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

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
decrease in both speed and radius of curve

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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
A traffic rotary is justified where

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

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