My first question: Is this cheaper than asphalt roads? Here in Sonoma County, we’ve just been informed that the County supervisors are going to let most of our country roads go to wrack and ruin because we can’t afford to maintain them. Seriously, they’re going to let the present asphalt roads “degrade” to cobblestone-sized pieces (which will take about ten years, and guess how much FUN it’s going to be driving on these POS roads during that time?), and then they’re going to pulverize the pieces and turn them back into gravel-type roads. Progress, my @ss. Maybe we’ll have sandstone roads in place before this “plan” of their can come to pass. One can hope.
That's the claim. But I'd guess that the cost of road maintenance is mostly in labor.