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In this paper a comparison between first order microscopic and macroscopicdifferential models of crowd dynamics is established for an increasing number$N$ of pedestrians. The novelty is the fact of considering massive agents,namely particles whose individual mass does not become infinitesimal when $N$grows. This implies that the total mass of the system is not constant but growswith $N$. The main result is that the two types of models approach one anotherin the limit $N\to\infty$, provided the strength and/or the domain ofpedestrian interactions are properly modulated by $N$ at either scale. This isconsistent with the idea that pedestrians may adapt their interpersonalattitudes according to the overall level of congestion.

Comparing first order microscopic and macroscopic crowd models for an increasing number of massive agents