mayor. Coat of arms Kelsterbach's civic coat of arms might heraldically be described thus: In sable an oak tree with four leaves argent and three acorns Or. The tree stands for the Dreieich royal hunting woods (Dreieich means "Three Oaks" in German). The colours come from the arms borne by the Counts of Isenburg who ruled the village beginning in 1418. The arms were granted in 1925. Town partnerships Baugé, département of Maine-et-Loire, France, since 31 August 1979 Economy and infrastructure Transport Kelsterbach has an interchange on Autobahn A3. By way of Federal Highway (Bundesstraße) B40a and an Autobahn spur route, Autobahn A66 can be reached quickly. Also running through Kelsterbach is Federal Highway B43. Frankfurt S-Bahn lines S 8 and S 9 run from Kelsterbach station to the main railway station in Frankfurt within 15 minutes (four stops), and to the airport in only three minutes (one stop). Infrastructure In 1926, in the course of building the North-South Powerline, a great transformer station was built. This substation today handles voltages of 380, 220 and 110 kV. Owing to the Frankfurt Airport's expansion, the power lines leading to the substation from the south have had to be relocated several times. Today, the wires are borne on low pylons, with all conductors at the same level, leading by the airport to the west. In preparation for building the Northwest Runway, the substation was being moved and modernized with gas insulated switchgear, power lines undergrounded or removed. Kelsterbach has at its disposal a combination indoor and leisure swimming pool. Remodelling and modernization are planned for 2007. Furthermore, also at hand are one of Groß-Gerau district's biggest and most modern town libraries, an integrated comprehensive school, several primary schools, and a special school. Kelsterbach is the only municipality in Hesse that belongs to a district and yet has its own school board. The seven kindergartens under church leadership are coordinated and financially supported by the town. The former stately home houses a youth centre. At sporting grounds and municipal premises, there is a brisk club life (about 90 clubs and organizations). It is not for nothing that Kelsterbach is also called the "town of clubs". Aside from many cultural events, Kelsterbach is known far beyond its limits for its traditional church fair (Kerb) on the first Sunday in September, and for its Old Town Festival (Altstadtfest) a week later. Well developed shopping facilities