Advanced systems to assist drivers and increase road safety and efficiency are developed in recent years using new technologies, such as navigation systems, embedded systems, communication technologies, and web-based applications. However, the implementation of new solutions using these technologies requires concepts based on information and resources sharing and inter-services communication. Sharing information between services allows acquiring more knowledge about the current events on the road that helps participants making appropriate decisions. The paper introduces a service-oriented platform integrating Geofencing techniques for real-time tracking of mobile devises. A prototype was developed and deployed within the EU project ASSET-Road1, and preliminary experiment results are reported to show the feasibility and the impact of this solution on safety and road transport efficiency.