I hope this will lead to changes in roads in London and other places. The closest school to me in London is next to a busy road with twice the legal level of no2, you can see all the buildings along that road are noticeably blacker from exhaust smoke. While electric cars may help a bit, rubber from breaking and tyres is an issue, and cares have been getting much bigger over the last 5 years.
In what way are they an issue?
Tyre emissions are around 1/20th of the PM2.5 ejected from the exhaust and the airborne proportion is even smaller.
Edit:
"Committee on the Medical Effects of Air Pollutants" has a fairly non-commital "needs more study" finding but they did say "Non-exhaust particulate matter (PM) emissions, ie from brake wear, tyre wear, road surface wear and re-suspended road dust currently comprise just under 10% of UK primary particulate emissions and they are expected to become proportionately more important, as vehicle exhaust PM emissions from road transport are expected to decrease over the coming years"
https://assets.publishing.service.gov.uk/government/uploads/...