Highway Engineering
Group index method of design of flexible pavement is

An empirical method based on physical properties of sub-grade soil
A semi empirical method
An empirical method based on strength characteristics of sub-grade soil
A theoretical method

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Highway Engineering
The effect of grade on safe overtaking sight distance is

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

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