A hierarchical approach to design a V2V intersection assistance system

The key challenge in enhancing intersection safety is to identify vehicles that have a high potential to be involved in a collision as early as possible and take preventive action thereof. Such a system design and implementation needs an analysis phase during which the system is analyzed and decomposed. Given that most large-scale complex engineering systems need to be simplified and layered before being designed, a hierarchical approach is necessary to ensure a global and structured understanding of the whole system, including involved stakeholders, use cases and associated requirements. Despite the fact that use cases in themselves are quite intuitive, the process around them is a much bigger challenge since it usually varies from one situation to another. In this paper we analyze and model a cooperative intersection safety system using a hierarchical method to represent use cases. This approach simplifies the understanding of the intersection crossing problem by applying transformations that reduce its complexity. We also show that we get a first functional architecture of the system based on the use cases analysis.