<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">railroad signals</topic></authority><related type="other"><topic>railroad signal towers</topic></related><related type="broader"><topic>signaling equipment</topic></related><variant type="other"><topic>railroad signal</topic></variant> <note xml:lang="en"><![CDATA[ Signals that govern the movement of trains, typically using flags or lights; generally located at the entrances of sections of railroad tracks. ]]></note></mads>