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Parallel Barrier Effectiveness Under Free Flowing Traffic Conditions
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Book Synopsis Parallel Barrier Effectiveness Under Free-flowing Traffic Conditions by : Gregg G. Fleming
Download or read book Parallel Barrier Effectiveness Under Free-flowing Traffic Conditions written by Gregg G. Fleming and published by . This book was released on 1992 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents the results of a measurement study performed at a highway noise barrier site located along Interstate 495 in Montgomery County, Maryland. The objective of the study was to measure the degradation in acoustic performance of a highway noise barrier due to the close proximity of a parallel barrier on the opposite side of the roadway. The test site selected for measurements consisted of a contiguous arrangement of two parallel reflective noise barriers followed by a single noise barrier. Five-minute, energy-averaged, A-weighted noise levels were computed from data measured simultaneously at identical heights and offset positions behind the single and parallel barrier arrangements. A comparison of the measured and predicted results is presented.
Book Synopsis FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1992 by :
Download or read book FHWA Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1992 written by and published by . This book was released on 1992 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Planning and Environmental Resources Catalog by : Lynette J. Engelke
Download or read book Planning and Environmental Resources Catalog written by Lynette J. Engelke and published by . This book was released on 1996 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis US 101 High Occupancy Vehicle (HOV) Gap Closure Project, Marin Cuunty by :
Download or read book US 101 High Occupancy Vehicle (HOV) Gap Closure Project, Marin Cuunty written by and published by . This book was released on 1999 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1994 by :
Download or read book Nationally Coordinated Program of Highway Research, Development, and Technology. Annual Progress Report. Fiscal Year 1994 written by and published by . This book was released on 1995 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Parallel Barrier Effects for Distant Receivers by :
Download or read book Parallel Barrier Effects for Distant Receivers written by and published by . This book was released on 2002 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research described in this report determined the effects of parallel noise barriers as a contributing factor to the perception of increased noise levels by distant receivers. Data to quantify the characteristics of noise propagation was acquired at the HAM-71-11.44 and SUM-8-6.8 parallel barrier sites. Both sites had complaints of increased noise levels due to barrier construction. An in-situ test system using a point source was devised and developed to identify the existence, location, and relative intensity of reflections between parallel noise barriers. Multiple reflections from barrier walls existed at each receiver location for all parallel barrier sites tested. The reflections increased noise levels for receivers from below 1 dB for receivers closest to the noise barriers, to increases approaching the theoretical maximum of 3 dB for receivers farther from the noise barriers. Reflection contributions to receiver sound levels increased with greater receiver distance from the highway up to 120 m from the noise barrier. A mean barrier attenuation of 2-4 dB was predicted for modeled receivers 180m to 420m from the near barrier. The propagation path height change with the barrier construction increased received levels from a test signal point source by an average of 3 to 4 dB, but as much as 14 dB for receivers 180m to 360m from the barriers. The increase in received levels was attributed to a reduction in ground attenuation caused by the increased ray path height following barrier construction. The sound-absorbing panels used to retrofit the west side noise barrier on the Summit 8 project substantially reduced the contribution of reflections for east side receivers. The reduction in reflection contributions due to the sound-absorbing panels was greater for receivers at increased distances from the highway. The results of the investigation support the hypothesis that many of these distant receivers realized little barrier attenuation following noise barrier construction. Further, the amount of barrier attenuation realized was in many cases more than offset by the loss in ground attenuation due to the change in noise path height due to barrier construction. Finally, reflections between parallel noise barriers increased noise levels above the levels expected for single barriers.
Download or read book Public Roads written by and published by . This book was released on 1996 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance Evaluation of Experimental Highway Noise Barriers by : Gregg G. Fleming
Download or read book Performance Evaluation of Experimental Highway Noise Barriers written by Gregg G. Fleming and published by . This book was released on 1994 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Route 20 (FAP 301) from Illinois Route 84 North of Galena to Bolton Road Northwest of Freeport, Jo Daviess and Stephenson Counties by :
Download or read book U.S. Route 20 (FAP 301) from Illinois Route 84 North of Galena to Bolton Road Northwest of Freeport, Jo Daviess and Stephenson Counties written by and published by . This book was released on 2004 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nationally Coordinated Program of Highway Research, Development, and Technology by :
Download or read book Nationally Coordinated Program of Highway Research, Development, and Technology written by and published by . This book was released on 1992 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preliminary Assessment of Traffic Noise Effectiveness for Project HAM-71-11.44 by : Lloyd Allen Herman
Download or read book Preliminary Assessment of Traffic Noise Effectiveness for Project HAM-71-11.44 written by Lloyd Allen Herman and published by . This book was released on 1997 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: The completion of the traffic noise barrier project HAM-71-11.44 in Ohio was met with strong reaction from those living in the project area. Many residents complained that noise levels had actually increased at their location as a result of the project, while others claimed that levels had decreased where they lived. The preliminary assessment project was initiated to determine the nature and extent of any problems that had occurred with the construction of the noise barriers. A two-pronged approach was used for the study. First, a survey of residents was conducted to characterize the residents' perception of changes in noise levels due to construction of the barriers. Second, a physical investigation of the project area was made, which included roadway and barrier geometries, traffic characteristics before and after barrier construction, and acoustical measurements to characterize the noise environment in the project area.
Download or read book Highway Research Abstracts written by and published by . This book was released on 1992 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Strong Towns by : Charles L. Marohn, Jr.
Download or read book Strong Towns written by Charles L. Marohn, Jr. and published by John Wiley & Sons. This book was released on 2019-10-01 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new way forward for sustainable quality of life in cities of all sizes Strong Towns: A Bottom-Up Revolution to Build American Prosperity is a book of forward-thinking ideas that breaks with modern wisdom to present a new vision of urban development in the United States. Presenting the foundational ideas of the Strong Towns movement he co-founded, Charles Marohn explains why cities of all sizes continue to struggle to meet their basic needs, and reveals the new paradigm that can solve this longstanding problem. Inside, you’ll learn why inducing growth and development has been the conventional response to urban financial struggles—and why it just doesn’t work. New development and high-risk investing don’t generate enough wealth to support itself, and cities continue to struggle. Read this book to find out how cities large and small can focus on bottom-up investments to minimize risk and maximize their ability to strengthen the community financially and improve citizens’ quality of life. Develop in-depth knowledge of the underlying logic behind the “traditional” search for never-ending urban growth Learn practical solutions for ameliorating financial struggles through low-risk investment and a grassroots focus Gain insights and tools that can stop the vicious cycle of budget shortfalls and unexpected downturns Become a part of the Strong Towns revolution by shifting the focus away from top-down growth toward rebuilding American prosperity Strong Towns acknowledges that there is a problem with the American approach to growth and shows community leaders a new way forward. The Strong Towns response is a revolution in how we assemble the places we live.
Book Synopsis Surface Transportation Research and Development Plan: Compendium of program abstracts by :
Download or read book Surface Transportation Research and Development Plan: Compendium of program abstracts written by and published by . This book was released on 1993 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Association of State Highway and Transportation Officials. Task Force for Roadside Safety Publisher : ISBN 13 : Total Pages :560 pages Book Rating :4.0/5 ( download)
Book Synopsis Roadside Design Guide by : American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Download or read book Roadside Design Guide written by American Association of State Highway and Transportation Officials. Task Force for Roadside Safety and published by . This book was released on 1989 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation Research Record written by and published by . This book was released on 1992 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
