Highway Engineering
In case of summit curves, the deviation angle will be maximum when

an ascending gradient meets with a level surface
an ascending gradient meets with a descending gradient
a descending gradient meets with another descending gradient
an ascending gradient meets with another ascending gradient

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Highway Engineering
A traffic rotary is justified where

number of intersecting roads is between 4 and 7
when traffic volume is more than 5000 vehicles per hour
space is limited and costly
when traffic volume is less than 500 vehicles per hour

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

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

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