WORLD HISTORY

Detailed explanation-1: -The biggest roads were the public roads as they were the most traveled, with carts full of goods and people traveling throughout the vast empire. The Via Appia, Figure 1, was the first road of this kind that was created by skilled builders and engineering.

Detailed explanation-2: -Roman roads were built initially to move army troops quickly from one province to another and the aqueducts to refurnish the ever-growing population with fresh water.

Detailed explanation-3: -The engineers laid whole cities above a systematized grid of sewage lines, all interconnected with chains of toilets and public baths. Each house had a gutter that was usually covered and interconnected with the rest. Hence, the Romans can be credited with inventing the modern age sanitation system.

Detailed explanation-4: -Romans built aqueducts and other constructions using a mixture of stone, brick and a volcanic cement known as pozzolana, that held it all together in place. It was this remarkable, innovative substance that allowed Roman aqueducts to stay so strong, and the reason why so many are still standing today.