rail vehicles do not generally have higher specific energy savings, their great potential for energy savings by weight reduction mainly results from the high life-time per- formance. Freight trains have higher life-time energy savings because of their possibil- ity for the transportation of a higher payload.
Chart 3: Life time primary energy savings of the use phase for selected vehicle examples Life-time primary energy savings [GJ/100kg]
Long distance bus
High speed passenger train
freight train freight train
Source: IFEU 2002 from various sources (Figures rounded) Remark: Error ranges signify the sensitivity to uncertainties in basic data
The CO2 savings depend on the final energy savings and the emissions from the en- ergy supply. While refineries are similar in most countries, power plants vary by the primary energy source. Generally the energy split used to generate the power deter- mines the CO2 emissions. In countries with a high share of regenerative or nuclear power, CO2 emission savings will be significantly lower than in countries which gener- ate their power by the use of fossil fuels. For this analysis we use the energy split of the EU 15 with 34.3 % nuclear energy ([EC 2002]). Adjustment in the CO2 emission factors can be made for the respective energy split for country based case studies.