Clean Air Zones: Enforcement
The question
To ask the Secretary of State for Transport, what assessment she has made of the effectiveness of clean air zone enforcement policies.
Answered by Lilian Greenwood
Clean Air Zones work. Between 2019-2023, in the areas of cities that have a CAZ, NO2 concentrations have reduced by between 15% and 42%.
Local authorities are responsible for the implementation and enforcement of Clean Air Zones, for example issuing Penalty Charge Notices. Therefore, any assessment of the effectiveness of enforcement policy is a matter for them.
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