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

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

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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 soils having same values of plasticity index, if liquid limit is increased, then

Compressibility, permeability and dry strength increase
Compressibility, permeability and dry strength decrease
Compressibility and permeability increase and dry strength decreases
Compressibility and permeability decrease and dry strength increases

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