Development of national reference energy mean emission levels for the FHWA traffic noise model (FHWA TNM), version 1.0

Volpe National Transportation Systems Center, Technical Reference Center;Federal Highway Administration1995PDFTech ReportFleming, Gregg G.Rapoza, Amanda S.Lee, Cynthia S. Y.John A. Volpe National Transportation Systems Center (U.S.). Acoustics FacilityUnited States. Federal Highway AdministrationNoiseNoise barriersTraffic noiseMathematical predictionStatistical analysisNoiseHighway noiseNoise predictionNoise modelTrafficNoise Model, FHWA TNM, Noise barrierParallel noise barrierInsertion lossVehicle noise emissionREMELDOT-VNTSC-FHWA-96-2FHWA-PD-96-008HW627/H6005/4K2Final Report; July 1993 - November 1995Research and Special Programs Administration, John A. Volpe National Transportation Systems Center (Volpe Center), Acoustics Facility, in support of the Federal Highway Administration (FHWA) and 25 sponsoring state transportation agencies, conducted the National Pooled-Fund Study (NPFS), SP&R 0002-136, titled "Highway Noise Model Data Base Development." This report presents the results of the study, including the measurement, data reduction and analysis procedures used to develop the Data Base. It discusses data for constant-flow and interrupted-flow roadway traffic, and data related to vehicle subsource heights. The Data Base is the foundation around which the acoustic algorithms in the FHWA's Traffic Noise Model (FHWA TNM\uae), Version 1.0 are being structured. This report also presents the statistical methodology used to establish the Data Base for the FHWA TNM. Sound level regressions are presented as a function of several parameters, including vehicle speed, vehicle type, one-third octave-band frequency, roadway pavement type, roadway grade, traffic-flow condition and vehicle subsource height.111