Highway Engineering
The sequence of four stages of survey in a highway alignment is

map study, preliminary survey, reconnaissance and detailed survey
preliminary survey, map study, reconnaissance and detailed survey
reconnaissance, map study, preliminary survey and detailed survey
map study, reconnaissance, preliminary survey and detailed survey

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

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