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
The effect of grade on safe overtaking sight distance is

to decrease it on both descending and ascending grades
to increase it on descending grades and to decrease it on ascending grades
to increase it on both descending and ascending grades
to decrease it on descending grades and to increase it on ascending grades

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

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

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