Editing Loading gauge (section)

====Double-decker carriages====
[[File:IC2000 Zürich - Luzern.jpg|thumb|Zürich – Lucerne [[IC 2000]] double-decker Intercity train]]
[[File:TGVDuplex Centre.JPG|thumb|Double-decker carriage as used on French [[TGV]] railways]]
A specific example of the value of these loading gauges is that they permit [[Bilevel rail car|double decker]] passenger carriages. Although mainly used for suburban commuter lines, France is notable for using them on its high speed TGV services: the [[SNCF]] [[TGV Duplex]] carriages are {{convert|4303|mm|ftin|frac=8}} high,<ref>{{cite conference
| title = Rollmaterial
| first = Matthias
| last = Handschin
| date = 2003-09-22
| conference = BTS Bahn Technik - Seminar 2003
| conference-url =
| institution = SBB
| location = Bern
| pages = 51–52
| language = German
| trans-title = rolling stock 
}}</ref> the Netherlands, Belgium and Switzerland feature large numbers of double decker intercity trains as well. In Germany the [[Bombardier Twindexx]] was introduced in InterCity service in December 2015.