During Roman road construction, which risk increased from inadequate subsurface drainage?

💡 Explanation

When subsurface drainage is inadequate, water accumulates and freezes, undergoing expansion that exerts pressure on the road structure, accelerating pavement damage. Therefore, pavement buckling increases due to freeze-thaw cycles, rather than aggregate separation, settlement cracking, or rutting, which require different loading mechanisms.

• Which outcome results when early steam engine boilers experience repeated heating-cooling cycles?
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• Which soil degradation risk increases when poorly designed Inca agricultural terraces experience heavy rainfall?
• Which error increases in 18th-century sextant measurements if the horizon mirror develops parallelism error relative to the frame?
• Which optical phenomenon causes distorted star positions viewed through Earth's atmosphere, impeding ancient astronomical observations?
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