IEA (2015), "Railway Handbook 2015", IEA, Paris https://www.iea.org/reports/railway-handbook-2015
The collaboration of the IEA and the UIC in collecting, elaborating, and presenting activity, energy, and CO2 emissions data was carried out for the fourth time through the release of the Railway Handbook 2015. For this edition, significant methodological improvements were implemented leading to better consistency between the different indicators presented in this Handbook, in addition to updates of the global data, as well as regional breakdowns for those regions that we consider the most relevant from the point of view of transport activity: European Union, USA, Japan, Russia, India, and China. This edition devotes particular attention to the energy efficiency of rail vehicles. This is achieved by providing information on the energy efficiency of trains in different world regions, with a richer set of indicators for the European Union.