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

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

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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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