Christos N. Pyrgidis is a professor in railway engineering at the Aristotle University of Thessaloniki (AUTh), Greece. He earned a diploma in civil engineering (AUTh, 1981). He specialised for five years at the Ecole Nationale des Ponts et Chaussées, Paris, France, in transportation infrastructure (CES), transport economics (DEA), and railway engineering (PhD). From 2004 - 2007, he served as the Greek representative to the Administrative Board of the European Railway Agency. Since 2014 he has been a member of the Scientific Committee of SHIFT2RAIL.

1. The railway as a transport system. 2. Loads on track. 3. Behaviour of rolling stock on track. 4. Tramway. 5. Metro. 6. Monorail. 7. Automatic passenger transport railway systems of low- and medium-transport capacity. 8. Suburban railway. 9. Rack railway. 10. Cable railway systems for steep gradients. 11. Organisation and management of passenger intercity railway transport. 12. High-speed networks and trains. 13. Tilting trains. 14. Metric track gauge intercity railway networks. 15. Organisation and management of freight railway transport. 16. Heavy haul rail transport. 17. Operation of railway systems under specific weather conditions and natural phenomena. 18. Railway safety. 19. Railway and the natural environment. 20. The research in the railway domain - Cutting-edge technologies in railways. 21. Applicability verification - A supporting tool for the conduction of feasibility studies of urban mass railway transportation systems.