Highway Engineering
The most economical lighting layout which is suitable for narrow roads is

None of these
Staggered system
Single side lighting
Central lighting system

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

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

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Highway Engineering
The direct interchange ramp involves

diverging to the right side and merging from left
diverging to the left side and merging from left
diverging to the left side and merging from right
diverging to the right side and merging from right

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