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| 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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