The aim of this paper is to outline the basic concepts of an object-oriented microscopic traffic simulator under developtment by us, and report the preliminary results. The motivation behind the developtment of such a simulator is the incrasing utilisation of microscopic simulators based on cellular Automata. We propose an object-oriented version, integrated with database and visualisation capability, this facilitating its usage by technicians of the traffic simulation branch. We focus on the class desing, and especially on the driver class, which is integrated in the proposed framework. We then compare our implementation with previous ones at the conceptual level, showing that the object-oriented paradigm permits an easy change of specification of the model driver, without having to rewrite significat parts of code.