and hourly by the Sieg-Dill-Bahn (RB 95) (only to and from Dillenburg). The mostly two-track electrified Sieg line (Siegstrecke) is served, usually hourly, by the Rhein-Sieg-Express (RE 9) and Sieg-Dill-Bahn (RB 95) services (only to and from Au). Bus transport On 18 March 1895, the Netphener Omnibusgesellschaft opened the world's first busline using a petrol-powered omnibus, running a service from its base in Netphen to Siegen and Deuz. Today, local road transport offers many regional, express and local buses, along with a night bus service connecting Siegen with its outlying communities and neighbouring towns. They are run by the South Westphalia Transport Services (Verkehrsbetriebe Westfalen-Süd; VWS) whose headquarters are in Siegen. For the whole of local public transport, the tariff of the South Westphalia Transport Community (Verkehrsgemeinschaft Westfalen-Süd; VGWS) applies, regardless of the North Rhine-Westphalia tariff. Roads With regard to long-distance roads, the city of Siegen is connected to Autobahnen A 45 (Dortmund – Aschaffenburg) and A 4 (Cologne – Olpe), and to Federal Highways (Bundesstraßen) 54, 54n, 62 and 62n. Siegen is home to the tallest bridge of the A 45 and one of the highest in Germany, the Siegtalbrücke. Built from 1964 to 1969, it is approximately 96 m high and 1 050 m long. The shape that the city takes has much to do with the Hüttentalstraße (HTS) (Federal Highways 54n and 62n) which serves as a municipal Autobahn – much of it elevated – that runs through the city area. The A 4 between Wenden and Kreuztal has been newly built. In the heights over Kreuztal's outlying community of Krombach, it now joins with the HTS. On this 12-kilometre stretch of highway are eight valley bridges as well as ten under- and overpasses. This new part was opened on 1 December 2007. Economy Siegen is South Westphalia's service and administrative centre. Much of its industry is based on metalworking. Pedestrian precincts in Bahnhofsstraße ("Railway Station Street") and Kölner Tor ("Cologne Gate"), both downtown, have made shopping in Siegen very convenient, as have the shopping centres City-Galerie (opened in 1998) and Sieg Carré (opened in 2006, both downtown) and Siegerlandzentrum (Siegen-Weidenau), and the Marburger Straße shopping street (downtown). In 2005, an IKEA store and a Peek & Cloppenburg location opened. Public institutions Siegen is home to the Siegen-Wittgenstein district administration and location of a Chamber of Industry and Trade (Industrie- und Handelskammer, or IHK, one of 81