Effect of missing superelevation on curves If no superelevation is provided on a curved road, where are potholes most likely to develop over time?

Introduction / Context:Superelevation counters centrifugal effects by banking the pavement. Without it, vehicle loads and lateral forces become unbalanced on curves, influencing where distresses like potholes develop.

Given Data / Assumptions:

• No superelevation (cross slope not adjusted for curvature).
• Normal traffic flows and speeds.

Concept / Approach:Due to centrifugal force, vehicles tend to drift outward on curves, increasing wheel loads and scuffing on the outer edge. Repeated outward load concentration and water retention near that edge accelerates deterioration and pothole formation there.

Step-by-Step Solution:Recognize unbalanced centrifugal effects without banking.Heavier effective loading and side friction act near the outer edge.Therefore, potholes preferentially develop at the outer edge.

Verification / Alternative check:Pavement condition surveys frequently record greater edge distress on the outside of curves lacking adequate superelevation.

Why Other Options Are Wrong:

• Inner edge/centre: less lateral load concentration.
• Nowhere: contradicted by field performance.

Common Pitfalls:Confusing camber-only sections (drainage) with superelevation; camber does not replace the need for banking on curves.

Final Answer:outer edge of the road