Basalt can be used for making roads
Probably none are still used as roads. Parts of some are still used as roads and parts are used as tracks or footpaths.
are used to add the sparkling quality to paint used on roads.
roads
It is used to pave roads etc.
On roads
Yes.
asphalt
Back then, roman roads were used to transport goods. They used horses and carts to move tradable items around the country.
The roads built by the Inca empire were primarily used by the Inca people and their armies for transportation, communication, and trade. These roads were also used by other indigenous groups, messengers, and traders. After the Spanish conquest, the roads were used by the Spanish colonizers and later by indigenous and mestizo populations during the colonial period.
for military propose or to get mountains out of the way to make roads or rail roads
A Roman soldier didn't "drive" because cars were not invented until 1889, so none existed two thousand years ago. Roman soldiers walked, in fact, most people did unless they rode a horse, had a cart, or were on a boat/ship. (Since there were an insufficient number of horses on the road to cause an issue, the rules of "driving on the right/left" were not invented during that period.)