The goal of a Clean Air Zone is to encourage owners of older, more polluting vehicles to upgrade to a cleaner vehicle. It does not aim to tackle congestion and in a successful scheme, revenues will decline over time as the fleet becomes increasingly compliant.
The GM Clean Air Zone is not designed to make a profit; however, any net proceeds would be applied to further deliver the Local Transport Plans of the 10 GM Local Authorities, in accordance with the Transport Act 2000.