The disturbing fact is that no one really knows what is going on in cities because of these technologies. That is to say, there is scant and poorly integrated evidence about how people’s decisions, and the ways those decisions add up to change, are being impacted by the spread of digital technology. Consider transport, which is by far the most quantitative and rigorously understood are of urban research and planning. It is also the area where smart city technologies are currently throwing off the largest amounts of data that cities have ready access to (despite the efforts of companies like Uber to keep these data closely held). But it could be said that our understanding of what is actually happening, how people are traveling and the implications for future transport planning and land use, is actually falling behind. If you don’t believe me, all you have to do is look at the apparently massive negative impact that the presence of digital technology is having on automotive safety. ‘Distracted driving’ is an obvious, inevitable outcome of the spread of engrossing tools and services into cars that are still driven by people with limited attention. Yet we know, collectively, almost nothing about what is actually going on.