Table 3.
Estimation and assessment results for the spatial generalized ordered logit model.
| Variable | Latent Severity Propensity | Threshold between Median and Severe Crash Levels | ||||
|---|---|---|---|---|---|---|
| Mean | 90% BCI a | 95% BCI | Mean | 90% BCI | 95% BCI | |
| Constant | 2.7 | (1.35, 3.99) | (1.20, 4.18) | 1.73 | (1.30, 2.13) | (1.23, 2.21) |
| Precipitation | 0.04 | (0.004, 0.08) | (−0.01, 0.09) | 0.13 | (0.03, 0.25) | (0.02, 0.28) |
| Rear-end crash | −2.53 | (−2.82, −2.24) | (−2.88, −2.19) | −0.80 | (−1.04, −0.57) | (−1.09, −0.53) |
| Angle crash | −1.84 | (−2.19, −1.50) | (−2.27, −1.44) | −0.81 | (−1.09, −0.55) | (−1.15, −0.50) |
| Professional driver | 2.23 | (1.45, 3.11) | (1.33, 2.29) | 0.33 | (0.06, 0.60) | (0.004, 0.65) |
| Coach | 0.48 | (0.23, 0.93) | (−0.05, 1.00) | — | — | — |
| Other vehicle | 0.71 | (0.30, 1.11) | (0.23, 1.18) | — | — | — |
| Non-local vehicle | 0.28 | (0.01, 0.57) | (−0.06, 0.62) | — | — | — |
| EMS response time | 0.03 | (0.025, 0.043) | (0.024, 0.045) | — | — | — |
| Horizontal curvature | 0.13 | (0.03, 0.23) | (0.01, 0.25) | — | — | — |
| Vertical grade | — | — | — | −0.24 | (−0.38, −0.11) | (−0.41, −0.07) |
| Afternoon | — | — | — | 0.42 | (0.16, 0.68) | (0.11, 0.75) |
| Evening | −0.43 | (−0.81, −0.02) | (−0.89, 0.05) | — | — | — |
| sd() b | 0.54 | (0.36, 0.80) | (0.32, 0.84) | — | — | — |
| 1684 | — | — | — | — | — | |
| 64 | — | — | — | — | — | |
| DIC | 1748 | — | — | — | — | — |
| CA | 76% | — | — | — | — | — |
a BIC: Bayesian credible interval; sd() b denotes the standard deviation of the spatial term.