Highway Engineering
The provision of traffic signals at intersections

increases right angled and rear end collisions
reduces right angled collisions but may increase rear end collisions
reduces rear end collisions but may increase right angled collisions
reduces right angled and 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 decrease and dry strength increases
Compressibility and permeability increase and dry strength decreases
Compressibility, permeability and dry strength increase
Compressibility, permeability and dry strength decrease

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

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

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