The Federal Railroad Administration has developed an analytic model to assess the noise impact of train horns in the vicinity of highway-rail grade crossings. This method uses a spreadsheet train horn noise model to predict noise levels to the side of the railway and anticipated effects using FRA noise impact criteria.

The model is available to download from this page.

Download MS Excel spreadsheet model

Also available from this page are some topical questions and answers concerning FRA's noise analysis of locomotive horns.

Horn Noise Questions and Answers