FOI request detail

ULEZ Expansion

Request ID: FOI-2672-2223
Date published: 09 February 2023

You asked
I would like to see the scientific details of how ULEZ has improved air quality and how it will further improve quality when the ULEZ zone is expanded.

We answered

TfL Ref: FOI-2672-2223

Thank you for your request received by Transport for London (TfL) on 17th January 2023 asking for information about the ULEZ expansion.

Your request has been considered in accordance with the requirements of the Freedom of Information Act and our information access policy.

Specifically you asked:

“‘I would like to see the scientific details of how ULEZ has improved air quality and how it will further improve quality when the ULEZ zone is expanded.”

This information is already published on the TfL website. Please see the following links:

https://www.london.gov.uk/sites/default/files/expanded_ultra_low_emission_zone_six_month_report.pdf - see page 25 onwards which provides an analysis of air pollution concentrates in London and
a “ULEZ impact analysis” (beginning on page 30), going back to 2019 when the scheme was first introduced.

https://ehq-production-europe.s3.eu-west-1.amazonaws.com/2e0438f24520ece474690bb99a94108e4a555b1e/original/1652882837/c7731c1b9dd3c304567a31d5b4816351_London-wide_ULEZ_Integrated_Impact_Assessment_%28ULEZ_Scheme_IIA%29_%282%29.pdf?#:~:text=The%20IIA%20provides%20an%20integrated,impacts%20or%20minimise%20negative%20ones - this is the London-wide “ULEZ Integrated Impact Assesment” which assessed the potential likely significant positive and negative impacts of the proposal to expand the ULEZ, and suggested potential mitigations for negative impacts. See section 5 in particular for an assessment of the environmental impact.

The following report to the Mayor from November 2022 further explains the rationale for expanding the zone:

https://haveyoursay.tfl.gov.uk/15619/widgets/58629/documents/34558

More general information and documents relating to ULEZ can be found here (see in particular the section “Supporting evidence” which may be of interest):

https://tfl.gov.uk/corporate/publications-and-reports/ultra-low-emission-zone

In accordance with section 21 of the FOI Act, we are not obliged to supply you with a copy of the requested information as it is already accessible to you elsewhere.

If this is not the information you are looking for, or if you are unable to access it for any reason, please do not hesitate to contact me.

Please see the attached information sheet for details of your right to appeal as well as information on copyright and what to do if you would like to re-use any of the information we have disclosed.

Yours sincerely,

David Wells
FOI Case Officer
FOI Case Management Team
General Counsel
Transport for London
 

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