Step 1: Reduce energy consumption from transport networks Transport networks, which represent 74% of the Group’s energy consumption, are a major focus of the energy efficiency plan. As such, basic training for all bus drivers includes energy-efficient driving, which is one way to reduce vehicle energy consumption. Furthermore, rolling stock and driving software systems on automated lines have long factored in energy optimisation goals. In addition, plans to reduce energy consumption from operating RER line A, automated lines and upgraded lines (1, 4, 5, 9, 13 and 14) will enable energy savings of up to 8 GWh per year. Another lever to meet this goal: the system that recovers braking energy from trains, which is already deployed on all RER trains and trams, will be optimised across the network.