The European Clean Vehicle Directive was introduced in 2009 to create the obligation for public authorities to take into account the impact of energy consumption, CO2 emissions and pollutant emissions, into their purchase decisions for road transport vehicles. This should stimulate the market for clean and energy-efficient vehicles and improve transport’s impact on environment, climate change and energy use. Therefore the so-called ‘Operational Lifetime Cost’ of a vehicle is calculated, split up into the cost for energy consumption, CO2 and pollutant (NOx, PM, NMHC) emissions. In Belgium, a different methodology has been developed to calculate the environmental impact of a vehicle, called ‘Ecoscore’, based on a well-to-wheel approach. More pollutants are included compared to the Clean Vehicle methodology, but also indirect emissions are taken into account. In this paper, both methodologies are compared and used to analyze the environmental performance of passenger cars with different fuel types and from different vehicle segments. Similar rankings between both methodologies are obtained, however the large impact of energy use (and CO2 emissions) in the Clean Vehicle methodology disadvantages CNG cars, as well as diesel cars equipped with particulate filters, compared to the Ecoscore methodology.
Original languageEnglish
Pages (from-to)335 - 346
Number of pages12
JournalTransportation Planning and Technology
Issue number3
Publication statusPublished - 23 Feb 2015

    Research areas

  • environment, tailpipe emissions, passenger cars, Well-to-Wheel (WtW), valuation methodology

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