The Eifel-Ardennes Ring is a fictional racing circuit consisting of temporarily closed motorways and country roads, which runs up and down the hills of the German Eifel (where the Nürburgring is) and the Belgian Ardennes (where Spa-Francorchamps is). The track layout has not been copied from the real world, instead it has been designed and thoroughly fine-tuned to provide entertaining driving. The white lines are for public road traffic and no track limits for racing. So you are allowed to drive where you want, but be aware that the grass gets bumpier the further off the road you drive.