Editing Route number (section)

==== Bundesstraßen ====
Bundesstraßen are national [[highway]]s, their numbers consist of the letter B and a number:
* 1-digit numbers are more important than 2- or 3-digit numbers;
* the first ten roads span the entire country, the 2-digit roads were assigned sequentially in clusters connecting the major regions, and the 3-digit roads are usually shorter connector roads.
* short branches of Bundesstraßen are sometimes signed with the letter "a" (e.g. B 27a); and
* rerouted Bundesstraßen may be given numbers with an appended "n" (e.g. B 7n).

[[West Berlin]] once had its own Bundesstraßen with letters.