Highway Engineering
The most efficient traffic signal system is

alternate system
simultaneous system
flexible progressive system
simple progressive system

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

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