Although mainly used for suburban commuter lines (in Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Italy, Lithuania, Poland, Portugal, Russia, Slovakia, Spain, Sweden, and Switzerland as well as other locations around the world, including Sydney, Australia), France is notable for using them on its high speed TGV services: the SNCF TGV Duplex carriages are 4 meters high, and the Netherlands and Switzerland feature large numbers of double decker intercity trains as well.