Download or read book Tnm Version 2 5 Addendum to Validation of Fhwa s Traffic Noise Model Tnm written by U.s. Department of Transportation and published by CreateSpace. This book was released on 2013-12-15 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Volpe Center Acoustics Facility (Volpe) in support of the Federal Highway Administration (FHWA) is conducting a multiple-phase study to assess the accuracy and make recommendations on the use of FHWA's Traffic Noise Model (TNM). The TNM Validation Study involves highway noise data collection and TNM modeling for the purpose of data comparison. In 2002, Volpe completed Phase 1 of the study. For this phase, over 100 hours of traffic noise data were collected at seventeen highway sites around the country. The seventeen sites included: open areas next to the highway with acoustically soft ground (e.g., lawn); open areas with acoustically hard ground (e.g., pavement or water); and areas next to the highway with an open area behind a single noise barrier. Results indicated that TNM Version 2.0 was, on average, over-predicting when measured sound level data were not calibrated using a reference microphone, i.e., when site bias was not accounted for. This issue of over-prediction initiated the development of TNM Version 2.5, which addresses the over-prediction and also has other acoustical improvements. This addendum to the Phase 1 report includes results generated with TNM Version 2.5, where the results show TNM's improved performance.
Download or read book Validation of Fhwa s Traffic Noise Model Tnm written by U.s. Department of Transportation and published by CreateSpace. This book was released on 2013-12 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Volpe Center Acoustics Facility, in support of the Federal HighwayAdministration (FHWA) and the California Department of Transportation(Caltrans), has been conducting a study to quantify and assess the accuracyof FHWA's Traffic Noise Model (TNM) and make recommendations on its use. The TNM Validation Study involves highway noise data collection and TNMmodeling for the purpose of data comparison. Phase 1 of the study has beencompleted. For this phase, over 100 hours of traffic noise data werecollected at 17 highway sites around the country.
Download or read book Tnm Version 2 5 Addenum to Validation of Fhwa Traffic Noise Model Tnm written by U.s. Department of Transportation and published by CreateSpace. This book was released on 2013-12 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Volpe Center Acoustics Facility (Volpe) in support of the Federal Highway Administration(FHWA) is conducting a multiple-phase study to assess the accuracy and make recommendations onthe use of FHWA's Traffic Noise Model (TNM). The TNM Validation Study involves highway noisedata collection and TNM modeling for the purpose of data comparison. In 2002, Volpe completedPhase 1 of the study. For this phase, over 100 hours of traffic noise data were collected atseventeen highway sites around the country. The seventeen sites included: open areas next tothe highway with acoustically soft ground (e.g., lawn); open areas with acoustically hardground (e.g., pavement or water); and areas next to the highway with an open area behind asingle noise barrier. Results indicated that TNM Version 2.0 was, on average, over-predictingwhen measured sound level data were not calibrated using a reference microphone, i.e., whensite bias was not accounted for.
Download or read book Fhwa Traffic Noise Model User s Guide written by Cynthia S. Y. Lee and published by Createspace Independent Publishing Platform. This book was released on 2002-03-30 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: In March 1998, the Federal Highway Administration (FHWA) Office of Natural Environment, released the FHWA Traffic Noise Model (FHWA TNM) Version 1.0, a state-of-the-art computer program for highway traffic noise prediction and analysis. Since then, the FHWA, with assistance from the Volpe Center Acoustics Facility (Volpe Center) and Foliage Software Systems (FSS), have released updates of TNM (Versions 1.0a, and 1.0b) in March 1999 and August 1999, respectively. In support of the FHWA and the California Department of Transportation, the Volpe Center and FSS released Version 1.1 in September 2000. TNM 2.0 is the latest release of the TNM software. Two companion reports were released with TNM Version 1.0, a Technical Manual that describes the acoustics within TNM and a User's Guide. In addition, prior to TNM release, a data report was published that describes the vehicle noise-emissions data base within TNM. This document is an addendum to the FHWA TNM Version 1.0 User's Guide. It details the enhancements in the program up to and including Version 2.0.
Download or read book Evaluation Validation Testing and Guidance on the Use of the New Federal Highway Administration Traffic Noise Model written by Rennie Williamson and published by . This book was released on 1997 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FHWA Traffic Noise Model TNM Pavement Effects Implementation Study written by United States Department of Transportation and published by CreateSpace. This book was released on 2013-12 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Volpe Center Acoustics Facility, in support of theFederal Highway Administration(FHWA), investigatedthe implementation of pavement effects inthe FHWA Traffic Noise Model (TNM). Three options were considered, resulting in the recommendation of two options: 1) implementation of user-defined pavement-specific emission levels (REMELs), with proof of adequate data; and 2) implementation of on-board sound intensity (OBSI)-adjusted tire/pavement noise source levels, implemented as a large database in the FHWA TNM and also as a user-defined option. Each option would also include adjusting for the pavement sound absorption by applying pavement-specific effective flow resistivity (EFR) values.
Download or read book Evaluation of the FHWA Traffic Noise Model TNM for Highway Traffic Noise Prediction in the State of Colorado written by Michael Hankard and published by . This book was released on 2006 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2002, CDOT undertook this study in an effort to better understand the complexities of the Federal Highway Administration's new Traffic Noise Model (TNM). The research involved three analysis.
Download or read book Development of National Reference Energy Mean Emission Levels for the FHWA Traffic Noise Model FHWA TNM Version 1 0 written by Gregg G. Fleming and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supplemental Guidance on the Application of FHWA s Traffic Noise Model TNM written by Harris, Miller, Miller & Hanson Inc and published by . This book was released on 2014 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Report 791: Supplemental Guidance on the Application of FHWA's Traffic Noise Model (TNM) provides state departments of transportation staff and other transportation professionals with technical guidance on using the FHWA TNM. FHWA has provided substantial guidance for the routine application of TNM, but scenarios exist for which there is no technical guidance. The report explores ways to model traffic-generated noise in a variety of settings that have not been addressed. The project webpage includes Appendices A through L of the contractor's final report."--Publisher description.
Download or read book FHWA Traffic Noise Model TNM Pavement Effects Implementation Study written by Judith L. Rochat and published by . This book was released on 2012 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Volpe Center Acoustics Facility, in support of the Federal Highway Administration (FHWA), investigated the implementation of pavement effect sin the FHWA Traffic Noise Model (TNM). Three options were considered, resulting in the recommendation of two options: 1) implementation of user-defined pavement-specific emission levels (REMELs), with proof of adequate data; and 2) implementation of on-board sound intensity (OBSI)-adjusted tire/pavement noise source levels, impelemented as a large database in the FHWA TNM and also as a user-defined option. Each option would also include adjusting for the pavement sound absorption by applying pavement-specific effective flow resistivity (EFR) values.
Download or read book Noise Model to monitor Case Study written by Benjamin R. Sperry and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Ohio Department of Transportation (ODOT) noise program includes an inventory of more than 250 miles of noise barriers around the state. Each noise barrier constructed must be analyzed using the FHWA Traffic Noise Model (TNM) software program to determine if the construction of the barrier is justified. This research study was initiated to identify opportunities to improve the accuracy and validity of ODOT's traffic noise analysis and TNM modeling specifications with specific attention made to the modeling of heavy trucks. Over 44 hours of traffic noise data were collected at noise-sensitive areas at a Type II noise wall project being constructed along Interstate 270 in southeast Columbus. A "model-to-monitor" approach was used to analyze the field-measured noise data and compare the measured traffic noise levels with the traffic noise levels predicted using a robust TNM layout developed by the research team. The results of the analysis were consistent with other national research studies on the topic of meteorological effects, modeling residential building structures, and vegetation effects. Consequently, several useful strategies to aid in improving the accuracy of the traffic noise analysis and modeling process were identified. It is recommended that ODOT revise its traffic noise analysis procedures to carry out field studies only under calm (e.g., no wind) conditions. Additionally, ODOT's TNM specifications should be revised to include modeling of residential structures near the freeway as TNM noise barrier objects and that greater attention be paid to roadside vegetation in the modeling process and highway construction process.
Download or read book Ground and Pavement Effects Using FHWA s Traffic Noise Model 2 5 written by Judith L. Rochat and published by . This book was released on 2010 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Volpe Center Acoustics Facility, in support of the Federal Highway Administration (FHWA) has been conducting a study to investigate the effects of using different ground types basd on an improved understanding of the characteristics of the ground types defined in FHWA's Traffic Noise Model (TNM) version 2.5. This study also investigates the effects of using specific pavement types, as opposed to Average pavement, when the pavement type is known. The results of this study indicate that improvements in the correlation between predicted and measured results can be achieved by selecting the best ground type and pavement type for the model."--Technical report documentation page.
Download or read book Hard site Soft site Study written by Grant S. Anderson and published by . This book was released on 1999 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Federal Highway Administration has promulgated its new highway-noise computer program, the FHWA Traffic Noise Model (TNM), for eventual use on all federal-aid highway projects. When the California Department of Transportation (Caltrans) investigated TNM's computed sound levels, to prepare for statewide adoption, it noticed that TNM computes higher closeby sound levels over hard intervening ground, by some 5 decibels at 20 meters, then over soft intervening ground. In comparison, the current Caltrans highway-noise computer program, Sound 32, computes only a 2-decibel hard-site increase at 20 meters (1.2 decibels at 15 meters). Moreover, Sound32s 2-decibel increase at 20 meters generally agrees better with past Caltrans field measurements than does TNM's 5-decibel increase. Is TNM's 5-decibel hard-site increase truly "real"? In other words, would thorough field measurements of hourly traffic sound levels over hard ground confirm this higher TNM value (5 decibels) at 20 meters or would they confirm Sound32's lower value (2 decibels), instead? The answer to this question awaits further field measurements, now being planned by FHWA through the Volpe National Transportation Systems Center (VNTSC).
Download or read book FHWA Highway Traffic Noise Prediction Model Final Report written by Timothy M. Barry and published by . This book was released on 1978 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FHWA Traffic Noise Model User s Guide written by and published by . This book was released on 1998 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Noise and Vibration Control written by Malcolm J. Crocker and published by John Wiley & Sons. This book was released on 2007-10-05 with total page 1594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two of the most acclaimed reference works in the area of acoustics in recent years have been our Encyclopedia of Acoustics, 4 Volume set and the Handbook of Acoustics spin-off. These works, edited by Malcolm Crocker, positioned Wiley as a major player in the acoustics reference market. With our recently published revision of Beranek & Ver's Noise and Vibration Control Engineering, Wiley is a highly respected name in the acoustics business. Crocker's new handbook covers an area of great importance to engineers and designers. Noise and vibration control is one largest areas of application of the acoustics topics covered in the successful encyclopedia and handbook. It is also an area that has been under-published in recent years. Crocker has positioned this reference to cover the gamut of topics while focusing more on the applications to industrial needs. In this way the book will become the best single source of need-to-know information for the professional markets.
Download or read book Highway Traffic Noise Analysis and Abatement written by United States. Federal Highway Administration. Office of Environment and Planning. Noise and Air Quality Branch and published by . This book was released on 1995 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
