The reduction of CO2 emissions in the society cannot prescind from a drastic reduction of the emissions caused by transportation. Currently, in the European Union (EU), the transportation activities (passenger cars and goods transportation) cause more than 20 % of the total greenhouse gas (GHG) emissions . This makes the reduction of the carbon intensity of transportation a key factor to reach the "net-zero" GHG emissions. The electrification of transportation is envisaged as the most promising option for the reduction of such emissions and several countries declared the intention to phase-out combustion engine vehicles . This will mainly be achieved by using battery electric vehicles (BEV). Additionally, fuel cell electrical vehicles (FCEV) can be considered an alternative, as they do not cause any direct carbon emission during the oxidation cycle that produces electricity. This latter technology is of particular interest for heavy duty vehicles . Several studies discussed in literature the environmental impact of BEV; most of them concluded that these vehicles originate lower GHG emissions over their entire lifecycle than equivalent internal combustion engine vehicles . However, this assumption is only valid if the source of electricity or H2 is accompanied by a low carbon footprint .