JJR holds a Doctorate in Physics from the University of Cantabria (Spain). He was a post-doctoral researcher at the University of Porto and Emory University (Atlanta, USA), a research fellow at the ISI Foundation (Turin, Italy) and is now a Lead Scientist at the Spanish National Scientific Research Council (CSIC) in partnership with the Institute for Cross-Disciplinary Physics and Complex Systems (CSIC-UIB) in Palma. JJR is Coordinator of the PTI Mobility 2030 for the CSIC and has written over 100 scientific articles on complex networks, mobility, transport systems and urban systems.