Baroness Jones of Whitchurch – 2016 Parliamentary Question to the Department for Transport

The below Parliamentary question was asked by Baroness Jones of Whitchurch on 2016-05-03.

To ask Her Majesty’s Government what steps they are taking to improve the measurement of diesel emissions from cars in the light of evidence that nitrogen oxide emissions in real time road trials are up to 12 times higher than in laboratory tests.

Lord Ahmad of Wimbledon

The UK Government has been at the forefront of action at European level to introduce Real Driving Emissions (RDE) testing for new cars. The RDE test will be conducted on public roads and will require manufacturers to ensure new diesel (and petrol) cars control nitrogen oxide emissions to below 2.1 times the laboratory test limit from 2017. From 2020 the requirement will be tightened so they must be at or below the laboratory limit (with a margin for measurement uncertainty).