Which consequence increased erosion along Roman roads built on steep slopes?

💡 Explanation

Hydraulic scouring became prevalent due to inadequate runoff control; this process involves detachment and transport of particles. Because roads lacked sufficient culverts and drainage ditches, increased water flow concentrated during rainfall. Therefore scouring worsened erosion, rather than compaction or alignment errors.

• Which consequence resulted from thermal changes in late Roman fortifications employing concrete?
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