This document discusses how technology will change transportation and cities. It argues that self-driving cars will drastically reduce the cost per kilometer driven, leading to more driving without humans. This could disrupt transportation by creating a new interoperable system where private cars and fleets are part of a shared network. It suggests that private car ownership may disappear as driving becomes more like a sport, and that mobility will be provided by businesses as part of their models. The document also discusses how these changes could lead to new approaches to urban design if people are no longer constrained by commutes.