Roman roads were not built by the lowest bidder.
Roman road building was not meant to be a never-ending jobs program.
I worked on a dirt road being paved back in 1964. Lots of grave hauled in, leveled, then road graded back up and spread out again, then graded up again, over and over all summer.
Finally they got the gravel down again, sprayed oil and gravel over it. DONE!
Within a year it was breaking up.
Saw another dirt road being paved. Hot mix asphalt was used. After forty forty five years it is still good.