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The following links help navigate the LIPASTO unit emission general description and mode-specific methodology descriptions.
On LIPASTO traffic emission pages the term unit emissions refers to emissions resulting from vehicles while being used. Emissions are allocated to the transport of a transport unit over one kilometre, for example grams per passenger kilometre (g/pkm) or grams per tonne kilometre (g/tkm). On these pages the transport unit in passenger traffic is one passenger and in freight traffic it can be the entire vehicle, one container or trailer but most usually one tonne of freight.
While a vehicle is being used, energy consumption equals fuel consumption that is measured in mass (g), volume (l) and energy (MJ) units. Unit emissions cover the emissions resulting from fuel combustion, measured in mass units. Electric vehicles and trains are an exeption, because electric engine causes no emissions during the use phase. However, the emissions released from the electricity production can be calculated using life cycle approach.
The compounds under examination are carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), particle matter (PM), methane (CH4), nitrous oxide (N2O), sulphur dioxide (SO2) and carbon dioxide (CO2). In addition, a value for carbon dioxide equivalent (CO2e) is calculated, combining the warming effects of carbon dioxide, methane and nitrous oxide.
LIPASTO traffic emissions pages published in 2017 include tabled unit emissions for road, railway, waterborne and air traffic in Finland in 2016. The results are presented separately for passenger and freight traffic. The results represent the situation in Finland, acknowledging the transport equipment used and the actual amounts of passengers and freight transported.