Highway Design Values (IRC)
Reference summary — verify against the current edition of the code before you rely on it in practice. Free tier available — start free.
Highway Design Values (IRC)
| Parameter | Value | Reference |
|---|---|---|
| Max superelevation (plain/rolling) | 0.07 | IRC 73 |
| Coefficient of lateral friction f | 0.15 | IRC 73 |
| Design speed constant (\(e+f = V^2/127R\)) | 127 | — |
| Ruling gradient (plain) | 1 in 30 (3.3%) | IRC 73 |
| Camber (bituminous) | 2.0–2.5 % | IRC |
Typical values for exam use. Actual values vary with grade, source and test condition — use the figure given in the question when one is stated.