Traktionstadt Weimar is a German-speaking city that appears in the final book of the Mortal Engines Quartet, A Darkling Plain. The Traktionstadtsgesellschaft alliance was born when the burgermister contacted 12 other cities. With the help of its fellow cities, it fought in the Green Storm War to keep the rest of the tractionists safe. During the final battle it was destroyed by The Stalker Fang using ODIN. The tractionists blamed it's destruction on the Green Storm, unaware that the Green Storm had been hit by the Old Tech weapon as well.
It may be based on the city of Weimar in Germany.