That was my initial reaction as well, but after thinking about it more, I think I disagree… Most road damage occurs due to freezing and thawing cycles. If you take that away altogether, I imagine the road lasts longer in general.

I imagine it’s also cheaper in energy costs than mobilizing a fleet of plows and salt trucks (which, again, destroy roads). Hell, put some solar panels up on the side of the road, and some batteries, and they might be able to power themselves.