Research Article
Predicting Severity and Duration of Road Traffic Accident
Table 2
Estimation results of severity prediction models.
| Variables | Fatality model | Injury model | Property damage model | SVM | Ordered Probit | SVM | Ordered Probit | SVM | Ordered Probit | Coef. | Z-stat. | Coef. | Z-stat. | Coef. | Z-stat. |
| Dvi | — | — | — | — | — | — | √ | 0.23 | 1.99 | Bi | √ | 0.75 | 8.82 | √ | 0.28 | 4.37 | — | — | — | Ti | √ | 0.64 | 7.93 | √ | 0.29 | 4.61 | — | — | — | Di | — | — | — | — | — | — | √ | 0.11 | 2.00 | Hmi | √ | 0.04 | 1.34 | √ | 0.04 | 1.65 | √ | 0.21 | 1.96 | Tod | √ | 0.12 | 2.94 | √ | 0.04 | 1.21 | — | — | — | Wc | √ | 0.12 | 2.3 | √ | −0.05 | −2.3 | √ | 0.04 | 2.46 | Vd | — | — | — | — | — | — | √ | 0.10 | 5.92 | Tsc | √ | 0.03 | 2.31 | √ | −0.02 | −1.56 | — | — | — | Alh | √ | −0.03 | −1.44 | √ | 0.04 | 2.71 | √ | −0.03 | −2.12 | Alv | √ | −0.11 | −6.88 | √ | 0.06 | 5 | √ | −0.13 | −12.16 | Rsc | — | — | — | √ | 0.11 | 4.03 | — | — | — | Rg | √ | −0.26 | −1.71 | — | — | — | √ | −0.18 | −2.01 | Pc | — | — | — | — | — | — | √ | −0.18 | −2.09 | Vf | √ | 0.73 | 7.70 | — | — | — | √ | 0.13 | 1.98 | Vr | √ | 0.04 | 1.32 | — | — | — | — | — | — | Mvoa | — | — | — | — | — | — | √ | 0.45 | 11.66 | | — | 0.63 | — | — | −0.68 | — | — | 0.06 | — | | — | 2.79 | — | — | 2.36 | — | — | 1.99 | — | | — | — | — | — | 3.71 | — | — | — | — |
| Hit ratio (%) | 89.21 | 89.59 | 86.50 | 86.89 | 59.57 | 62.66 |
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