The trackdays of Endless Summer^® are usually operated according to the “open pitlane” mode, i.e. without grouping. Occasionally, however, vehicle profiles of very different performance – especially high performance – can be expected. In this case, we reserve the right to divide the day into two groups. Normally this does not reduce the driving time, but only limits the choice of the driving time a little. However, it contributes a lot to homogeneity and thus to the satisfaction of the individual participants. The participation fee remains unaffected.