Highway Engineering
The direct interchange ramp involves

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

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Highway Engineering
When the speed of traffic flow becomes zero,then

traffic density and traffic volume both attain maximum value
traffic density attains maximum value whereas traffic volume becomes zero
traffic density becomes zero whereas traffic volume attains maximum value
traffic density and traffic volume both become zero

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Highway Engineering
If b is the wheel track of a vehicle and h is the height of centre of gravity above road surface, then to avoid overturning and lateral skidding on a horizontal curve, the centrifugal ratio should always be

less than b/2h and greater than co-efficient of lateral friction
greater than b/2h and also greater than coefficient of lateral friction
greater than b/2h and less than co-efficient of lateral friction
less than b/2h and also less than co-efficient of lateral friction

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Highway Engineering
Length of a vehicle affects

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

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