To implement a quiet zone, the Quiet Zone Risk Index must be below the Nationwide Significant Risk Threshold. To lower the Quiet Zone Risk Index, supplementary safety measures can be put into place. Such measures include:
- Gates with medians or canalization devices or traffic separators
- One-way streets equipped with gates that fully block the street
- Temporary closure (i.e., nighttime closure)
- Permanent closure
- Four quadrant gates
The goal is to adequately compensate for the lack of train horns and/or reduce the risk to a level below the Nationwide Significant Risk Threshold.
For more information on Quiet Zones, please visit the FRA's website, http://www.fra.dot.gov/us/content/1318.




