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ULEZ Impact

Questions to the Mayor of London – answered on 17th October 2019.

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Photo of Keith Prince Keith Prince Conservative

Will the Mayor provide me with a clear summary of the methodology being used to measure the impact the introduction of ULEZ has had on emissions in London and ensure I have an opportunity to meet with those applying this methodology?

Photo of Sadiq Khan Sadiq Khan Mayor of London

Earlier this year reports were published evaluating the impact of the central London Ultra Low Emission Zone following its first month and first four months of operation. These reports evaluated the impact of the ULEZ using vehicle compliance data. They found that in July 2019 the average compliance rate with the ULEZ standards was around 73 per cent in congestion charging hours and 75 per cent in a 24 hour period. This is much higher than 39 per cent in February 2017 and 61 per cent in March 2019 (congestion charging hours).

The Central London ULEZ - Six Month evaluation report is now available and can be found here. It includes an evaluation of impacts on air pollution concentrations and emissions and a full methodology. Officers regularly offer meetings to the assembly member researchers and will arrange a full briefing on the ULEZ six month report.