I released this information in my “Central London Ultra Low Emission Zone – Four Month Report” published on 17 September 2019.
I am pleased to note that thousands of drivers in London have changed their behaviour since the ULEZ launched on 8 April 2019. As outlined in the report, in the first four months of operation, the compliance rate with the ULEZ standards was around 75 per cent in a 24-hour period, and 73 per cent in congestion charging hours – a huge increase from 39 per cent in February 2017, and 61 per cent in March 2019 (congestion charging hours).
There were around 12,500 fewer older, more polluting, non-compliant vehicles seen in the zone on an average day (excluding non-typical days), a reduction of over a quarter (35 per cent).
It should be noted that the data will build over time to give a clearer picture of the longer term rates of compliance.