| Road Geometric design Prerequistie |
| |
Horizontal Alignment |
Specify |
| 1 |
Classification of road |
NH/SH/Etc |
| 2 |
Type of terrain |
Plain/Rolling/Hilly Etc |
| 3 |
Number of Lanes |
2,4,6,8 |
| 4 |
Manual and Specifications for highway design |
IRC SP 73,84,87,99 |
| 5 |
Design speed |
As per Class of road |
| 6 |
Design Vehicle |
As per Class of road |
| 7 |
Minimum Design Speed |
As per IRC |
| 8 |
Minimum Curve Radius |
As per IRC |
| 9 |
Minimum Curve Length |
As per IRC |
| 10 |
Minimum Transition Length |
As per IRC |
| 11 |
Maximum Superelevation |
5% for plain and 7% for steep |
| 12 |
Typical cross section |
As per applicable lanes |
| 13 |
Extra widening if Applicable |
As per radius of curve |
| 14 |
Safe stopping sight distance |
As per Design speed |
| 15 |
Intermediate sight distance |
As per Design speed |
| 16 |
Overtaking sight distance |
As per Design speed |
| |
Vertical Alignment |
|
| 17 |
Ruling Gradient |
3.33% for Plain |
| 18 |
Limiting Gradient |
5% for plain |
| 19 |
Minimum Gradient |
0.50% |
| 20 |
Width of Median |
If any |
| 21 |
Paved Carraigeway width |
As per Lane configuration |
| 22 |
Unpaved shoulder width |
As per IRC Manual |
| 23 |
Type of Slope in Embankment |
As per IRC Manual |
| 24 |
Width of Drain if Any |
|