Research Article
Do Expressway Interchanges Increase Crash Injury Severities? Insights Using Temporal Instability and Unobserved Heterogeneity
Table 6
Probability difference between different years based on the NIAC model.
| Prediction year Base year | NIAC | 2018 | 2019 | No injury | Minor injury | Severe injury | No injury | Minor injury | Severe injury |
| 2017 | 0.0385 | −0.0124 | −0.0261 | 0.0181 | 0.0097 | −0.0278 | 2018 | — | — | — | −0.0156 | 0.0102 | 0.0054 |
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