Spending time in the heavy traffic emerged in metropolises is an important part of people's daily routine. This situation could turn to an opportunity for a unique type of social communication among people. However, this social communication has its requirements and constraints. In this paper, the idea of an affective ephemeral social network for vehicular scenarios is introduced and the major components of the network architecture including affective individual profile, social matching and social group management are also described. Actually, the idea of matching user's mental model with its affective profile and matching these profiles with each other is accordingly one of the key points of this paper. In this regard, the privacy of the users is also considered and a prototype based on the affective cues has been developed for these concepts. Finally, a user study to investigate the subjective aspects and the user experience of the system is conducted.