| Comment | It's not really about reducing traffic volumes. If anything it's overly targetted, and quite far from being a general anti-car measure. If it were, the limits would be much, much lower than they are in order to widen the number of cars that are non-compliant.
It's aimed simply at reducing the number of vehicles in the city centre that emit extreme levels of NO2, which [is highly damaging to people's lungs](https://www.gov.uk/government/statistics/air-quality-statistics/ntrogen-dioxide#:~:text=Short%2Dterm%20exposure%20to%20concentrations,cause%20changes%20to%20the%20environment.). |
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