Possibly because you asked them to, perhaps?
OK now we know a bit more about what you are planning on doing.
You are going in June 2011, going straight to Colditz, then to the Alps.
On leaving Colditz, where in the Alps do you intend to go? It is a waste of time bods suggesting roads and places of possible interest between Colditz (near Leipzig) to Salzburg, if you really intend to go to Lucerne.
How long have you allowed yourself to get from Colditz to wherever in the Alps it is you intend to go to?
Let's, for the sake of it, imagine you want to go to the Austrian Alps, say Salzburg. That is a roughly 350 miles and would be a logical place to head for, given your starting point at Colditz.
If it's a day, the most interesting roads you will find are the motorways. If it is, say, three days you could do a bunch of things of possible interest, How about: Dresden (very near Colditz), then down to Prague (a nice city, lots of beer) then Linz (take in Mauthausen concentration camp) then Salzburg (Sound of Music country / ride a tram / eat a cream cake). You are now near enough at the Austrian Alps.
Are you looking for ideas where to go in the Alps, too? Only, your question doesn't mention it, if so.