This article identifies which effects contribute to the carbon dioxide emissions (CO₂) intensity in the transport sector in the period 2008–2018, in EU 27 European countries. The technique of Complete Decomposition was applied to calculate six effects: (i) CO₂ emissions, compared to the consumption of fossil fuels (Effect CF); (ii) consumption of fossil fuels compared to electricity (Effect FE); (iii) electricity consumption compared to the total energy consumption (Effect EEn); (iv) total energy consumption compared to the capital used (Effect EnK); (v) capital per capita (Effect KP) and (vi) inverse work average of productivity (Effect LVA). The study revealed that emissions intensity in the transport sector have diminished and that the more relevant effects were Effect EnK and Effect KP in the majority of the countries analyzed. Denmark and Lithuania show a distinctive pattern with Effect CF, Effect LVA and Effect Een presented as the more important. This article add value as its results are relevant for adequating environmental policies to the transport sector, and as there is a main shortcoming found in the literature review, related with the lack of studies applied to Europe regarding the analysis of CO2 emissions intensity and in particular for the transport sector.

本文确定了 2008 年至 2018 年期间欧盟 27 个欧洲国家运输部门二氧化碳排放 (CO ₂ ) 强度的影响因素。应用完全分解技术来计算六种效应： (i) CO ₂与化石燃料消耗量相比的排放量（Effect CF）；(ii) 与电力相比化石燃料的消耗量（Effect FE）；(iii) 与总能耗相比的电力消耗（Effect EEn）；(iv) 与所用资本相比的总能耗（Effect EnK）；(v) 人均资本 (Effect KP) 和 (vi) 逆向工作平均生产率（Effect LVA）。研究表明，交通部门的排放强度已经降低，并且在分析的大多数国家中，更相关的影响是 Effect EnK 和 Effect KP。丹麦和立陶宛表现出独特的模式，其中 Effect CF、Effect LVA 和 Effect Een 显得更为重要。本文增加了价值，因为其结果与交通部门的环境政策充分相关，