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RATP Group powers up its energy efficiency policy

Published on October 19th 2022

In line with government guidelines as of September 2022, RATP Group has implemented an ambitious action plan to address the energy crisis. Thus, the Group is participating in general efforts to improve energy efficiency. The action plan to increase energy efficiency supplements the Group’s long-term commitments to achieve a more sustainable, energy efficient and frugal city.

RATP Group has signed the EcoWatt charter

On 11 October 2022, the Group signed the EcoWatt charter implemented by RTE and ADEME to manage strains on the electrical network. In the event of increased power outage risks, RTE will broadcast a warning encouraging French citizens and anyone willing to participate to delay their electricity consumption until after consumption peak hours. By signing the charter, RATP Group fully takes into account the extent of the challenge. The Group commits to delaying charging electric buses and service vehicles whenever possible.

RATP Groups also plans to:

  • Switch off all digital advertisement displays in stations during the day in peak consumption periods;
  • Forward the EcoWatt warning to passengers through its various information and communication channels, notably via the Bonjour RATP app;
  • Encourage our employees to adopt eco-friendly habits.

In figures, RATP Group has already reduced

-50% of its energy consumption related to station lighting by becoming the first network in the world to be fully equipped with LED lighting
-16% of its energy consumption on Paris metro line 14 by reprogramming the software that controls the trains
-50% of its greenhouse gas emissions over the 2015-2025 period by carrying out the industrial transition to clean energy for its 25 bus depots in the Île-de-France region: a unique achievement in Europe
8 focus areas in our energy efficiency action plan

1. Reduce energy consumption on transport networks

Since transport networks make up 74% of the Group’s energy consumption, they are one of the major focuses of the energy efficiency action plan. All bus drivers are trained in eco-driving to reduce the vehicle energy consumption, starting from drivers’ initial training. Rolling stock and driving software on automated lines have long integrated energy efficiency objectives.

The economic operation project for automated and renovated lines (metro lines 1, 4, 5, 9, 13 and 14) as well as RER line A has generated significant improvements in energy efficiency, with up to 20GWhs saved per year.
The train braking energy recovery system is another lever that was already implemented across the RER and tramway networks and will soon be deployed across the entire network.

2. Regulate the temperature on commercial and industrial sites

Heating represents 40 to 70% of the energy consumption in commercial and industrial buildings. The energy efficiency action plan aims to accelerate the maintenance programmes that facilitate energy savings. At the same time, a verification campaign is scheduled to check that all the temperature sensors on heating equipment are operational so as to ensure that heating is used only as required.

Furthermore, RATP Group uses a novel geothermal system, notably on metro line 11 where the heat recovered from tunnels covers 35% of the heating needs of a neighbouring building. Another such example: the heat produced by data centres is recovered and used to heat the new Châtillon-Bagneux metro workshop.

3. Optimise ventilation and air conditioning in buildings

RATP Group commits to applying government policies on heating, 19°C in winter and 26°C for air conditioning in summer. The heating guidelines were lowered to 19°C for all housing units managed by RATP Habitat.

The Group also works on optimising the energy consumption in buildings according to occupancy throughout the day by improving heating equipment configuration.

4. Speed up the transition to eco-responsible digital practices

To mitigate the Group’s digital impact, several levers are being harnessed and will be strengthened as part of the energy efficiency action plan.
RATP Group monitors the temperature of its data centres to maintain it at 21°C and has launched a curfew programme for electronic devices left on standby, such as screens and photocopy machines, to reduce their energy consumption. The Group also exhausts opportunities offered by digitalisation to reduce its carbon footprint using innovative solutions.

Thus, since 2020, 115 sites and 369 stations have been connected to the OPEN digital platform, a ground-breaking initiative for the steering of water and energy in stations as well as commercial and industrial sites, developed in partnership with Suez. The system provides better consumption monitoring and optimal responsiveness in the event of irregularities.

5. Reduce lighting

With 10 million LEDs deployed across its network since 2016, RATP became the first network in the world to be fully equipped with LED lighting. The measure has halved energy consumption related to station lighting.

As part of the energy efficiency action plan, RATP Group commits to reducing outside lighting and to fully switching off lighting in buildings during the night.

6. Reduce the impact of light-powered advertisement

The target to reduce energy consumption from advertising displays by 35% between 2022 and 2026 is maintained.
In stations, advertisement displays are switched off between 1 a.m. and 6 a.m. The light intensity of said displays was also reduced to 30%, below the manufacturer standard of 50%.

Moreover, in line with RATP Group’s commitment, in the event of a warning (red EcoWatt alert), all digital advertising displays in stations will be switched off during the day.
In addition to these measures, the Group continues its search for new levers to reduce energy consumption for advertising displays.

7. Optimise work trips

The Group has instructed its employees to take the train for any work trip that is less than 3 hours away, and for any work trip less than 4 hours away in the event of missions that last several days. Furthermore, the Group is trialling the use of an electric cargo bike fleet to replace internal combustion vehicles.

The trial notably concerns work trips related to equipment maintenance.

8. Mobilise all employees

All Group employees are made aware of energy efficiency challenges, notably through the highlighting of eco-friendly habits, a campaign to strengthen the commitment to the energy efficiency policy, climate-themed workshops and webinars on ecological transition challenges.

Employees will also be trained in sustainable digital practices: an e-learning capsule is currently under development for that purpose.

Understand the Group’s consumption

Energy consumption breakdown

Energy consumption breakdown

Our progress
Rolling stock replaced

Upgrading rolling stock, which will be used for several decades, is a powerful lever to reduce energy consumption. New trains on metro line 14 consume 17% less energy than the trains they replace. Similarly, the purchase of new MI20 trains with the support of Île-de-France Mobilités, to be rolled out on RER line B between 2025 and 2030, should lead to a 25% decrease in traction energy consumption.

Using geothermal energy in stations

As part of the metro line 14 extension, heating and temperature regulation needs at Porte de Clichy and Mairie de Saint-Ouen stations are covered by using geothermal energy, through a system drawing the ground’s natural heat. An adjacent housing programme in Paris also benefits from this innovative system which covers 65% of its heating needs.

Heat loops

At rue Beaubourg in Paris, the Paris Habitat social housing provider and RATP, which are both partners in the Paris Climate Plan, have been innovating since 2018 to use heat from the metro line 11 tunnel to cover approximately 35% of a building’s heating needs.

Data centres in Bagneux

Through the sharing of its skills and assets, RATP Group can form synergies to optimise its energy consumption and reduce its impact. In Bagneux, for example, heat from RATP’ data centre is recovered to heat the Chatillon Bagneux metro workshop.

Low-carbon urban cooling network

The Fraîcheur de Paris company, which is co-owned by ENGIE (85%) and RATP Group (15%), has been operating the City of Paris’ cooling network since April 2022. For the next twenty years, it will handle the production, storage, transport and distribution of the city’s cooling energy over a 158 km network. The energy will notably be distributed to offices, housing, museum, hospitals and public service facilities.

Next-generation LEDs

LEDs have been deployed since 2016 on the entire underground station network. The Group became the world’s first transport network fully fitted with LEDs, which has reduced energy consumption by half. This approach is still under way: the installation of 3rd generation LEDs will optimise energy consumption by a further 15%.

New forms of energy

The Group’s goal is to reach a 10% share for renewable energies in its energy mix by 2025. To achieve this, RATP notably signed a first green energy contract with EDF for a 3-year period. Since 1 January 2021, under this contract, EDF has been providing RATP with green electricity. As part of the same approach, a second contract was signed in 2022 with Urbasolar (solar energy) to supply electricity from 2024 to 2029.


All bus drivers are trained in eco-driving as part of their initial training to reduce energy consumption and carbon emissions. The training also applies underground: metro drivers avoid accelerating and maximise energy recuperation when braking.

Illuminated billboards

RATP Group aims to reduce energy consumption from illuminated billboards by 35% between 2022 and 2026.

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