such, unable to contribute decisively in road safety as well as in the cost-effectiveness of the research community investments. Furthermore, currently, it is necessary to validate a simulator for a number of research hypotheses, prior to its use, and, afterwards, verify the outcomes emerging from it in real traffic conditions. Thus, instead of being able to exploit the multiple benefits from the-even conditional-use of the simulator (in place of real traffic conditions), the research scope is being transposed to the study of its validity, which, quite often, leads to ambiguous results (and does not allow the direct use of the simulator). This is mainly due to the fact that there is no functional way yet proposed, to calculate the basic analogies of the driving behaviour between the driving simulator and the real traffic conditions (Kendall & Jones, 1999;McGehee et al., 2002). Even the correlation model of Jia et al. ( 2011) (which is utilising the metrics distribution), is useful for the overall comparison of the drivers' performance and, as such, for the evaluation of the overall effects, but not for the prediction of the behaviour of each individual (and new in the sample) driver, since it cannot be known in advance, in which point of the distribution s/he is placed in (i.e. not useful in the driving skills assessment field).According to several researchers, such as Riener ( 2010), in order to be able to use the driving simulator in place of a vehicle in real traffic conditions, it should be ensured that the emerging results will be transferrable to reality. The first proposed solution is the use of high fidelity simulators, which are usually expensive and which still do not necessarily guarantee validity of results (Kappe & Emmerik 2005, Vlakveld 2005). The second proposed solution is the use of a corrective conversion matrix/model, that will provide for each simulator of any level of fidelity the corrective factor for each variable, which, after being applied in the respective simulator results, will approximate as much as possible the corresponding result in the real traffic. The later proposal summarises the objective of the current dissertation, which aims to investigate the existence of an a priori correlation of driving performance between (each specific) driving simulator and real traffic conditions, regardless of the particular research hypotheses, and, in case this exists, the identification of an algorithm for transformation of simulator data to real traffic ones.