This chapter provides an overview on existing standards in vehicular networking and highlights new emerging trends towards an integrated infrastructure based on the interworking of heterogeneous technologies. Next-Generation Mobile Vehicular Networks are first characterized by providing an insight on relevant stable standards in wireless communications technologies, with a special focus on Heterogeneous Vehicular Networks. Furthermore, the chapter discusses a general framework supporting opportunistic networking scheme and outlines novel application and use cases based on social- and context-awareness paradigms.