Opportunities for Future Tailpipe Emissions Regulation of Light-Duty Vehicles Within the European Union

Abstract

The introduction of on-road real driving emissions (RDEs) tests for type approval and in-service emissions compliance has driven the reduction of on-road tailpipe emissions from light-duty vehicles within the European Union. However, further reductions of tailpipe emissions are possible. With the European Commission currently deliberating whether, after Euro 6, a further emission standard is necessary, this chapter discusses potential areas of improved emissions regulation in relation to light-duty vehicles. A general overview is given of the drivers for further reductions of tailpipe emission limits, the regulation of currently unregulated pollutants, improvements to the RDE test procedure as well as increases to durability and in-service conformity requirements.