German orthography
Compound words, including nouns, are written together, e.g. "Haustür" (Haus+Tür; house door), "Tischlampe" (Tisch+Lampe; table lamp), "Kaltwasserhahn" (Kalt+Wasser+Hahn; cold water tap/faucet). This can lead to long words: the longest word in regular use, "Rechtsschutzversicherungsgesellschaften" ("legal protection insurance companies"), consists of 39 letters; while the longest German word ever published ("Donaudampfschiffahrtselektrizitätenhauptbetriebswerkbauunterbeamtengesellschaft", "Association for subordinate officials of the head office management of the Danube steamboat electrical services") has 79 letters.
Transport in Germany
The Autobahn is the German federal highway system. The official German term is (plural "", abbreviated "BAB"), which translates as "federal motorway". Where no local speed limit is posted, the advisory limit "(Richtgeschwindigkeit)" is 130 km/h. The "Autobahn" network had a total length of about in 2016, which ranks it among the most dense and longest systems in the world. Only federally built controlled-access highways meeting certain construction standards including at least two lanes per direction are called ""Bundesautobahn"". They have their own, blue-coloured signs and their own numbering system. All "Autobahnen" are named by using the capital letter A, followed by a blank and a number (for example A 8).