The City of Maastricht is using a track-and-trace app to follow students in a survey that monitors travel behaviour. Project leader Katya Ivanova made the students an offer they can't refuse, 600 euros, in return for their signature, thus making the whole thing legit.

And this week municipal officers started knocking on the doors of 500 student houses. They will step inside for what they call a general inspection. Is cooperating voluntary? I wonder what happens if the students just don't let them in?