sand gravel, asphalt, pavement, concrete, and rebar
asphalt
Normally tarmac
The Romans made their roads using layers of different sized rocks. Their roads were very strong and durable. Some still exist today.
It is unknown who came up with the idea to pave roads with concrete. The first concrete paved road was built in 1909 and was Woodward Avenue in Detroit, Michigan.
The Romans built stone-paved roads which were covered with local rocks cut into squares or polygonal slabs of lava. These roads had a military purpose. They made the movement of soldiers and the delivery of supplies to troops at the front or stationed in garrisons much easier and faster. Their military nature was also shown in by the fact that they were usually built on a straight line, even when they crossed hilly areas. Traders also used these roads to transport their goods. They complained that the straight tracts over steep gradients made it very difficult for their laden wagons. After these complaints at least some of these tracts were redesigned to allow for less steep gradients. The paved roads covered 20% (80,500 kilometres, 50,313 miles) of the total network of roads (400,000 kilometres, 250,000 miles) in the Roman Empire.
it is IMPORTANT because bridges and roads are what made up parts of the world
Your houses and buildings stand on them, your roads are made of them the earths mass is made up of rock
No the roads are made out of asphalt.
Modern roads in Italy are made by the government just like they are everywhere.
Roads are the black hard stuff on the ground for cars to drive on. Roads are made of tar. Tar is sticky black stuff that is made of tree skeletons.
ROADS ARE MADE OF ASPHALT.
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.
Roads have been dated back to 4000BC in the Middle East.
corduroy
concrete
roads?