The accurate measurement of vehicles' tailpipe emissions, a key element in governments' policy decisions and consumers' choices to reduce the impact on air quality and the environment, will be significantly enhanced thanks to the adoption today of the United Nations Regulation on global Real Driving Emissions (Global RDE).
Building up on the existing legislation in Japan and the European Union, the new UN regulation will measure emissions under most driving conditions, thus providing a much more accurate picture of vehicles' emissions, and complementing measures done in test laboratories.
Under the Global RDE UN Regulation, emissions in real driving conditions shall not exceed laboratory limits by more than 10 % for nitrogen oxides (NOx) and 34 % for particulate matters.
The Regulation was adopted by all contracting parties to the 1958 Agreement. In addition to the 57 contracting parties, UN vehicle regulations are often applied by other countries using them as a basis for national legislation.
The UN Regulation on Global RDE can be used together with UN Regulations No. 154 on emissions from light duty passenger and commercial vehicles, and No. 83 on provisions concerning the approval of vehicles with respect to the emissions of pollutants according to engine fuel requirements. Or it can be used as standalone procedure using the emission limits coming from local laboratory tests as a reference.
