Which consequence resulted when Roman road construction exceeded gradients of 10-12% on mountain passes?

💡 Explanation

Increased gradient leads to concentrated water runoff, where Hydraulic action caused severe surface erosion because the increased velocity of water flow overwhelms the original drainage plans. Therefore erosion risk increased, rather than buckling arising from heat directly impacting pavement.

• Which mechanism explains why medieval longships could sail relatively close to the wind, unlike ancient square-sailed galleys?
• Which risk increased for early Bronze Age smiths when arsenic levels varied in copper ores?
• Which consequence occurs when thermal cycles act on pietra dura inlay?
• Which risk increases when surface pressure exceeds material yield strength surrounding 'pietra dura' inlay in Mughal-era structures?
• Which consequence increased risk resulted in Mughal garden water systems when aqueducts experienced sedimentation?
• Which risk was notably amplified when Viking longships encountered tidal currents near temporary rope bridges?