WORLD HISTORY

Detailed explanation-1: -Most Roman roads were built using earth, a layer of rough gravel and crushed bricks, and a top layer of finer gravel. The most prestigious roads had a top surface of dressed stone blocks, cobbles or slabs of volcanic tuff, limestone, or basalt.

Detailed explanation-2: -These Roman roads-many of which are still in use today-were constructed with a combination of dirt, gravel and bricks made from granite or hardened volcanic lava. Roman engineers adhered to strict standards when designing their highways, creating arrow-straight roads that curved to allow for water drainage.

Detailed explanation-3: -In addition to the administrative advantages, the Roman roads were used as a military weapon. Just as the roads could be used to speed information to the far corners of the empire, they could also be used to speed armies to defend the borders, or to expand the borders through further conquest.

Detailed explanation-4: -The Romans needed straight, wide, solid roads to transport troops and goods. The roads they built were made from aggregates – lots of different sized stones that compacted down to create a strong, stable and long-lasting surface.