Correct Answer - Option 3 : 1 vertical in 50 horizontal
Explanation
Modern roads are generally made of Cement concrete or high type bituminous pavements. For this type of road surfaces, IRC recommended the camber of 1 in 50 (2%) and 1 in 60 (1.7%) in case of heavy and light rainfall respectively.
Hence, 1 vertical in 50 horizontal is a correct option.
Important Point:
IRC specified different values of camber as mentioned below in tabulated form on the basis of type of surface and amount of rainfall.
|
Road Surface
|
Heavy Rainfall
|
Light rainfall
|
|
Cement concrete or high type bituminous pavement
|
1 in 50 (2%)
|
1 in 60 (1.7%)
|
|
Thin bituminous surface
|
1 in 40 (2.5%)
|
1 in 50 (2%)
|
|
Water bound macadam(WBM) or gravel pavement
|
1 in 33 (3%)
|
1 in 40 (2.5%)
|
|
Earth
|
1 in 25 (4%)
|
1 in 33 (3%)
|
