camber transportation engineerin

v      Camber

Camber is the slope given to road pavement in cross section. It’s use is to drain out rainwater into side drain so that the pavement is free of water. Parabolic or elliptic shape is preferred for fast moving vehicles since they are likely to cross the crown frequently in overtaking operation

·        The required of camber depends on:

1. the type of pavement surface 
2. the amount of rainfall

 Value of camber given by IRC

SL NO	Types of road surface	Range of camber in area of rainfall range
		Heavy rain      to	Light rain
1	Cement concrete and high type bituminous surface	1 in 50 (2.0)% to	1 in 60(1.7)%
2	Thin bituminous surface	1 in 40 (2.5)%  to	1 in 50(2.0)%
3	Water bound macadam and gravel pavement	1 in 33 (3.0)%  to	1 in 40(2.5)%
4	earth	1 in 25 (4.0)%  to	1 in 33(3.0)%