city data | customers | build network | nearest neighbor | ant colony optimization  
The database contains:

An amount of 1062 street-names,
2512 intersections and nodes,
3370 roads (internodes),
connections representing traffic rules and restrictions 12921 data
and 21 customers
all over Darmstadt city.
This site belongs to Dr.-Ing. Nugroho Fredivianus.
It was a part of his master thesis at the Darmstadt University of Applied Sciences, which was an extension to
his bachelor thesis at the Institut Teknologi Sepuluh Nopember in Surabaya, Indonesia.
Now he is currently working as a postdoctoral researcher at the University of Kassel
after previously obtaining his PhD at the Karlsruhe Institute of Technology, and here's the proof. ;)

For those who wants something NEW, click here for a Django/Python version of identical algorithm with real maps!