+-----------+
| Dresden |
+-----------+
^
|
|
+------+ +---------+ +-------+ +-----------+ +----------+ +---------+
| Bonn | --> | Berlin | --> | Koeln | --> | Frankfurt | --> | Hannover | --> | Hamburg |
+------+ +---------+ +-------+ +-----------+ +----------+ +---------+
| |
| |
v v
+---------+ +-----------+
| Cottbus | | Chemnitz |
+---------+ +-----------+