In Brazil, 40% of sidewalks don;t fill legal width requirement. And in a country where chilling outside bars is a strong culture, a smaller sidewalk means fewer customers for small bar owners. So we decided to solve it using...algorithms. We created a hack to fool navigation apps and diverts cars from the streets of bars with tiny sidewalks, leaving it free and safer for bar goers, and opening more space for bar owners. The trick? A bike with 100 phones reporting "blocked road" simultaneously.