Highway Engineering
The function of an expansion joint in rigid pavements is to

Resist stresses due to expansion
Relieve shrinkage stresses
Relieve warping stresses
Allow free expansion

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Highway Engineering
For a constant value of coefficient of lateral friction, the value of required super-elevation increases with

decrease in speed and with increase in radius of curve
decrease in both speed and radius of curve
increase in speed and with decrease in radius of curve
increase in both speed and radius of curve

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