> As for why roads are normally made out of “normal” concrete, it’s very expensive to build roads like that. > Pavements are cheaper to build out of concrete b

> As for why roads are normally made out of “normal” concrete, it’s very expensive to build roads like that. > Pavements are cheaper to build out of concrete because they only carry the weight of pedestrians, not lots of rolling vehicles. > You need a pretty thick slab with rebar in it if you want to build a road surface from it, due to how weak cement concrete is under tension. Maybe. OTOH the bays of bus-stops tend to be made of the rebared thick slabs in a town with higher traffic I happen to know. Since about a decade at least. Before that there were always ruts in the asphalt, so deep they needed to be fixed again and again. Not so with the rebared slabs.