| Summary: | Recently, road freight transportation dominates the freight sector in many countries including Turkey, which is causing a growing concern about environmental and sustainability issues. To develop better policies, road freight emissions have to be determined. Such evaluations are very challenging in the absence of disaggregate commodity flow data, which is the case in Turkey. As a solution, to calculate truck freight transportation emissions a model that combines national level national freight transportation statistics with detailed information collected from roadside axle surveys is proposed. As the roadside axle load surveys are performed on intercity roads, the proposed model can provide emission for intercity truck transportation. Emissions are estimated for the period of 2000 to 2009 using COPERT 4 software. Besides, the level of CO2 emissions is almost same in 2009 and 2000. This amount corresponded to the 25.9% of the national transportation sector emissions in 2009
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