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

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

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Highway Engineering
Length of a vehicle affects

width of traffic lanes
extra width of pavement and minimum turning radius
clearance to be provided under structures such as overbridges, under-bridges etc.
width of shoulders and parking facilities

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