Walking and cycling are the most affordable, climate friendly and inclusive ways to move through cities, yet they remain undervalued. As motorisation rates rise across the globe, the need to protect and expand active mobility has never been greater.

Cable cars reaching the city’s margins, green corridors designed to cool the streets: Medellín is full of ideas for improving urban life. But how transformative have the much-praised projects actually been?

David Amen is a Brazilian graffiti artist, video maker and an art and media educator. Two of his artworks are featured in the D+C February issue.