Commuter Train in Salt Lake City, Utah 2018

The entire length of FrontRunner corridor (including the southern extension) has been approved as a "Quiet Zone" by the Federal Railroad Administration. "Typically, federal railroad safety regulations require that all train operators sound their horns for 15 to 20 seconds as they approach any road crossing."[37] Essentially a Quiet Zone designation eliminates this requirement. However, for obvious safety reasons, they are not prohibited from sounding their horn, if appropriate. The Quiet Zone applies to all trains (including freight trains) within the same corridor. Each city along the route had to individually apply for the designation, but UTA provided substantial assistance with the process. Several safety upgrades must be in place at all public crossings in order to receive Quiet Zone approval. In addition to the normal automatic warning bells and lights, required upgrades include crossing guards, signs warning that trains do not blare horns in the area, and raised medians (which prevent cars from driving around lowered gates). There are also additional safety features for pedestrians. Prior to the southern extension, FrontRunner had the longest Quiet Zone in the nation—the southern extension doubled the length of the previous Quiet Zone. ~Wikipedia
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