FHWA Traffic Noise Model user's guide (version 2.5 addendum)

2004PDFManualHW-66/AS036Traffic noiseTire/pavement noiseMathematical predictionNoise barriersComputer program documentationTraffic noisePrediction theoryUnited StatesJohn A. Volpe National Transportation Systems Center (U.S.)Lau, Michael CLee, Cynthia S.Y.Rochat, Judith LBoeker, Eric R.Fleming, Gregg G.John A. Volpe National Transportation Systems Center (U.S.)United States. Federal Highway Administration. Office of Natural and Human EnvironmentNTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATIONVolpe National Transportation Systems Center, Technical Reference Center;Federal Highway AdministrationIn March 1998, the Federal Highway Administration (FHWA), Office of Natural andHuman Environment, released the FHWA Traffic Noise Model (TNM), Version 1.0, astate-of-the-art computer model 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 supportof the FHWA and the California Department of Transportation, the Volpe Center andFSS released Version 1.1 in September 2000. Two additional updates were released:TNM 2.0 in May 2002 and TNM 2.1 in March 2003. TNM 2.5 is the latest version ofTNM. Two companion reports were released with TNM Version 1.0, a Technical Manualthat describes the acoustics within TNM and a User's Guide. In addition, prior toTNM release, a data report was published that describes the vehiclenoise-emissions database within TNM. This document is an addendum to the FHWA TNMVersion 1.0 User's Guide. It details the enhancements in the program up to andincluding Version 2.5