Q.

The unevenness index for a good pavement surface of high speed should be ___________

A. 1500mm/km
B. 2500mm/km
C. 3500mm/km
D. 4500mm/km
Answer» A. 1500mm/km
Explanation: the unevenness index for a good pavement surface should be kept as low as possible, because they may cause discomfort to passengers and increase the rate of accidents.
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