In periglacial regions with significant solifluction, creating elevated roads requires which additional mitigation measure to maintain stability?

💡 Explanation

When thawing weakens slopes, solifluction occurs because the active layer saturates and flows slowly downslope by gravity, destabilizing the ground for roads. Therefore, creating drainage and terraces manages water and reduces slope length, instead of cooling systems (permafrost setting), compaction (short-term fix), or chemical additives (erosion but less effective).

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