Research Article
Prediction Methods for Routine Maintenance Costs of a Reinforced Concrete Beam Bridge Based on Panel Data
Table 3
Summary of actual and predicted costs based on nonlinear regression and test results.
| Project | Age (years) | Bridge length (km) | Number of lanes | Predicted value | Actual value |
| Shang Man | 2016 | 8 | 37.85 | 4 | 692160 | 424724 | 2017 | 9 | 37.85 | 4 | 721450 | 818112 | Shang Jie | 2016 | 9 | 45.34 | 6 | 1296322 | 1463289 | 2017 | 10 | 45.34 | 6 | 1351179 | 1998922 | Xi Shang | 2016 | 5 | 56.13 | 6 | 1359648 | 1845905 | 2017 | 6 | 56.13 | 6 | 1417186 | 1464380 | An Chuang | 2016 | 6 | 75.966 | 4 | 1278673 | 1233239 | 2017 | 7 | 75.966 | 4 | 1332784 | 1130645 | Results of the Wilcoxon signed-rank test | Correlation coefficient | Statistical significance of the correlation coefficient | Statistical significance of the Wilcoxon signed-rank test | 0.83 | 0.01 | 0.44 |
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