Transport for London’s modelling in 2017 forecast that, when it launched in 2021, there would be approximately 100,000 cars and 35,000 vans being driven in the expanded Ultra Low Emission Zone (ULEZ) on an average day that did not meet the ULEZ emission standards.
For November 2021 there were on average around 75,000 non-compliant vehicles in the zone each day of which around 19,600 were not chargeable as they benefited from an extended grace period, exemption or discount, were detected on a diversion route or for which no enforcement action could be taken based on available data. TfL publishes quarterly ULEZ factsheets that are available in the Finance, Operations and Performance section of its website at https://tfl.gov.uk/corporate/publications-and-reports/ultra-low-emission.... These factsheets report the live operations for the scheme and include the daily averages for both compliant and non-compliant vehicles.
Drivers of non-compliant vehicles can walk, cycle, take public transport, use shared mobility such as a car club, upgrade to a cleaner vehicle or pay the ULEZ daily charge for their journeys.