ADEME passenger transport emission factors

Compare a selection of ADEME passenger transport emission factors for road, rail, air and maritime travel.

City bus - Parallel hybrid powertrain

0.0743kgCO2e/passenger.km

Source :E4T study, ADEME - IFPEN

City bus - Series hybrid powertrain

0.0711kgCO2e/passenger.km

Source :E4T study, ADEME - IFPEN

City bus - Electric

0.0217kgCO2e/passenger.km

Source :E4T study, ADEME - IFPEN

City bus - NGV

0.122kgCO2e/passenger.km

Source :HBEFA

City bus - Diesel

0.122kgCO2e/passenger.km

City bus - average - Urban area, < 100 000 inhabitants

0.202kgCO2e/passenger.km

Source :UTP - TCU survey 2017

City bus - average - Urban area, 100 000 to 250 000 inhabitants

0.147kgCO2e/passenger.km

Source :UTP - TCU survey 2017

City bus - average - Urban area, > 250 000 inhabitants

0.151kgCO2e/passenger.km

Source :UTP - TCU survey 2017

Coach - Diesel

0.0376kgCO2e/passenger.km

Passenger aircraft - 101-220 seats, 1000-2000 kms, 2023 - WITH contrails

0.185kgCO2e/passenger.km

Passenger aircraft - 101-220 seats, 1000-2000 kms, 2023 - WITHOUT contrails

0.102kgCO2e/passenger.km

Passenger aircraft - 101-220 seats, 500-1000 kms, 2023 - WITH contrails

0.225kgCO2e/passenger.km

Passenger aircraft - 101-220 seats, 500-1000 kms, 2023 - WITHOUT contrails

0.124kgCO2e/passenger.km

Passenger aircraft - 101-220 seats, <500 kms jet, 2023 - WITH contrails

0.289kgCO2e/passenger.km

Passenger aircraft - 101-220 seats, <500 kms jet, 2023 - WITHOUT contrails

0.159kgCO2e/passenger.km

Passenger aircraft - 101-220 seats, 2000-5000 kms, 2023 - WITH contrails

0.167kgCO2e/passenger.km

Passenger aircraft - 101-220 seats, 2000-5000 kms, 2023 - WITHOUT contrails

0.0918kgCO2e/passenger.km

Passenger aircraft - 101-220 seats, >5000 kms, 2023 - WITH contrails

0.178kgCO2e/passenger.km

Passenger aircraft - 101-220 seats, >5000 kms, 2023 - WITHOUT contrails

0.0979kgCO2e/passenger.km

Passenger aircraft - 20-50 seats, 1000-2000 kms, 2023 - WITH contrails

0.604kgCO2e/passenger.km

Passenger aircraft - 20-50 seats, 1000-2000 kms, 2023 - WITHOUT contrails

0.332kgCO2e/passenger.km

Passenger aircraft - 20-50 seats, 500-1000 kms, 2023 - WITH contrails

0.471kgCO2e/passenger.km

Passenger aircraft - 20-50 seats, 500-1000 kms, 2023 - WITHOUT contrails

0.259kgCO2e/passenger.km

Passenger aircraft - 20-50 seats, <500 kms jet, 2023 - WITH contrails

0.647kgCO2e/passenger.km

Passenger aircraft - 20-50 seats, <500 kms jet, 2023 - WITHOUT contrails

0.356kgCO2e/passenger.km

Passenger aircraft - 20-50 seats, <500 kms turboprop, 2023 - WITH contrails

0.465kgCO2e/passenger.km

Passenger aircraft - 20-50 seats, <500 kms turboprop, 2023 - WITHOUT contrails

0.256kgCO2e/passenger.km

Passenger aircraft - 51-100 seats, 1000-2000 kms, 2023 - WITH contrails

0.258kgCO2e/passenger.km

Passenger aircraft - 51-100 seats, 1000-2000 kms, 2023 - WITHOUT contrails

0.143kgCO2e/passenger.km

Passenger aircraft - 51-100 seats, 500-1000 kms, 2023 - WITH contrails

0.307kgCO2e/passenger.km

Passenger aircraft - 51-100 seats, 500-1000 kms, 2023 - WITHOUT contrails

0.169kgCO2e/passenger.km

Passenger aircraft - 51-100 seats, <500 kms jet, 2023 - WITH contrails

0.424kgCO2e/passenger.km

Passenger aircraft - 51-100 seats, <500 kms jet, 2023 - WITHOUT contrails

0.233kgCO2e/passenger.km

Passenger aircraft - 51-100 seats, <500 kms turboprop, 2023 - WITH contrails

0.253kgCO2e/passenger.km

Passenger aircraft - 51-100 seats, <500 kms turboprop, 2023 - WITHOUT contrails

0.139kgCO2e/passenger.km

Passenger aircraft - >220 seats, 500-1000 kms, 2023 - WITH contrails

0.331kgCO2e/passenger.km

Passenger aircraft - >220 seats, 500-1000 kms, 2023 - WITHOUT contrails

0.182kgCO2e/passenger.km

Passenger aircraft - >220 seats, 1000-2000 kms, 2023 - WITH contrails

0.236kgCO2e/passenger.km

Passenger aircraft - >220 seats, 1000-2000 kms, 2023 - WITHOUT contrails

0.13kgCO2e/passenger.km

Passenger aircraft - >220 seats, 2000-5000 kms, 2023 - WITH contrails

0.169kgCO2e/passenger.km

Passenger aircraft - >220 seats, 2000-5000 kms, 2023 - WITHOUT contrails

0.0931kgCO2e/passenger.km

Passenger aircraft - >220 seats, >5000 kms, 2023 - WITH contrails

0.151kgCO2e/passenger.km

Passenger aircraft - >220 seats, >5000 kms, 2023 - WITHOUT contrails

0.0832kgCO2e/passenger.km

Scooter (combustion) - Mixed - 2023

0.0851kgCO2e/km

Scooter (combustion) - Rural - 2023

0.0851kgCO2e/km

Scooter (combustion) - Urban - 2023

0.0851kgCO2e/km

Hoverboard

0.966kgCO2e/hour

Source :ADEME. J.Lhotellier RDC Environment. Décembre 2019. Modélisation et évaluation environnementale de p

Mainline train - 2021

0.00991kgCO2e/passenger.km

Source :RATP - SNCF

Mainline train - 2022

0.0075kgCO2e/passenger.km

Source :RATP - SNCF

Motorcycle =< 250 cm3 - Mixed - 2023

0.087kgCO2e/km

Motorcycle =< 250 cm3 - Rural - 2023

0.0895kgCO2e/km

Motorcycle =< 250 cm3 - Urban - 2023

0.0832kgCO2e/km

Motorcycle > 250 cm3 - Mixed - 2023

0.217kgCO2e/km

Motorcycle > 250 cm3 - Rural - 2023

0.201kgCO2e/km

Motorcycle > 250 cm3 - Urban - 2023

0.219kgCO2e/km

Subway - 2019 - Ile de France

0.00274kgCO2e/passenger.km

Source :RATP - SNCF

Subway - 2018 - Ile de France

0.00284kgCO2e/passenger.km

Source :RATP - SNCF

Subway - 2021 - Ile de France

0.00404kgCO2e/passenger.km

Source :RATP - SNCF

Subway - 2022 - Ile de France

0.00444kgCO2e/passenger.km

Source :RATP - SNCF

Subway - 2022 - Ile de France

0.00442kgCO2e/passenger.km

Subway, tram, trolley bus - 2018 - Urban area, 100 000 to 250 000 inhabitants

0.00503kgCO2e/passenger.km

Source :UTP - TCU survey 2017

Subway, tram, trolley bus - 2018 - Urban area, > 250 000 inhabitants

0.00329kgCO2e/passenger.km

Source :UTP - TCU survey 2017

River shuttle - Data 2009

0.0643kgCO2e/passenger.km

Source :Bilan Carbone historical data

Inter-island shuttle - Polynesia

0.229kgCO2e/passenger.km

Source :ADEME analysis

Inter-island shuttle - Mayotte-Anjouan

0.384kgCO2e/passenger.km

Source :ADEME analysis

Inter-island shuttle - Petite Terre-Grande Terre

0.31kgCO2e/passenger.km

Source :ADEME analysis

RER (Paris area) and Transilien (suburban-train lines) - 2019 - Ile de France

0.00728kgCO2e/passenger.km

Source :RATP - SNCF

RER (Paris area) and Transilien (suburban-train lines) - 2018 - Ile de France

0.00768kgCO2e/passenger.km

Source :RATP - SNCF

RER (Paris area) and Transilien (suburban-train lines) - 2021 - Ile de France

0.00938kgCO2e/passenger.km

Source :RATP - SNCF

RER (Paris area) and Transilien (suburban-train lines) - 2022 - Ile de France

0.00978kgCO2e/passenger.km

Source :RATP - SNCF

Regional Train - 2019 - Mixed traction

0.0296kgCO2e/passenger.km

Source :InfoGES SNCF

Regional Train - 2018 - Mixed traction

0.0313kgCO2e/passenger.km

Source :InfoGES SNCF

Regional Train - 2021 - Mixed traction

0.0317kgCO2e/passenger.km

Source :InfoGES SNCF

Regional Train - 2022 - Mixed traction

0.0277kgCO2e/passenger.km

Source :InfoGES SNCF

High Speed Train - 2019

0.00236kgCO2e/passenger.km

Source :InfoGES SNCF

High Speed Train - 2018

0.00253kgCO2e/passenger.km

Source :InfoGES SNCF

High Speed Train - 2021

0.00334kgCO2e/passenger.km

Source :InfoGES SNCF

High Speed Train - 2022

0.00293kgCO2e/passenger.km

Source :InfoGES SNCF

Train (passengers)

0.192kgCO2e/passenger.km

Train (passengers)

0.187kgCO2e/passenger.km

Train (passengers)

0.0668kgCO2e/passenger.km

Train (passengers)

0.0235kgCO2e/passenger.km

Train (passengers)

0.0484kgCO2e/passenger.km

Train (passengers)

0.114kgCO2e/passenger.km

Train (passengers)

0.0514kgCO2e/passenger.km

Train (passengers)

0.0452kgCO2e/passenger.km

Train (passengers)

0.0662kgCO2e/passenger.km

Train (passengers)

0.0388kgCO2e/passenger.km

Train (passengers)

0.0317kgCO2e/passenger.km

Train (passengers)

0.0397kgCO2e/passenger.km

Train (passengers)

0.04kgCO2e/passenger.km

Train (passengers)

0.0763kgCO2e/passenger.km

Train (passengers)

0.0615kgCO2e/passenger.km

Train (passengers)

0.075kgCO2e/passenger.km

Train (passengers)

0.0129kgCO2e/passenger.km

Train (passengers)

0.00374kgCO2e/passenger.km

Mainline train - 2019

0.00592kgCO2e/passenger.km

Source :InfoGES SNCF

Mainline train - 2018

0.00633kgCO2e/passenger.km

Source :InfoGES SNCF

Tram - 2019 - Ile de France

0.00268kgCO2e/passenger.km

Source :RATP - SNCF

Tram - 2018 - Ile de France

0.00278kgCO2e/passenger.km

Source :RATP - SNCF

Tram - 2021 - Ile de France

0.00388kgCO2e/passenger.km

Source :RATP - SNCF

Tram - 2022 - Ile de France

0.00428kgCO2e/passenger.km

Source :RATP - SNCF

Tram - 2022 - Ile de France

0.00421kgCO2e/passenger.km

Cable car - 2010

0.118kgCO2e/km

Source :Bilan Carbone historical data

Cable car - 2010

0.0295kgCO2e/passenger.km

Source :Bilan Carbone historical data

Passenger car - E85 engine - 2023

0.174kgCO2e/km

Passenger car - Gasoline engine - 2023

0.357kgCO2e/km

Passenger car - Diesel engine - 2023

0.19kgCO2e/km

Passenger car - NGV engine - 2023

0.249kgCO2e/km

Passenger car - LPG engine - 2023

0.224kgCO2e/km

Passenger car - Average motorisation - 2023

0.256kgCO2e/km

E85-powered car - Short-distance - 2023

0.125kgCO2e/passenger.km

E85-powered car - Long-distance - 2023

0.0817kgCO2e/passenger.km

E85-powered car - Mixed - 2023

0.109kgCO2e/passenger.km

NGV-powered car - Short-distance - 2023

0.176kgCO2e/passenger.km

NGV-powered car - Long-distance - 2023

0.118kgCO2e/passenger.km

NGV-powered car - Mixed - 2023

0.155kgCO2e/passenger.km

LPG-powered car - Short-distance - 2023

0.164kgCO2e/passenger.km

LPG-powered car - Long-distance - 2023

0.103kgCO2e/passenger.km

LPG-powered car - Mixed - 2023

0.14kgCO2e/passenger.km

Gasoline-powered car - Short-distance - 2023

0.25kgCO2e/passenger.km

Gasoline-powered car - Long-distance - 2023

0.223kgCO2e/passenger.km

Gasoline-powered car - Mixed - 2023

0.238kgCO2e/passenger.km

Diesel-powered car - Short-distance - 2023

0.175kgCO2e/passenger.km

Diesel-powered car - Long-distance - 2023

0.11kgCO2e/passenger.km

Diesel-powered car - Mixed - 2023

0.119kgCO2e/passenger.km

Passenger car - average - Short-distance - 2023

0.203kgCO2e/passenger.km

Passenger car - average - Long-distance - 2023

0.159kgCO2e/passenger.km

Passenger car - average - Mixed - 2023

0.16kgCO2e/passenger.km

Car - Compact vehicle (segment C) - Electric

0.103kgCO2e/km

Source :IFPEN

Car - Compact vehicle (segment C) - Full hybrid P2

0.183kgCO2e/km

Source :IFPEN

Car - Compact vehicle (segment C) - Full hybrid Prius

0.147kgCO2e/km

Source :IFPEN

Car - Compact vehicle (segment C) - Mild Hybrid fuel (diesel)

0.217kgCO2e/km

Source :IFPEN

Car - Compact vehicle (segment C) - Mild Hybrid fuel (gasoline)

0.232kgCO2e/km

Source :IFPEN

Car - Compact vehicle (segment C) - Plug in-hybrid - P2/prius

0.0733kgCO2e/km

Source :IFPEN

Car - Light vehicle (Segment A) - Electric

0.0953kgCO2e/km

Source :IFPEN

Car - Light vehicle (Segment A) - Mild Hybrid fuel

0.171kgCO2e/km

Source :IFPEN

Car - Light vehicle (Segment A) - Plug-in hybrid with auxiliary power unit

0.0718kgCO2e/km

Source :IFPEN

Car - Sedan car - Electric

0.139kgCO2e/km

Source :IFPEN

Car - Sedan car - Full hybrid P2

0.255kgCO2e/km

Source :IFPEN

Car - Sedan car - Full hybrid Prius

0.207kgCO2e/km

Source :IFPEN

Car - Sedan car - Mild Hybrid fuel (diesel)

0.277kgCO2e/km

Source :IFPEN

Car - Sedan car - Mild Hybrid fuel (gasoline)

0.348kgCO2e/km

Source :IFPEN

Car - Sedan car - Plug in-hybrid - P2/prius

0.102kgCO2e/km

Source :IFPEN

Private car - Sedan car - Hydrogen SMR centralized natural gas

0.216kgCO2e/km

Private car - Sedan - Centralized hydrogen SMR biomethane

0.125kgCO2e/km

Private car - Sedan - Hydrogen decentralized electrolysis mix France

0.081kgCO2e/km

Private car - Sedan car - Hydrogen decentralized electrolysis EU

0.258kgCO2e/km

Private car - Sedan car - Hydrogen decentralized electrolysis renewable energy mix

0.072kgCO2e/km

Bike - electrically assisted

0.011kgCO2e/km

Source :ADEME. J.Lhotellier RDC Environment. Décembre 2019. Modélisation et évaluation environnementale de p

Scooter - electric

0.0249kgCO2e/km

Source :ADEME. J.Lhotellier RDC Environment. Décembre 2019. Modélisation et évaluation environnementale de p

Understand the category

What do passenger transport factors compare?

Passenger transport factors compare road, rail, air and maritime travel using units such as passenger-kilometres or journeys. Vehicle type, occupancy, distance and service class can materially affect the result.

Choose the right factor

How should a passenger transport factor be selected?

  1. Identify the actual mode, vehicle or service used.
  2. Check whether the activity is expressed per passenger-kilometre, vehicle-kilometre or trip.
  3. Use the closest available assumptions for occupancy, distance and energy source.
Frequently asked questions

Questions about passenger transport factors

What is a passenger-kilometre?

It represents one passenger transported over one kilometre and allows different transport modes to be compared on a consistent basis.

Does vehicle occupancy matter?

Yes. Emissions allocated to each passenger generally decrease when more passengers share the same vehicle.

Can a generic air travel factor be used for every flight?

Prefer a factor matching the distance class and scope of the journey, and check whether non-CO2 effects are included.

Data source : ADEME — Base Carbone® v23.6, updated on 3 July 2025. Data reused under Licence Ouverte / Open Licence 2.0.Independent tool developed by IFC.D, without validation or endorsement by ADEME.

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