<?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 signal towers</topic></authority><related type="narrower"><topic>railroad signal houses</topic></related><related type="other"><topic>railroad signals</topic></related><related type="broader"><topic>rail transportation structures</topic></related><related type="broader"><topic>signal towers</topic></related><variant type="other"><topic>switch towers</topic></variant><variant type="other"><topic>interlocking towers</topic></variant><variant type="other"><topic>railroad signal tower</topic></variant><variant type="other"><topic>railway signal towers</topic></variant><variant type="other"><topic>signal boxes</topic></variant><variant type="other"><topic>signal cabin</topic></variant><variant type="other"><topic>signal towers</topic></variant><variant type="other"><topic>signal towers, railroad</topic></variant><variant type="other"><topic>signalboxes</topic></variant> <note xml:lang="en"><![CDATA[ Structures, often tower-like, from which signals are sent to control the movements of railway trains. They typically house the control equipment for signal apparatuses and switches. ]]></note></mads>