Social distancing and '1.5 metres' are concepts we have been confronted with every day in the past year. Although it is of vital importance to follow the rules, it can be difficult at times to get a feel for what 1.5 metres looks like. This is why Maarten Sukel, a PhD student at the Amsterdam Business School (ABS) and AI lead at the municipality of Amsterdam, and his team developed the 1.5 metre monitor: a camera that shows how closely people observe the required distance. 'It's quite a simple technique that works on the basis of machine learning.'