Highway Engineering
The entrance and exit curves of a rotary have

equal radii but pavement width is more at entrance than at exit curve
equal pavement widths but radius is more at entrance curve than at exit curve
different radii and different widths of pavement
equal radii and equal widths of pavement

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Highway Engineering
The direct interchange ramp involves

diverging to the left side and merging from right
diverging to the right side and merging from right
diverging to the left side and merging from left
diverging to the right side and merging from left

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