The present chapter explores the potential contribution of Communities of Interest (CoI) to the commercialization of Intelligent Transport Systems (ITS) products and services. CoI may be local, global or glocal. They refer to networks of people that share a common interest in certain topics or objectives and a common goal to advance these objectives through communication, exchange of ideas and collaboration. This chapter is based on findings of the European Community (EC) FP7 research project entitled ‘Enhancing the transfer of Intelligent Transportation System innovations to the market’ (T-TRANS), coordinated by the Universitat Autònoma de Barcelona, and comprises four sections. The introduction provides the necessary background information as well as a better understanding of CoI. In sections 2, 3 and 4 the landscape of innovative ITS products and services is analysed, and selected case studies and commercialization routes of ITS products and services in Greece are presented. Finally the conclusion discusses the way to accelerate commercialization of state-of-the-art ITS products and services through CoI, including a roadmap for the successful launch of new ITS products and services to potential markets.