Light Goods Freight Defra
[/transport/van/generic/freight/defra]
This category uses the most recent Defra data and advice to calculate emissions from UK large goods road freight. The most accurate way to measure emissions is by fuel use using the Fuel category. But often this data is not available, or, specifically for freight categories, all emissions are not due to the packages being monitored. Therefore, this category allows the user to estimate their greenhouse gas emissions based on the distance travelled and the mass of the freight being transported.
The emission factors used in this category, of kg CO2 per tonne km, were calculated from the emissions factors per vehicle in the Van category and an average load factor of 40% (estimated on the basis of Department for Transport 2005). The average cargo capacity was taken to be 0.6 tonnes for petrol vans up to 1.25 tonnes gross vehicle weight and diesel Class 1 vans, I tonne for Class II diesel vans and taken to be 2 tonnes for vans up to 2.5 tonnes gross vehicle weight.
How to use this category
Use the drill-down fuel to select the type of fuel used from the following options.
- petrol
- diesel
- lpg
- cng
- unknown - for unknown fuel type
Algorithm
CO2eEmissionFactor = CO2EF + N2OEF + CH4EF
kgCO2e = CO2eEmissionFactor * distance * mass
The result is equivalent CO2 emissions, which includes contributions from carbon dioxide, nitrous oxide and methane emissions.