Highway Engineering
The shape of the camber, best suited for cement concrete pavements, is

elliptical
combination of straight and parabolic
straight line
parabolic

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Highway Engineering
The effect of grade on safe overtaking sight distance is

to increase it on both descending and ascending grades
to increase it on descending grades and to decrease it on ascending grades
to decrease it on descending grades and to increase it on ascending grades
to decrease it on both descending and ascending grades

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