Highway Engineering
The maximum number of vehicles beyond which the rotary may not function efficiently is

5000 vehicles per hour
500 vehicles per day
500 vehicles per hour
5000 vehicles per day

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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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