I'll answer this one. Well there is a company that created an on vehicle electrostatic filter. https://www.youtube.com/watch?v=lTGCFL6fukY

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.