What is superelevation?

Question

Accepted Answer

Superelevation is the banking or tilting of a roadway on a curve to counteract the centrifugal force.

Superelevation is used to increase the safety and comfort of vehicles traveling on curved roadways.
It involves raising the outer edge of the road higher than the inner edge to create a sloping surface.
The amount of superelevation required depends on factors such as design speed, curve radius, and vehicle characteristics.
Superelevation is typically expressed as a percentage, representing the ratio of the height difference between the outer and inner edges to the width of the roadway.
For example, a 4% superelevation means that the outer edge of the road is raised 4% higher than the inner edge over a distance of one roadway width.
Superelevation is achieved by either tilting the entire roadway or by using a combination of banking and super elevating the pavement surface.
It helps vehicles maintain better traction and reduces the risk of skidding or overturning on curved sections of the road.

Accepted Answer

When a vehicle negotiate in a horizontal curve of a road ,the outer side of road is kept higher than the inner side to counteract the centrifugal force.This vertical distance of height which is above the straight portion is called superelevision.e=V²/rg

e=superelevision

V=speed of vehicle km/hrs

r= radious of cutve in Mt

g= gravitational force in m/ sec²

Accepted Answer

plays an important role to counteract the centrifugal force which is acting on the vehicle moving from the horizontal curve of the road The attainment of superelevation in roads is done into two parts

What is superelevation?

Top Royal Infraconstru Civil Engineer-Highway/Roadway interview questions & answers

Popular interview questions of Civil Engineer-Highway/Roadway