mainly Midi low-floor buses built by MAN. Most journeys made by bus 223 are arranged in response to demand. Moreover, many regional buses also serve Idstein, linking important areas not served by the town bus as they go. 220 Idstein–Niedernhausen–Oberjosbach (formerly 5460) 224 Idstein–Ehrenbach–Görsroth–Idstein 225 Railway station–ZOB–Nassauviertel–Hünstetten–Neuhof–(Wiesbaden) 226 Railway station–ZOB–Nassauviertel–Wallrabenstein–Ketternschwalbach (formerly 103) 227 Görsroth–Idstein 230 Idstein–Esch–Bad Camberg (formerly 5465) 233 Idstein/Bad Camberg–Esch–Wüstems 239 Idstein–Waldems 271 ZOB–Railway station–Am Wörtzgarten–Neuhof–Platte–Wiesbaden main railway station (formerly 5461) Since timetable changes in July 2007, many journeys, particularly on weekends or in the evening, have been served by demand-responsive buses. Bus services in the countryside around Idstein (the Idsteiner Land) are likewise run by ORN, which contracts the work out to companies such as Omnibus Mester from Eppstein-Bremthal, Omnibus Weber, Paul-Reisen or Wahl-Reisen (all from Hünstetten). Established businesses Roughly 200 small and midsize businesses, mainly in crafts and retail sales, characterize Idstein's business life; four out of every five have fewer than ten employees. Among the bigger businesses in town are, for instance, RS systeme GmbH, Motorola GmbH, Jack Wolfskin, DG-Verlag (distribution and logistics), E. Schmitz Trading & Technical Services GmbH, Black & Decker/ELU-Gruppe (Elektrowerkzeuge) and Thermoplast + Apparatebau GmbH (thermoplastic injection-moulded articles). Another important employer and factor in the economy is the Landeswohlfahrtsverband Hessen (Hesse State Welfare Federation) with its SPZ (paediatric centre) Kalmenhof, an institution aiding youths and people with handicaps. As an historically important and modern middle centre and the heart of the Idsteiner Land, Idstein has at its disposal a multi-faceted retail structure. Its location on the Frankfurt/Wiesbaden – Limburg railway and the A 3 and a great number of commuters put the great shopping centres in Limburg an der Lahn and Wiesbaden as well as those throughout the Frankfurt Rhine Main Region in direct competition with the local retailers. Major building projects In the course of the 2002 Hessentag, many great building (and sometimes conversion) projects were undertaken. The building of the connecting road Tiergartenspange reduced traffic in the Old Town. Three new building areas have been developed: Nassau-Viertel (mixed-use area in the town's northwest along Bundesstraße 275) South bypass road Taunusviertel (in the town's southeast) Major building projects since Hessentag New building work on the Grundschule Auf der Au (primary school) and the Erich-Kästner-Schule (completed 2005) New building work on the police station (inner town, completed 2006) in connection with conversion work on the Amtsgericht (court, still in progress) Conversion