To help readers better understand the motivation for applying different technologies to vehicular social networks (VSNs), a comprehensive overview of current VSNs is presented in this chapter, including the architecture, characteristics, classifications, applications, and importance of VSNs in modern transportation systems. Then, the challenges facing VSNs in terms of resource allocation and vehicle behavior prediction are detailed. Next, the resource management problems for VSNs and methods for solving them, including strategies for communication resource management, computational resource allocation, caching resource management, and multidimensional resource allocation, are surveyed. Finally, the key research problems investigated in this monograph are presented.