Estimation of road freight transportation emissions in Turkey

Özen, Murat
To obtain a more sustainable transportation system, it is also important to decrease both fuel consumption and carbon emissions in road freight sector, as well. The first step towards this goal is to determine the current level of road freight demand and related emissions. This is rather challenging in Turkey, because disaggregate commodity flow data does not exist. However, annual roadside axle survey, performed by the Turkish General Directorate of Highways, is a valuable source of circulation information, which are used jointly with aggregate level national freight flow statistics to develop a hybrid model in this study. Using this model, annual road freight emissions for the period of 2000 to 2009 are calculated with COPERT 4 software. The results show that CO2 level remained almost constant during this period. Secondly, a decrease of 25% is observed in the share of rigid truck emissions, while emissions from articulated trucks are tripled. Sensitivity of the model to the available level of disaggregate data is tested via scenario analysis. Assuming 2009 emissions as the base case, emission reduction potentials are evaluated for three interventions: While emissions could be reduced up to 11% by penalizing empty movements just only in the long haul, another scenario focusing on elimination of only inefficiently loaded movements did not provide significant emission reduction capacity. A scenario of replacing Conventional trucks with Euro IV ones showed significant potential, especially for regulated emissions, and it may be the most promising option from application perspective.


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Citation Formats
M. Özen, “Estimation of road freight transportation emissions in Turkey,” Ph.D. - Doctoral Program, Middle East Technical University, 2013.