1.1 Motivation Today's transportation market is far from perfect. Market participants have admission only to a certain fraction of the market and price formation lacks transparency. However, this state is no law of nature since in principle, all market participants could manage to get together somehow and do business - but gaining new business partners beyond existing bonds usually takes too high efforts. After all, the items in transportation markets are usually traded under extreme time pressure: transportation orders have fixed pick-up and delivery deadlines and free transportation...