
  +--------------------------------------------+
  |                                            v
+------+     +---------+     +---------+     +--------+     +--------+
| Bonn | --> | Ulm     | --> | Bautzen | --> | Berlin | --> | Kassel |
+------+     +---------+     +---------+     +--------+     +--------+
  |            |
  |            |
  |            v
  |          +---------+
  +--------> | Koblenz |
             +---------+
