Highway Engineering
Group index method of design of flexible pavement is

An empirical method based on strength characteristics of sub-grade soil
A theoretical method
A semi empirical method
An empirical method based on physical properties of sub-grade soil

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Highway Engineering
With increase in speed of the traffic stream, the maximum capacity of the lane

decreases
first decreases and then increases after reaching a minimum value at optimum speed
first increases and then decreases after reaching a maximum value at optimum speed
increases

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