Abstract
Autonomous mobility is by many regarded as the ultimate vision for future green transportation, and driverless
operations are therefore pursued for several transportation modes, such as road, rail and water. The scientific and
technological communities within each of these domains do however employ different definitions of autonomy or
automation. And while these definitions to a certain extent describe the functions of the vehicle, train or vessel,
they do not provide any assistance or direction when it comes to designing autonomous systems. This paper aims
to address these shortcomings by suggesting an alternative way of approaching autonomous systems. After
presenting a set of overall requirements for a common framework for autonomous transportation, the paper
introduces the concept of a "digital driver" as a new basis for autonomous mobility. The paper then suggests five
fundamental principles for a digital driver, and describes how these may contribute in the analysis and design of
autonomous mobility systems.