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

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

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Highway Engineering
With increase in speed of the traffic stream, the maximum capacity of the lane

first decreases and then increases after reaching a minimum value at optimum speed
increases
decreases
first increases and then decreases after reaching a maximum value at optimum speed

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

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