Request ID: FOI-0104-2324 Date published: 09 May 2023
You asked
Under the freedom of information act
I would like to see in particular the •evidence to support the expansion of ULEZ to boroughs that border the M25 and supporting evidence to show how the scheme will improve the air quality in these areas.
•I would like to see the consultation results of the affected boroughs and the considerations included in the consultation and who the consultation included • I would like to see the evidence of research into what contribution tyre erosion and break pad erosion make towards air pollution in the extended expansion area
We answered
Our Ref: FOI-0104-2324
Thank you for your request received on 10 April 2023 asking for information about the research and consultation on the expansion of the Ultra Low Emission Zone (ULEZ).
Your request has been considered in accordance with the requirements of the Environmental Information Regulations and our information access policy. I can confirm that we hold some of the information you require. You asked for:
• Evidence to support the expansion of ULEZ to boroughs that border the M25 and supporting evidence to show how the scheme will improve the air quality in these areas.
Pollution levels can be found in the Integrated Impact Assessment (IIA) report, section 5. Figures 5-2 to 5-9 provide mapped outputs of the air quality modelling, with the changes in emissions reported for the ‘with scheme’ and ‘without scheme’ scenarios:
• I would like to see the consultation results of the affected boroughs and the considerations included in the consultation and who the consultation included
The information you have requested is included in the consultation report which is published online.
• I would like to see the evidence of research into what contribution tyre erosion and break pad erosion make towards air pollution in the extended expansion area
No specific research related to brake and tyre wear for ULEZ has been carried out. However, the particulate matter emissions data we produce always include both exhaust and non-exhaust (brake+tyre wear) emissions. The consultation materials provide information on exhaust and non-exhaust particulates including in the outer London area.
The LAEI also provides information on the proportions of exhaust and non-exhaust emissions. The data is available under the “Detailed Road Transport” section. Road transport emissions for particulate matter are broken down as exhaust, brake wear and tyre wear, and can be downloaded as Excel and GIS files:
