Which effect arises when Roman roads experience differential seasonal ground heave?

💡 Explanation

When segments of the roadbed experience differential ground heave duing differing seasonal conditions of moistures and temperature, tensile stresses accumulate because thermal expansion mismatch creates internal forces which exceed the structural integrity limits leading to cracking of materials. Therefore, road cracking is the result, rather than rutting, potholes, abrasion which depend on other failure modes, e.g. cyclic loads or impact.

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