The [[national roads]] in Germany are called [[Bundesstraße]]n (federal road). Their numbers are usually well known to the road users, as they appear (written in black digits on a yellow rectangle with black border) on direction traffic signs and in street maps. A Bundesstraße is often referred to as "B" followed by its number, for example "B 1", one of the main east-west routes. More important routes have lower numbers. Odd numbers are usually applied to east-west oriented roads, and even numbers for north-south routes. Bypass routes are referred to with an appended "a" (alternative) or "n" (new alignment), as in "B 56n".
Other main public roads are maintained by the [[States of Germany|Bundesländer]] (states), called [[Landesstraße]] (country road) or Staatsstraße (state road). The numbers of these roads are prefixed with "L", "S" or "St", but are usually not seen on direction signs or written in maps. They appear on the kilometre posts on the roadside. Numbers are unique only within one state.
The [[Landkreis]]e (districts) (number prefix "K") and municipalities are in charge of the minor roads and streets within villages, towns and cities.
