Research Article
Bus Travel Time Deviation Analysis Using Automatic Vehicle Location Data and Structural Equation Modeling
Table 2
Model fit measures for the original and modified SEM models.
| Measure name | Acceptable level | Original model | Modified Model A | Modified Model B |
| Chi-square | The smaller the nonsignificant () value the better | 96.500 () | 78.066 () | 21.399 () | Ratio of Chi-square to the degrees of freedom (df) | reflects a good model fit | 5.676 | 4.337 | 1.783 | Goodness-of-fit (GFI) | GFI > 0.95 reflects a good model fit | 0.884 | 0.906 | 0.971 | Adjusted GFI (AGFI) | AGFI > 0.95 reflects a good model fit | 0.754 | 0.812 | 0.931 | Root-mean-square error of approximation (RMSEA) | RMSEA < 0.05 indicates a good model fit 0.05~0.08 indicates reasonable fit | 0.150 | 0.127 | 0.061 |
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