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

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

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Highway Engineering
Select the correct statement.

More the value of CBR, greater thickness of pavement will be required
More the value of group index, less thickness of pavement will be required
All of these
Minimum and maximum values of group index can be 0 and 20 respectively

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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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