I gruppi di interesse nei trasporti

This article contributes to the study of interest group focusing on transport policy. After a short description of groups' evolution over time, the article tries to assess the influence of these organizations on the whole policy. To do so, it looks both at structural and behavioural features. Among the former, membership, number of offices, employees and revenues are considered. These indicators provide an idea of the amount of organizational resources at disposal of each group. Furthermore, groups' strategies are considered, with attention to direct and indirect modes of mobilization. Finally, three law-making processes in the field of transport have been described. The three narratives aim at singling out groups' resources and strategies in action, and to assess their influence on actual policy making.