Action
Notice of Adjustment of the Nationwide Significant Risk Threshold.
Summary
In accordance with 49 CFR part 222, appendix D, FRA is updating the Nationwide Significant Risk Threshold (NSRT). This action is needed to ensure that the public has the proper threshold of permissible risk for calculating quiet zones established in relationship to the NSRT. This is the first update to the NSRT since the final rule entitled "Use of Locomotive Horns at Highway-Rail Grade Crossings" was published on April 27, 2005 (70 FR 21844). This notice increases the Nationwide Significant Risk Threshold (NSRT) from 17,030 to 19,047.