<?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">monorails</topic></authority><related type="broader"><topic>rail transit systems</topic></related><variant type="other"><topic>monorail car</topic></variant><variant type="other"><topic>mono-rail</topic></variant><variant type="other"><topic>monorail</topic></variant><variant type="other"><topic>monorail lines</topic></variant><variant type="other"><topic>monorail railroads</topic></variant><variant type="other"><topic>monorail systems</topic></variant><variant type="other"><topic>railroads, monorail</topic></variant><variant type="other"><topic>systems, monorail</topic></variant> <note xml:lang="en"><![CDATA[ Railway systems employing  a single rail either above or beneath the railway cars. Monorail systems first appeared in the early 20th century and have usually been propelled by conventional electric traction motors. Railway systems employing  a single rail either above or beneath the railway cars. Monorail systems first appeared in the early 20th century and have usually been propelled by conventional electric traction motors. ]]></note></mads>