A recently developed analysis tool is the FHWA Roadway Construction Noise Model (RCNM). The RCNM is a new, state-of-the-art computer program that enables the prediction of construction noise levels for a variety of construction operations based on a compilation of empirical data and the application of acoustical propagation formulas. The program enables the calculation of construction noise levels in more detail than manual methods while avoiding the need to collect extensive amounts of project-specific input data.
FHWA Roadway Construction Noise Model (FHWA RCNM) Version 1.1.. To download the FHWA RCNM Version 1.1, click here. (7.5 MB zip)
This model is not required to be used on Federal-aid projects; however this model is a screening tool that can be used for the prediction of construction noise during the various stages of project development and construction. Several program activities will be initiated to provide guidance on the various ways the FHWA RCNM can be implemented into project development and construction activities. The attached memo provides additional information on the FHWA RCNM.
If the FHWA RCNM version 1.0 has already been installed, then it must be uninstalled before installing version 1.1.
The FHWA RCNM version 1.0 Distribution Memo - February 15, 2006. FHWA RCNM Version 1.0 User Guide (HTML version) or (PDF version 1.24 MB) is a great resource document that illustrates how to best utilize the FHWA RCNM Version 1.0
Additional Information Regarding the FHWA RCNM.
RCNM is a national model for the prediction of construction noise. This model is not required for use on Federal-aid projects.
The RCNM version 1 series (RCNM 1.0 and RCNM 1.1) is based on the construction noise prediction spreadsheet developed for the Central Artery/Tunnel Project in Boston, Massachusetts (CA/T Project or "Big Dig") by Parsons Brinckerhoff Quade & Douglas, Inc. The CA/T Project is one of the largest urban construction project ever conducted in the United States and had one of the most comprehensive noise control specifications ever developed in the United States. RCNM 1 incorporated the CA/T Project's noise limit criteria and extensive construction equipment noise database, where these parameters can be modified according to each user's needs. Users can also activate and analyze multiple pieces of equipment simultaneously and define multiple receptor locations, including land-use type and baseline noise levels, where RCNM will calculate sound level results for multiple metrics.
The intended use for RCNM 1 is as a construction noise screening tool.
It is based on the CA/T prediction spreadsheet RCNM predicts noise from highway construction operations based on a compilation of empirical data and the application of acoustical propagation formulas. It enables the calculation of construction noise levels in more detail than manual methods while avoiding the need to collect extensive amounts of project-specific input data.
