, was to discuss the challenges of implementing NCHRP 10-76 methodology to state departments of transportation and to develop findings and recommendations based on these discussions. The key elements of these discussions are presented in Chapter 3 of this report. The following recommendations appear in Chapter 4 of this report: Develop and document a noise evaluation process that accounts for both noise barriers and quieter pavements. Provide funding and implement the method presented to evaluate the abatement options on a pilot program basis to help evaluate and improve the process. Upgrade the public release version of TNM to include the OBSI-related pavement assessment capabilities currently available in the research version of TNM. Organize and make publically available national databases for OBSI and LCCA. Expand TNM and highway noise abatement training to include consideration of quieter pavements and enable use of the research version of TNM. Encourage FHWA to develop guidance on the use of quieter pavements and barriers for noise abatement. Incorporate noise performance into a new performance management system. Develop and provide a noise abatement training program for pavement engineering staff. Other presentations from the workshop with important background information relevant to cost benefit analysis, noise barriers, and quieter pavements are summarized in Appendix A. The workshop agenda, the names of the participants, definitions of terms and a list of acronyms are provided in Appendix B, Appendix C, and Appendix D."
Author: Paul R. Donavan
Publisher: Transportation Research Board
ISBN: 0309283507
Category : Technology & Engineering
Languages : en
Pages : 73
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"TRB's National Cooperative Highway Research Program (NCHRP) Report 738: Evaluating Pavement Strategies and Barriers for Noise Mitigation presents a methodology for evaluating feasibility, reasonableness, effectiveness, acoustic longevity, and economic features of pavement strategies and barriers for noise mitigation. The methodology uses a life-cycle cost analysis to examine the economic features of mitigation alternatives, the FHWA Traffic Noise Model to integrate the noise reduction performance of pavements and barriers, and on-board sound intensity measurements as an input to the prediction model. The appendixes contained in the research agency's final report provide elaborations and detail on several aspects of the research. The appendixes are not included with the print version of the report, but are available online." --Publisher description.
Author: John T. Harvey
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 203
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Author: Richard Sohaney
Publisher: Createspace Independent Publishing Platform
ISBN: 9781495280849
Category : Technology & Engineering
Languages : en
Pages : 64
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This report provides guidance and better practice recommendations to the NPS for selecting pavement surfaces to minimize tire-pavement noise. The report contains an overview of common technologies and methods for quieter pavements, descriptions of research and quieter pavement specifications developed by several state agencies, and a directory of state agency noise and materials/pavement engineers. A brief introduction to some of the fundamentals of tire-pavement noise is included in an appendix.
Author: Washington (State). Department of Transportation
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 4
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Author: National Academy of Engineering
Publisher: National Academies Press
ISBN: 0309156327
Category : Technology & Engineering
Languages : en
Pages : 210
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Exposure to noise at home, at work, while traveling, and during leisure activities is a fact of life for all Americans. At times noise can be loud enough to damage hearing, and at lower levels it can disrupt normal living, affect sleep patterns, affect our ability to concentrate at work, interfere with outdoor recreational activities, and, in some cases, interfere with communications and even cause accidents. Clearly, exposure to excessive noise can affect our quality of life. As the population of the United States and, indeed, the world increases and developing countries become more industrialized, problems of noise are likely to become more pervasive and lower the quality of life for everyone. Efforts to manage noise exposures, to design quieter buildings, products, equipment, and transportation vehicles, and to provide a regulatory environment that facilitates adequate, cost-effective, sustainable noise controls require our immediate attention. Technology for a Quieter America looks at the most commonly identified sources of noise, how they are characterized, and efforts that have been made to reduce noise emissions and experiences. The book also reviews the standards and regulations that govern noise levels and the federal, state, and local agencies that regulate noise for the benefit, safety, and wellness of society at large. In addition, it presents the cost-benefit trade-offs between efforts to mitigate noise and the improvements they achieve, information sources available to the public on the dimensions of noise problems and their mitigation, and the need to educate professionals who can deal with these issues. Noise emissions are an issue in industry, in communities, in buildings, and during leisure activities. As such, Technology for a Quieter America will appeal to a wide range of stakeholders: the engineering community; the public; government at the federal, state, and local levels; private industry; labor unions; and nonprofit organizations. Implementation of the recommendations in Technology for a Quieter America will result in reduction of the noise levels to which Americans are exposed and will improve the ability of American industry to compete in world markets paying increasing attention to the noise emissions of products.
Author: Michael T. McNerney
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 65
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Author: Ulf Sandberg
Publisher:
ISBN: 9789163126109
Category : Automobiles
Languages : en
Pages : 616
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Author: Manuel Trevino-Frias
Publisher:
ISBN:
Category : Automobiles
Languages : en
Pages : 126
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