Using modern advanced driving simulator for human factors research has many advantages such as experimental control, expense, safety, and ease of data collection. However, the literature describes some possible disadvantages, i.e. simulator sickness, inaccurate replication of physical sensations, and most importantly, validity, which is the extent to which human behavior observed in simulation conditions, can be generalized to real situations. In other words, whereas physical validity is improving, psychological and behavioral validity remains a difficult problem. Assessing the absolute validity of driving simulation would require the comparison of results obtained from studies conducted in a real situation and in a virtual environment. However, this comparison is expensive (instrumentation) and complex, if possible (strict control of all the events occurring in a real situation). One way to deal with this problem is to focus on relative behavioral validity, trying to evaluate to what extent human behavior observed in simulation conditions is qualitatively similar to a “real world” behavior. A correlative approach is to try to measure, by manipulating experimental conditions, to what extent this behavior is modified, with reference to a “real world” behavior. This is typically what the concept of presence, introduced in virtual reality research to describe psychological and behavioral effects of immersive virtual environments, tries to achieve.