Highway Engineering
Centre line markings are used

to designate proper lateral placement of vehicles before turning to different directions
to designate traffic lanes
in roadways meant for two way traffic
to indicate that overtaking is not permitted

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

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

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Highway Engineering
For a constant value of coefficient of lateral friction, the value of required super-elevation increases with

decrease in both speed and radius of curve
decrease in speed and with increase in radius of curve
increase in speed and with decrease in radius of curve
increase in both speed and radius of curve

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