💫The maximum superelevation (or banking) of a road curve is typically limited to 8-10%, but can vary depending on the terrain, climate, and the type of road.

🚧For instance, while rural highways in the US might have a maximum of 10%, and urban roads are limited to around 6%, Indian Roads Congress (IRC) guidelines suggest a 7% maximum for plain and rolling terrains, and 10% for hilly terrains.

⏺Superelevation is capped to ensure safety, preventing slow-moving vehicles from skidding on curves and reducing the risk of rollovers.

⭐️Factors influencing the maximum superelevation

Terrain:

⏺Hilly areas may allow for higher superelevation rates (up to 10%) than plain or rolling terrain, where the limit is typically lower (around 7%).

Climate:

⏺In areas prone to snow and ice, lower maximum superelevation (around 7%) is used to prevent slow-moving vehicles from sliding inwards on slippery surfaces.

Road Type and Location:

⏺Urban roads, with their lower speeds and varied traffic, often have stricter limits on superelevation (around 4-6%) compared to rural or highway routes.

@etconp