Fig 1.
(a) Floorplan of platform 3 at Utrecht Central Station (NL). The area monitored by the sensors is highlighted in grey. (b) Sample of 75 passengers waiting for a train to arrive on the 10th of May 2020, during the Covid-19 pandemic. Pedestrians which respect the 1.5m physical distance regulations are colored in green, people who are part of a family-group are colored in blue, distance offenders are colored in red. This classification is performed via the method proposed in Section 5. In this situation only 3 out of the 75 people violate the physical distancing rules. (c) Same number of people distributed over the platform on the 27th of May 2019, one year prior to the Covid-19 outbreak, here about one-third of the people stand closer than 1.5m to someone else.