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GATE Exam Questions - Engineering

Q1:

Transition curves are provided on the approach to horizontal curves in order to :

A increase jerk to allowable levels

B minimize the length of the horizontal curve

C simplify the laying-out and construction of the horizontal curve

D reduce jerk to allowable levels

ANS:D - reduce jerk to allowable levels

As you traverse along straight road to horizontal curved road there is, sudden introduction of centrifugal force, (= M*v^2/R) , due to which a driver can experience sudden jerk and also might lead to the overturning of vehicle.

Therefore to avoid this transition curve is provided, such that curve radius is provided gradually, leading to the gradual introduction of centrifugal force. Hence reducing jerk.