Question to the Department for Transport:

To ask the Secretary of State for Transport, whether she has plans to increase the number of clean air zones.

Clean Air Zones (CAZ) are road user charging measures that local authorities in the Nitrogen Dioxide (NO₂) Programme introduced to address NO₂ exceedances. Local authorities lead the development of plans to improve air quality, which are then assessed by Government. CAZ have been implemented by local authorities where modelling has shown them to achieve NO2 compliance in the shortest possible time. The majority of the local authorities in the programme have agreed their local plans. Greater Manchester’s CAZ remains under review.