Yikes. You are right and I had not thought about tires as an obvious source of microplastics.
What's the solution though?
What's the solution though?
Higher quality tires that wear more slowly may also improve this.
It's too bad rail is so expensive to make compared to roads. Imagine if all roads were instead rail lines, computer controlled. Would make self driving a lot easier to solve. No tire dust...
Maybe if robots could lay the tracks down. OK this idea is out there, but it doesn't seem too crazy tbh.
> It's too bad rail is so expensive to make compared to roads.
Is that actually true? I mean, by what measure is rail more expensive? In comparison to rail road travel is massively subsidised. If we break down cost it would be interesting to see how they actually stack up against each other.
Your average truck puts out 8 metric tons per axle [1], railroads have to deal with 20-25 tons per axle [2] (and records of 40 tons/axle in Australia [3]). That is an awful lot more force that needs to be distributed into the ground, particularly as trucks usually reach only 80 km/h whereas freight trains run at 120 km/h in Europe [4].
Additionally, road vehicles have way more tolerance for shoddy road conditions - small bumps and potholes won't bother them too much, even at higher speeds, whereas rail vehicles are really, really prone to (deadly) derailments when the track goes bad for whatever reasons.
All of that makes constructing rail way more complex and as a result expensive.
[1] https://en.wikipedia.org/wiki/Road#Maintenance
[2] https://www.forschungsinformationssystem.de/servlet/is/32505...
[3] https://en.wikipedia.org/wiki/Axle_load
[4] https://de.wikipedia.org/wiki/G%C3%BCterzug#Geschwindigkeite...
And the only way to achieve that capability is lots and lots of very thick steel.
My impression was that permitting, land acquisition, and delays due to legal battles make up a ton of the cost. At least in the US.
I wonder also if tires could be made to be just as durable yet biodegradable?
Or could bacteria be introduced to roads that eats these particles? I suppose you don't want to make road slippery though.
Yes I agree to drive less, but this really seems like a pretty big problem that needs some solving. Recent medical studies found microplastics in our bloodstream & lungs. Not good.
Most pickup trucks and midsized SUVs weigh more than this.
Car taxation should scale quadratic with weight.
I bet all things considered, ICE Toyota Yaris is less bad for the environment than some Tesla.