this post was submitted on 17 Aug 2023
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There's a study that says most pollution from passenger vehicles is from tire dust.
So the repeated braking and acceleration will add even more tire dust, making it more than 3x worse?
Tire degradation comes from heat. Going slower produces less heat and therefore less pollution. On top of that, slower speeds are better for fuel economy as you aren't dealing with wind resistance as much. That's why the u.s. set the national speed limit to 55 during the 70s oil crises. Of course today's cars that use hybrid and cvt transmissions are even more efficient at slower speeds than cars from 50 years ago.
...thats constant speed.
Constantly slowing and accelerating due to speed bumps is horrible for fuel efficiency.