Abstract
Moving around in traffic with a vehicle or as a pedestrian requires an enormous amount of visual information to be processed. Accident analyses stipulate the role of human perceptual errors. The qualitative aspects of this type of error besides a normative analysis of `vision in driving' are used to formulate the requirements for a comprehensive theory of seeing during driving. The theory concentrates on the internal, mental representation of the driving environment while an attempt is made to formalize the process of learning by experience. Finally the theory is applied to practical traffic research issues in which the faculty of seeing is dominant. (A)