What would that be?

Not doubting you, just can't think of collateral damage.

The interstate system comes to mind, with neighborhoods torn apart.

"Wrong side of the tracks" used to be a phrase with meaning for a reason.

I assumed the interstate system would benefit from no longer being in a constant state of needing repair.

And I'm not sure if you're suggesting more train tracks would be laid in cities to divide communities? I assumed the discussion was about better utilizing the infrastructure we already have for rail.