Real-world emissions testing will be introduced in London and Paris by the end of 2017 to help score new cars based on how environmentally friendly they are, encouraging their uptake and reducing air pollution in cities.
The decision was made in a meeting between London Mayor Sadiq Khan and his Parisian counterpart Anne Hidalgo, along with senior city officials and representatives of several major car manufacturers.
Current emissions testing only regulate some pollutants and require vehicles to meet the standards in laboratory conditions, but the new scheme will score each model score based on all of the air pollutants they release in on-road conditions. These scores will then be made available online to consumers through dedicated websites.
The Volkswagen dieselgate scandal has heightened awareness of current tests' shortcomings, leading many to call for a radical rethink of how emissions are measured.