"where one or more persons during a certain period drop their relations, their work and leisure activities, and all their other usual motives for movement and action, and let themselves be drawn by the attractions of the terrain and the encounters they find there."
Incorporated within this idea is the theory of psychogeography - a study of the effects of the geographical environment on the emotions and behaviour of the individual. By studying this effect, they hoped to expose the manipulation and control to which everyday urban life is subject. The arbitrariness of the method served to force the participant to become aware of the city's hidden or encoded aspects, turning the mundane into unfamiliar territory.
The dérive also contained a playful element - participants would often deliberately disorientate and confuse themselves to show the concealed potential of experimentation, pleasure and play in everyday life. Methods included requiring the walker to follow a route plotted on a street map of one city superimposed on another, or following a straight line or circle drawn between two random points on the map. It is this playful aspect that I wish to emphasise in my own set of journeys, turning the whole enterprise into a kind of game by which I can navigate the city.

You would think that chance would play a large part in these proceedings, but Debord made some surprising observations about the limitations of chance. He maintained that the action of chance is by nature conservative ie. old habits die hard - even in new situations we revert to habitual actions or choices between a restricted number of variations. Something to bear in mind as I make a choice - left or right at the junction.