Research Article
Monthly Attenuation Prediction for Asphalt Pavement Performance by Using GM (1, 1) Model
Table 11
Measured and predicted PCI for three typical roads of the trunk highway in Hunan Province.
| | Measured and predicted PCI | Line 1 measured value | Line 1 predicted value | Relative error (%) | Line 2 measured value | Line 2 predicted value | Relative error (%) | Line 3 measured value | Line 3 predicted value | Relative error (%) |
| Early 2012 | — | | | — | | | 100 | 100 | | Early 2013 | 100 | 100 | | 100 | 100 | | 98.24 | 98.24 | 0 | Early 2014 | 98.14 | 98.62 | −0.489 | 97.59 | 97.59 | 0 | 93.35 | 93.05 | 0.323 | Early 2015 | 90.57 | 90.53 | 0.039 | 90.89 | 91.46 | −0.627 | 88.54 | 88.22 | 0.360 | Early 2016 | 83.43 | 83.52 | −0.104 | 86.79 | 85.54 | 1.444 | 81.89 | 83.47 | −1.932 | Early 2017 | 76.93 | 76.89 | 0.055 | 81.41 | 82.11 | −0.866 | 77.86 | 76.88 | 1.254 | Early 2018 | 70.86 | 70.86 | 0 | 77.31 | 77.33 | −0.023 | 72.90 | 72.91 | −0.019 | Early 2019 | | 65.23 | | | 73.74 | | | 68.01 | |
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