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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Use of Locomotive Horns at Highway-Rail Grade Crossings

Notice of determination.

FRA's Interim Final Rule on the Use of Locomotive Horns at Highway-Rail Grade Crossings provides for annual recalculation of the Nationwide Significant Risk Threshold (NSRT). The NSRT is a number reflecting the measure of risk, calculated on a nationwide basis, which reflects the average level of risk to the motoring public at public highway-rail grade crossings equipped with flashing lights and gates at which locomotive horns are sounded. The newly recalculated NSRT is 16,988.

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