Sydney, between Brisbane and Gympie, or between Brisbane and the Gold Coast. Some interurban trains may operate from where suburban lines end, such as Southern Higlands services between Campbelltown and Goulburn, or between Ipswich and Rosewood. These do not have the features of "intercity trains" in other parts of the world, such as booked seats and meal services, but are bare commuter trains. They are properly called interurban rather than intercity, although New South Wales refers to its interurban services as "intercity" trains and Victoria refers to theirs as "regional" trains. Tram-train Tram-trains are railcars or trains which run like trams (streetcars) in city streets, and on heavy rail tracks out to the suburbs or between the cities. Usually, this requires two current systems (German Zweisystemstadtbahn, Stadtbahn with two systems), both the tram voltage (600 or 750 V DC) and the heavy rail high voltage (in Germany, 15 kV AC). The vehicles must also be adapted to the heavy rail's signalling system. This transit mode combines the tram's availability with stops in the street, and the heavy rail's higher speed. They are often faster than most rapid transit (metro) systems. The first system was opened in Karlsruhe in 1992. Their top speed is often 100 km/h, in Kassel as much as 114 km/h. This transit mode is a rebirth of the interurban. Regional and commuter rail Regional rail (also called metropolitan rail, commuter rail, or suburban rail) is an electric or diesel propelled railway for urban passenger train service consisting of local short-distance travel operating between adjacent cities and towns, or between a central city and adjacent suburbs, using either locomotive hauled or multiple unit railroad passenger cars. Regional rail usually provides rail services between towns and cities, rather than purely linking major population hubs in the way inter-city rail does. Regional rail operates outside major cities. Unlike Inter-city, it stops at most or all stations. It provides a service between smaller communities along the line, and also connections with long-distance services. Alternative names are "local train" or "stopping train". Examples include the former BR's Regional Railways, France's TER (Transport express régional) and Germany's DB Regio services. Regional rail operates throughout the day but often at low frequency (once per hour or only a few times a day), whereas commuter rail provides a high-frequency service within a conurbation. Regional trains are usually all seated and provide luggage space, although they