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.
Step 2: Regulate temperature in industrial and office buildings As heating accounts for 40% to 70% of the energy consumption from industrial and office buildings, the energy efficiency plan intends to accelerate maintenance programmes that would enable energy savings. At the same time, a campaign will be launched to check the working condition of temperature sensors on heating systems. The goal of the campaign is to guarantee that the amount of heating used closely matches the amount required. The Group has also been innovating with geothermal energy systems, notably on metro line 11. Heat from the line’s metro tunnels is recovered to meet 35% of a building’s heating requirements. Another innovation: heat generated from the Bagneux data centre will be recovered to heat the future metro line 13 maintenance workshop (Châtillon-Bagneux), set to be completed in 2026.
Step 3: Optimise ventilation and air conditioning in buildings RATP Group undertakes to apply guidelines to cap heating at 19°C in the winter and air conditioning at 26°C in the summer. As a result, the heating temperature setting has been lowered to 19°C across the entire pool of RATP Habitat-managed housing units. The Group also focuses on the optimisation of energy consumption based on building occupancy, by improving the configuration of heating systems.
Step 4: Drive responsible digital habits The Group uses several levers to limit the impact of its digital technology use, and will further rely on them as part of the energy efficiency plan.Air conditioning in data centres and server rooms has been reduced, depending on the size of the server farms hosted (between 21°C and 24°C). Our equipment (computers, screens in office buildings and stations, servers and more) automatically switches to standby mode when it is not in use. Other initiatives will follow, notably the inclusion of CSR criteria and eco-design in the Group’s purchases and IT projects, demonstrating how digital technology enhances the Group’s energy efficiency. Since 2020, 115 sites and 369 train and metro stations have been connected to the OPEN digital platform, a new system that manages water and energy in stations, industrial buildings and office buildings. OPEN was developed in collaboration with Suez. The system makes it possible to monitor consumption more efficiently and respond quickly in the event of an anomaly.
Step 5: Reduce the amount of lighting With 10 million LEDs deployed across the network, in 2016, RATP became the first network in the world to be fully equipped with LEDs. Since then, energy consumption from station lighting has been halved.As part of the energy efficiency plan, RATP Group has pledged to reduce outdoor lighting and to switch off all lights in buildings at night.
Step 6: Reduce the impact of illuminated advertising The goal that has been set for illuminated advertising panels to consume 35% less energy between 2022 and 2026 remains.Digital advertising display screens in metro and train stations are switched off between 1 a.m. and 6 a.m. In addition, the brightness of all screens was also reduced to 30%, below the manufacturer standard of 50%. Furthermore, in line with the Group’s commitment, when an alert (red Ecowatt signal) is raised, all digital advertising display screens in metro and train stations will be switched off during the daytime. To supplement these measures, the Group continues to identify new levers to reduce the energy consumption of advertising media.
Step 7: Optimise business travel The Group has instructed its employees to travel by train for all business appointments lasting fewer than 3 hours. The same guideline applies to all journeys that last fewer than 4 hours in missions that exceed one working day. In addition, the Group is currently providing a fleet of electrically assisted cargo bikes on a trial basis, to replace combustion engine vehicles. This trial notably targets business travel for the purpose of equipment maintenance.
Step 8: Mobilise all employees All Group employees have been made aware of the challenges involved in ensuring energy efficiency. Awareness efforts include the promotion of eco-friendly habits, campaigns to increase commitment to the energy efficiency plan, climate workshops (Fresques du climat) and webinars on ecological transition issues.In addition, employees will soon be trained in the best practices with regard to eco-responsible digital habits. An e-learning capsule on the topic is currently being developed.
