Limestone rocks make most dirtroads, but main roads like highways are made with asphalt.
Military Engineers made Corduroy Roads from felled trees. Most roads were dirt. Some had gravel or stone bases under the packed earth. Corduroy Roads were a quick and easy way to provide a hard surface for foot and horse traffic.
Most exhaust systems are made out of stainless steel, so the won't be affected be the chemicals put on the roads
No the roads are made out of asphalt.
providing security.
providing security
providing security
Modern roads in Italy are made by the government just like they are everywhere.
ROADS ARE MADE OF ASPHALT.
Building a permanent road
asphalt
Roman roads were made with interlocking stones or pavers and still exist. They were well made. Modern are made with a tar base and eventually break down.