Transportation systems analysis, an interdisciplinary area from its fundamental underpinnings, has relied upon assumptions on collective and/or individual desires expressed or satisfied by the mobility of people and goods. Thus, it reflects the need for social connectivity, social behaviour and social integration. Analytical frameworks proposed and used both for social networks, as well as in transportation systems, take advantage of a wide spectrum of modeling approaches. Recent advances in information technology, in particular related with data availability, ubiquitous and multi-channel connectivity provided by new mobile devices and the Internet, people participation in media platforms and the development of specialized communication means (social media, phone-based ‘apps’, public or personalized services, etc.), raise new opportunities and threats that may lead to the transportation sector structural reorganization. After a first wave of social network and transport research, where the “low-hanging fruit” has been mostly picked, we need to start thinking about and moving towards the second generation of social network and transportation systems research, which will benefit from deeper insights and ideally provide superior results.