MYC GHG Emissions Calculator

From Communauté de la Fabrique des Mobilités

A tool to quantify urban mobility GHG emissions

Myc emissions calculator 1.2.png


MYC Emissions Calculator is an open source online tool that calculates GHG emissions induced by the transport activity on a given territory (city or country scale).

It relies on the excel-based calculator created by the Institute for Energy and Environmental Research in cooperation with the German and French development agencies GIZ and AFD, for the MobiliseYourCity partnership.

It helps developing countries and cities calculating transport GHG emissions for a "reference year" (when you start the calculation).

In addition, it models a "Business-as-usual scenario (BAU)" : if no actions is taken and considering the expected growth of the population and trips, what can we expect from GHG emissions about 30 years after. That scenario is to be compared with a "climate scenario" with emission reductions from mitigation measures.


FabMob is working on the transformation of the excel-based calculator into the online tool, step by step in order to make it a digital common, easy to access and easy to use for a community.

You can read our first scoping note after analizing the excel-based tool :

To start, FabMob developed a first MVP with some of the excel features :

  • Targeted at consulting firms helping cities (not countries)
  • Focused on GHG estimation for BAU (First sheet, 1A)
  • Focused on passengers (no freight)

We're now working on MVP2 !

Next actions

You can see our next actions on the github project's repository.

Organizations using or interested in using the resource: AFD, Cetud


Tags: international, GHG, cities, countries, Collectivité

Categories: Logiciel, Données, Connaissance, Communauté

Theme: Urbanisme et ville, Logiciel Libre, Collectivité, Africa

Referent: Malou fabmob

Challenge: Accompagner une collectivité à ouvrir un maximum de ressources et construire un kit d'aide à l'innovation, Faciliter le partage la gestion la maintenance la comptabilité des émissions polluantes et de GES des véhicules

Key people to solicit:

Other related common:

Wealth sought:

Required skills:

Community of interest: Communauté des acteurs en Afrique

License: CC BY-NC-SA 4.0

Terms of Service (TOS):

Level of development: POC et 1er client

Link to my actions board:

Link to my cloud, wiki, drive…:


Next step: We're now working on MVP2 !

Documentation of the experimentations:

Other informations

List of the actors using or willing of using this common: aucun pour le moment

List of the workshop reports related to this common:

Complementary information on the project[edit | edit source]

1. GHG emissions calculator[edit | edit source]

The excel-based tool is built around 12 tabs :

  1. Introducing the tool
    • Get started
  2. Filling out the inputs and visualizing the results
    • 1A. Input base and BAU
      Tab 1A Input Base and BAU
    • 1B Top-Down Validation
    • 2A Input Climate Scenario for Passengers
    • 2B Input Climate Scenario for Freight
    • 3. Overview of results
  3. Tabs for intern calculation
    • 4A. Calculation BAU
    • 4B. Calculation Climate Scenario
  4. Complementary data
    • 5. Defaults values
    • 6 Defaults parameters
  5. Sources and abbreviations
  6. Referencing

2. MobiliseYourCity partnership & GHG emissions calculation methodology[edit | edit source]

MobiliseYourCity is an international partnership whose main activity is the development of Sustainable Urban Mobility Plans (SUMP) and National Urban Mobility Policy/Investment Programmes (NUMP). Its methodology is characterised by its very operational aspect (these plans serve as project preparation to raise funds for implementation) and the focus is on data collection, scenario modelling and quantification of impacts on the Sustainable Development Goals.

In the frame of climate-related initiatives funded by donors internationally, one of the main issues is to measure GHG emissions to be able to account for the mitigation impact of the projects. It is the case for instance in many urban mobility-related programmes and projects, of which the MobiliseYourCity (MYC) initiative is an example, where GHG emissions are a major indicator developed according to the MRV (Measure-Report-Verify) approach.

There are several ways to calculate GHG from urban mobility. The ASIF methodology seems to be the most appropriate within the MYC context (where GHG emissions are one key element of the Sustainable Urban Mobility Plan), requiring Vehicles Kilometres Travelled (VKT) and average fuel economy (FE) of each vehicle type.

The ASIF methodology: the most common way to reach MRV for the transport sector[edit | edit source]

The ASIF approach is widely used by many stakeholders to quantify energy use and GHG emissions from the transport sector. The main components are traffic activity (VKT) and GHG emission factors (blue squares in the figure below).

The ASIF framework to calculate GHG emissions from the transport sector (MYC, 2017)

There are three main ways for getting the average fuel economy of the vehicle fleets in cities:

  • Performing a survey towards vehicle users to require their declared fuel economy; such declared values need quite a large sample for each vehicle type considered to get an accurate value;
  • Using an emissions inventory harmonized tool that derives average FE (Fuel Economy) from laboratory measurements on typical driving conditions for each vehicle type;
  • Producing data with specific app like GECO Air or devices.

Each methodological approach have their own advantages and drawbacks (Table 1).

CO2 emission factors from : Pros Cons
Fuel Economy Survey - More realistic value matching local context

- Getting technical information about vehicle fleet simultaneously

- Declared values

- Large sample needed for each vehicle type to get good accuracy

- Timescale to get results

- Surveys are expensive

Emission Inventory Tool - Real CO2 measurements

- Robust "MRV-compatible" methodology

- Allows for future projections for certain tools

- Incentive for all MYC countries/cities to collect the same information

- Pollutants also included

- Comparability across MYC countries/cities

- Requires the technical specifications of the vehicle fleet

- Cost of using the tool when it comes with proprietary rights

- Need of additional information about average speeds or level of congestion

Table 1 : Pros and cons of surveys and IT tool to get CO2 emission factors

This note focuses on the pros and cons of getting fuel economy information by using an emission inventory tool.

Why a harmonized tool ?[edit | edit source]

Using an emission inventory tool to convert VKT into CO2 brings several benefits compared with getting fuel economy values from a survey (see table 1).

There would be a need to be able to gauge and compare the efforts made by each country/city, check the transparency of each results put forward and assess the quality of the efforts made to mitigate GHG emissions.

For example, if a country states 100 MtCO2 saved and another 300 MtCO2 saved, a robust approach requires that the country saving 300 MtCO2 really saved 3 times more than the other country. A harmonized methodological approach would make sure this is possible. If each country develops its own inventory tool to quantify national GHG emissions from the urban transport sector, there is a high risk that the results obtained will not be comparable with the results from other tools. The essence of MRV procedure, making sure that results are harmonized and comparable, would then be missed.

By having a harmonized GHG quantification tool, one would make sure that methodologies and results would be more transparent and more easily comparable. It would also provide a strong incentive to collect the same information in all countries/cities engaged in clean urban transportation strategies and projects, which will be useful to characterize the urban transport sector and calculate GHG emissions.

Hence the recommendation to either adapting an existing tool or creating one adapted to developing countries context. Training would be provided by the tool editor and detailed user guide would be available

Are other tools available?[edit | edit source]

As detailed in ADEME’s report on MRV-GHG strategies for Morocco, a short list of potential tools has been put forward that would fit for these purposes. Such a harmonized GHG tool should build on on the most adequate tools that are widely used across Europe to perform transport emission inventories:

Other institutes like IFEU (Institut für Energie- und Umweltforschung), could also be considered.

GIZ has already delivered a version of HBEFA to perform GHG emission inventories in Chinese cities. A slightly modified version of this tool would potentially be usable within other geographies.

As per COPERT, it is widely used by many stakeholders at the national and local levels, as it is freely available and all emission factors calculation equations are publically available.

Being widely used for emission inventories, such tools would qualify for MRV compatible strategies.

Abbreviations[edit | edit source]

ADEME Agence de l’Environnement et de la Maîtrise de l’Énergie
ASIF Activity Structure Intensity Fuel
CO2 Carbon dioxyde
FE Fuel Economy
GHG Greenhouse gas
MRV Measurement, Reporting and Verification
MRV-GHG Measurement, Reporting and Verification for greenhouse gas
MYC MobiliseYourCity
NAMA Nationally Appropriate Mitigation Action
NUMP National Urban Mobility Planning
SUMP Sustainable Urban Mobility Plan (PDU)
VKT Vehicle kilometres travelled