Highway Engineering
The provision of traffic signals at intersections

reduces right angled and rear end collisions
reduces rear end collisions but may increase right angled collisions
increases right angled and rear end collisions
reduces right angled collisions but may increase rear end collisions

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

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

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