1. A method, performed by at least one apparatus, the method comprising:obtaining probe data comprising a plurality of probe samples of a multi-dimensional probe sample space, the probe data being indicative of a multi-modal traffic scenario;
obtaining a gap value indicative of a threshold gap distance between a potential cluster element and a cluster for deciding whether the potential cluster element is to be added to said cluster, wherein the gap value indicates a fraction of a total size of the probe sample space covered by the probe samples; and
performing a cluster analysis for at least a part of the probe samples of the probe data using said gap value, said cluster analysis comprising:
grouping at least a part of the probe samples with respective clusters utilizing, at least in part, the gap value, each cluster being indicative of a mode of the multi-modal traffic scenario.