Which outcome occurs when Roman road construction encounters subsidence?

💡 Explanation

Frequent repairs elevating surfaces are needed because differential settling causes road failure. Subsidence weakens load-bearing capacity due to differential COMPACTION of soil below, therefore repairs require elevation adjustments, rather than inherent prevention or resistance.

• Which navigational risk increases when an 18th-century mariner omits index error calibration from their sextant observations?
• Which risk dramatically increased when Viking longships used hemp ropes weakened by persistent saltwater exposure?
• Which outcome arose from the Roman army employing articulated siege towers during sieges?
• Which problem faced Mesopotamian irrigation systems when bronze tools blunted during canal construction?
• Which risk acutely increased as Chinese miners switched from bamboo fuse to gunpowder for blasting?
• Which outcome arises from thermal expansion within a brass framed 18th-century sextant used at sea?