| 路面等级 |
几何平均值 |
几何平均值 |
| A | 16 | 3.81 |
| B | 64 | 7.61 |
| C | 256 | 15.23 |
| D | 1024 | 30.45 |
| E | 4096 | 60.90 |
| F | 16,385 | 121.80 |
| G | 65,536 | 243.61 |
| H | 262,144 | 487.22 |