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Mobility and Transport

Greenhouse gas emissions indicator

Definition

Well-to-wheels GHG emissions by all urban area passenger and freight transport modes

Parameter

ind07-formula.png

G = Greenhouse gas emission [tonnes CO2(eq.) /cap. Per year]
Tk = Tank to wheel CO2 emission per energy type unit considered [kg/ℓ or kg/kWh]
Wk = Well to tank CO2 equivalent emission per energy type unit considered [factor]
Aij= Activity volume (distance driven by transport mode i and vehicle type j) [million vkm per year]
Sijk = Share of fuel type k per vehicle type j and per transport mode i [fraction]
Cijkc = Share of emission class c per fuel type k per vehicle type j and per transport mode i [fraction]
Ijk = Energy intensity per distance driven for vehicle type j and fuel type k [ℓ/km or MJ/km or kWh/km]
Cap = Capita or number of inhabitants in the urban area [#]
Fijk = Non-CO2 GHG correction (CO2 equivalent) [factor]
k = Energy type (petrol, diesel, bio-fuel, electricity, hydrogen, etc.) [type]
i = Transport mode (passenger car, tram, bus, train, motorcycle, inland vessel, freight train, truck, etc.) [type]
j = Vehicle class (if available, specified by model (e.g. SUV, etc.) [type]

multiplication by 1000 to transform unit from kg to tonnes

Data sources

Information needed

Possible specific sources

Costs*

Advice to fill data gaps and/ or improve data quality

Number of inhabitants

The number of inhabitants is usually known.

L

-

Energy content for different fuel types

Default values for energy content are provided.

L

-

Transport volumes:

  • Vehicle-km of passenger vehicles (or Passenger km per mode)

Vehicle-km of freight vehicles (or tkm per mode)

Information on transport volumes should be based on the information provided in the modal split sheet.

M/H

See “ http://ec.europa.eu/transport/node/6530{Modal split as Link}”.

  • Setting-up or updating a transport model or conducting statistically representative surveys are the essential ways to fill in the parameters required.
  • In case data is available in terms of pkm (or tkm), the average occupancy factor (or load factor) can be used to estimate the amount of vkm.
  • In case data on vkm for cars is not available, the estimation from an aggregated modelling tool such as the online model Urban Transport Roadmaps (http://www.urban-transport-roadmaps.eu) could be used; this model provides an estimation of vehicle-km travelled by conventional (diesel and gasoline) cars.
  • Concerning vkm by public transport modes, data is usually available at urban level from public transport authorities/ operators providing the service.
  • Trolley-buses should be categorised as “trams” since they are both electric with similar consumptions.

Fuel consumption by vehicle type by fuel type (and Euro Emission standard for gasoline and diesel) (l/ vkm, Kg/vkm)

Default values for fuel consumption are provided.

L

-

Vehicle fleet composition per vehicle type per fuel type (%)

For vehicle fleet data at country level could be used (if regional or more specific information is not available). Eurostat and ACEA provides information on the fuel types. Other possible sources include national statistics (e.g. national Motor Vehicle Registration Authority) and modelling for Emission Standards.

L/M

  • The indicator spreadsheet is developed with the aim of covering the main vehicles categories. If a vehicle category actually exists but is not covered in the spreadsheet, it is suggested to ignore these vehicles type and recalculate the shares on the remaining types which can be filled in the file (in order to sum up with 100%)​. However, the share of categories not included in the file should be quite small.

Vehicle fleet composition per vehicle type for gasoline and diesel per Euro emission class (%)

L/M

* The column “Costs” provides a qualitative assessment of the budget (staff costs, time, costs for data acquisition, etc.) needed by a city/ urban area for gathering new quantitative data in absence of already available values. For each parameter, the assessment takes into account both the administrative costs and the costs related to searching, acquisition and processing of the needed data; these can be high (“H”), medium (“M”) or low (“L”), or a combination of a pair of them.

Files

Download

To download the indicator spreadsheet, click

sumi_ind07_ghg_emissions_for_dg_move_website.xlsx
English
(142.5 KB - XLSX)
Download

.

Download

To download the indicator spreadsheet, click

sumi_ind07_ghg_emissions_for_dg_move_website.xlsx
English
(142.5 KB - XLSX)
Download

.