Adjustment of Nationwide Significant Risk Threshold

Under title 49 Code of Federal Regulations, Use of Locomotive Horns at Public Highway-Rail Grade Crossings, FRA is updating the Nationwide Significant Risk Threshold (NSRT). This action is needed to ensure the public has the proper permissible risk threshold to evaluate risk resulting from prohibiting routine locomotive horn sounding at highway-rail grade crossings located in quiet zones. This is the seventh update to the NSRT and it is increasing from 14,347 to 14,723.