[jessaustin]

Not sure if this test was set up to measure this, but brake dust, which contains all sorts of noxious particles, is a huge component of automobile emissions. This probably doesn't answer your question, however, because brake pads themselves only weigh so much...

[mycall]

I thought brake pads use asbestos which contribute to the noxious particles.

I do think Vehicle-to-vehicle communications will eventually minimize the all the chicken necking, evening out the traffic and thus less breaking.

[cjensen]

Brake pads have not used asbestos in several decades.

[jessaustin]

New pads on new passenger vehicles haven't, but it's still legal to use asbestos in aftermarket pads.

https://parts.olathetoyota.com/what-are-brake-pads-made-of

[gambiting]

Fitting or sale of automotive products containing asbestos has been banned in the EU since 2004

https://www.asbestosadvicehelpline.co.uk/is-asbestos-still-u...

[ta999999171]

I live in the other 75% of the world, though.

[trav4225]

Unfortunately, I do not believe that this is true. My understanding is that it's still quite common, and even more so in developing countries.

[njarboe]

Electric vehicles have regenerative braking when not braking hard. This dramatically reduces brake wear.

[Gibbon1]

Hybrids as well.