Train horn noise has been long regarded as a nuisance to the residents of the adjacent communities, in spite of the fact that train horn is an effective deterrent to accidents at highway-rail grade crossings. Federal, state, and local governments are making efforts in mitigating the negative effect of train horn noise. This paper utilized census data and train speed and volume information to develop a GIS-based model that exhibits the train horn noise impact on adjacent populations and demonstrates how these impacts change with altered rail operations. This model serves as a tool for planners, engineers, and decision-makers to gain a better understanding of the most affected areas, thus pursue the most appropriate mitigation measures for the localities.

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