Basis for the Targets The target proposed for the transport sector is a 20% reduction in the average energy intensity of the road vehicle fleet (determined from the vehicle energy consumption per km as specified on the fuel economy label). This target is based on an assumption that the average fuel efficiency of new vehicles will be about 50% lower than today (based on IEA estimates), combined with conservative assumptions about the rate of turnover of the stock of vehicles. The Department of Energy Integrated Energy Plan (IEP) and Integrated Resource Plan (IRP) jointly define the anticipated energy mix with a view to informing policy to address future energy service needs efficiently and in the most socially beneficial manner. While the dominant role of coal-fired power is expected to continue through to 2030, solar PV, wind and other renewable energy sources are anticipated to increase in importance in the energy mix. The main mechanism for the promotion of renewable generation is the Renewable Energy Independent Power Producer Procurement Programme (REIPPPP), which was launched in 2011 after earlier moves to introduce a feed-in tariff were unsuccessful.