ABSTRACT
Since the beginning of motorisation, the rate between passenger cars to 1000 inhabitants (motorisation rate) has represented a significant socio-economic and productive development-index of a country. In the 70 s it was shown that the trend of the motorisation rate could be well represented by sigmoid functions. This study aims to present an analysis of the analytical expressions of the motorisation rate trend in Italy. In the current continental framework, Italy is one of the country with the greatest motorisation rate but also a country for which the interpretation of this simple statistical parameter necessarily requires a deepening. The motorisation rate is still well fitted by sigmoid function but with a gap between Northern and Southern Italy due to an infrastructure delay, highly noticeable in Southern Italy, but especially to a different management policy of the public transport and the related infrastructure investments.
