Highway Engineering
The attainment of super elevation by rotation of pavement about the inner edge of the pavement

avoids the drainage problem in flat terrain
does not change the vertical alignment of road
is preferable in steep terrain
results in balancing the earthwork

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

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

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