Which outcome occurred if Roman road builders laid paving stones directly on unstable clay soil?

💡 Explanation

When Roman road builders built directly on clay, differential settling occurs because the clay consolidates under load unevenly, causing ruts and subsidence in the road surface. Therefore rutting results, rather than smoothness, drainage benefits or decreased weeds, which clay soil would not induce without proper construction techniques.

• Which accuracy risk increased when using chronometers for longitude determination in 18th-century sailing despite use of sextants?
• Which risk increased significantly when early Mesopotamian bronze-tipped plows encountered saline soils?
• Which soil enhancement mechanism primarily sustained the crop yield of Aztec chinampas (floating gardens)?
• Which limitation constrained accuracy of 18th C. maritime position fixes using sextants during heavy fog?
• Which risk increases when Roman road builders laid paving stones directly on unstable subsoil?
• Which structural consequence increases when a Roman ballista launches projectiles beyond its design range?