Answer:
A parabolic or crown camber shaped road is slightly higher at the center and lower at the outer edges allowing water to drain off the road
Explanation:
Camber or cross slope or cross fall is the shape of the slope of the transverse direction of road constructed to as facilitate the draining off of water from the road for reasons including;
1) The prevention of an ingress of water into the subgrade soil from the overlaying pavement
2) To prevent the pavement from remaining wet for long periods by draining off the water from the pavement surface
3) The protect the bituminous layers from becoming weak due to water ingress
4) To avoid the accumulation of rainwater in locations of the road that are lower than surrounding areas which are unsightly and inimical to the longevity of the road
5) Increase road safety by improving traction of car tires on the road by keeping the road relatively dry
