Urban Mobility Index
An ML experiment predicting walkability from bus-stop and intersection densities across 774 neighborhoods in nine cities - and an honest account of where it works (the cities it trained on) and where it doesn't (the ones it hasn't seen).
Pedestrian Activity & San Francisco's Hills
Do San Francisco's steep blocks (≥20% grade) keep people from walking through them? We expected the hills to act as walls. The data pushed back: nearly a third of recorded trips crossed 'significant' slopes, and half of running trips did.