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Definition of the CO2 footprint

The CO2 footprint quantifies the amount of carbon dioxide (CO2) released as a result of an activity, product, delivery or service that causes fossil fuels to be burned. In terms of products, this information has been available for a few years for home appliances, real estate and vehicles. 

By informing you of your journey's CO2 emissions, we're giving you the choice of selecting the most environmentally friendly mode of transport and thus contributing to the fight against climate change.

Calculation method 

 
Your journey's CO2 footprint is calculated as follows:

Distance of your trip x a traveller's CO2 emission per kilometre for this type of train

When a trip requires the use of several types of train (for example, at the start of the journey you take a TGV train and then continue your journey by switching to a TER train), your trip's CO2 emissions are the total CO2 emissions of your trip for all the trains used.

A traveller's CO2 emissions when travelling one kilometre broken down by SNCF train type (2015 data based on energy consumption and 2014 train use statistics):

  • TGV train: 3.2 g of CO2 per kilometre
  • Intercity train: 11.8 g of CO2 per kilometre
  • TER train: 29.2 g of CO2 per kilometre
  • Transilien train: 6.4 g of CO2 per kilometre


A traveller's CO2 emissions based on their travelling one kilometre, broken down by SNCF international train type (2015 data based on energy consumption and 2014 train use statistics): 

  • Thalys train: 11.6 g of CO2 per kilometre
  • Eurostar Train: 11.2 g of CO2 per kilometre
  • Elipsos train: 27 g of CO2 per kilometre
  • Gala train: 12 g of CO2 per kilometre
  • Alleo train: 11.3 g of CO2 per kilometre


Sources: Actual train use statistics and electrical consumption of each carrier for 2012;
Emissions factor of electricity for transport purposes ""France"" (53 g of CO2/kWh) for kilometres
travelled in France
Emissions factor of electricity used for ''Europe'' transport purposes (420 g of CO2/kWh) or emissions factor of rail electricity in the countries in question, were passed on by traction electricity suppliers, for kilometres travelled in other countries.

A traveller's CO2 emissions based on travelling one kilometre broken down by urban RATP mode of transport (2015 data based on 2014 energy consumption and transport use statistics) 
 
  • Metro: 3.8 g of CO2/km
  • Tram: 3.1 g of CO2/km
  • Bus: 94.7 g of CO2/km


CO2 emissions based on travelling one kilometre by road (based on 2012 fuel consumption and transport use statistics)

  • OUIBUS: 22.8 g of CO2/km

 
Average emissions of other modes of transport for a passenger per kilometre.
 
  • Private cars in France: 205 g of CO2/km


source: Average use of private vehicles in France: Sustainable Development and Energy Ministry - Observation and Statistics Department (SOeS) Average consumption of passenger vehicles in France and fuel emissions factors: ADEME – Carbon Base

Use of cars in km: 68% diesel and 32% petrol; consumption: 6.6L/100 km for diesel and 7.8L/100 km for petrol; emissions factors: 3.07 kg of CO2/L for diesel and 2.71 kg of CO2/L for petrol

  • Intercity buses: 171 g of CO2/km

Source: Sustainable Development and Energy Ministry ""CO2 Information on Transport Services - Methodological Guide'', 2012

  • Domestic flights: 168 g of CO2/km

Source: Sustainable Development and Energy Ministry ""CO2 Information on Transport Services - Methodological Guide'', 2012 – For a 150-seater aeroplane making a flight shorter than 1000 km.


Where can this information be found, and for what type of train?

OUI.sncf provides you with CO2 information when finalising your booking, before you validate your shopping cart, for TGV, INTERCITÉS and OUIGO trains for all journeys in France and abroad.

MAJ le 11 mai 2018 à 11:26

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