The "Rollende Landstraße" trains transport complete trucks ranging from the truck/trailer combination to semi rigs straight across Europe. This reduces the traffic load on the freeways. Next to Germany, Switzerland and Austria with their Alpine through traffic are probably the most important transit countries in Europe. For this reason the Austrian Federal Railways and the Swiss Federal Railways (through the HUPAC Company) participate with the German Federal Railroad in the "Rollende Landstraße" concept for transport by rail between Germany and Italy. Despite this cross border cooperation, the available capacity has been sufficient up till now for only a small part of the truck transit traffic.