Road users are changing their behaviour based on what their satnavs tell them, but the implications are not yet being recognised by those responsible for planning and operating the network.
From its beginnings in the early days of the last decade, Uber was clear about its plans for long-term disruption to the transport system - and of a willingness for self-disruption too.
How will the economy adapt as work is increasingly done by machines?
Some of the worst mistakes in transport investment have been supported by huge volumes of forecasts, surveys and studies, confidently published with little recognition of their inconsistencies and errors.