Definition
Air pollutant emissions of all passenger and freight transport modes (exhaust and non-exhaust for PM2.5) in the urban area
Parameter

EHI = Emission harm equivalent index [kg PM2.5 eq./cap per year]
Eeqs = Emission substance type PM2.5 equivalent health impact value [factor]
Eijkcs= Emission of pollutants per vkm driven by transport mode i and vehicle type j for fuel type k, emission class c (g/km)
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]
NEsi = Non-exhaust emissions of pollutant i per distance driven [g/km] (=0 for NOx)
cap = Capita or number of inhabitants in the urban area [#]
k = Energy type (petrol, diesel, bio-fuel, electricity, hydrogen, etc.) [type]
i = Vehicle type 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]
s = Type of substance [type] limited to NOx and PM2.5
c = Emission class (euro norm) [type]
multiplication by 1000 to transform units from g to kg
Data sources
Information needed | Possible specific sources | Costs* | Advice to fill data gaps and/ or improve data quality |
Transport volumes:
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}”.
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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 |
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Vehicle fleet composition per vehicle type for gasoline and diesel per Euro Emission class (%) | |||
Number of inhabitants | The number of inhabitants is usually known. | L | - |
* 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
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