One of the most fundamental societal changes in the Western World in the past two centuries has been the introduction and expansion of a number of large technological systems for transportation, communication, energy and water supply, and sewage and garbage collection. A common characteristic of these infrastructural systems, or infrasystems for short, is that they facilitate movements of different kinds; of people, goods and information. 1 Furthermore, they provide services that are publicly accessible and which fulfil a basic function in society.