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

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

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

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