I hadn’t realised this was online and picked up on it while skimming the latest from this / inexplicably / styled website from the Arts Council. I’ll let plan b (not that one) explain:

We are making a living portrait of 24 hours in Birmingham with the people who move through its streets, parks, waste grounds and tow paths on foot for the Fierce Festival and the Midlands Art Centre (MAC) See planbperformance.net/?dayinlife.htm for details

A Day in the Life – The Walkers of Birmingham is much more than just a living map, it is a portrait of a city as experienced at ground level. The animation emphasises walking by filtering faster journeys and making these lines more feint