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Bunch of middle class wingebags failing to see the bigger picture of improving CS1 and the immediate area. They should be glad they live in Hackney which might not be perfect but at least it's actually trying to do something about this kind of thing (and seriously, can anyone name a local authority who's doing it better?).
How else can you predict the effect of changes without modelling anyway? These parents have obviously had enough of experts. The projected 40.9 or 40.1 µg/m³ is a big improvement on the current 45 and as that report says only just above the 40 limit. Not great, no, but there are plenty of schools in London with NO2 levels way above that in the 50s and even into the high 60s.
The worst is St Mary’s Bryanston Square in Westminster with 67 µg/m³ and there's a distinct lack of middle class outrage for schools like Woolmore Primary School on the A102 Blackwall Tunnel approach road in Tower Hamlets with 62 µg/m³. Funny that.
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@Oliver Schick
I don't know if anyone's been following the row in Stoke Newington over air quality levels at schools, particularly at William Patten School in Church Street. This was originally prompted by a Council proposal to modally filter the area south of there (although the current proposals are poor for various reasons) and has descended into quite a low-level debate over pollution data which I think rather misses the point. Here's the latest instalment:
https://www.hackneygazette.co.uk/news/air-quality-report-can-t-convince-stoke-newington-parents-1-5986721
The parents' fear is that motor traffic levels along Church Street would increase if through motor traffic were removed from the to-be-filtered area, and hence air quality in the William Patten playground, which is directly adjacent to Church Street, would get much worse. This would almost certainly not be the case, as there would certainly be a reduction in overall motor traffic in the area without much of an increase on the streets along the cell boundary (among them Church Street). Plenty of other such schemes have shown considerable reductions, although in many cases the data is skewed because at the same time whopping great new ring roads or by-passes were built. At any rate, filtering this area will be a necessity should the Stoke Newington gyratory be returned to two-way.
In my experience, predictive scenarios ('modelling') for this sort of thing tend not to include all the factors and stand and fall by the initial assumptions that are made. This study may well be different, but modelling generally tends to reflect little change from the status quo, as it is (or the modellers are) inherently conservative.
Anyway, this will probably fester some more before it comes to any conclusion.