Something similar has happened to driving. It’s possible to hurtle down a road at 50 miles an hour without thinking at all – until it’s too late. One of the most successful safety design campaigns of recent years aimed to tackle this. The shared space movement puts ambiguity back into road use, for pedestrians and drivers alike. In South Kensington, all street furniture and crossings have been removed and replaced with ambiguous regions where it isn’t clear who has right of way. Drivers and pedestrians snap out of their trances, cars slow down and the accident rate has fallen by 43%.