As with all journeys, movement is in two directions. Hence, knowing where you are going and where you have come from is important. Avoiding disorientation means using design in both plan and section to steer the passenger towards the journey objective. It also entails using effects of light, material or art to punctuate the journey, especially at critical points such as crossings or changes of angle or level. Architecture here is a matter of designing for cognition rather than simply satisfying functional demands.