| Variable | Poisson (Log-link) | Negative Binomial (Log-link) | ||
| C | P | C | P | |
| Intercept | −3.92 | <0.01 | −4.17 | <0.01 |
| # of main tracks | 1.49 | <0.01 | 1.68 | <0.01 |
| Posted highway speed Limit | −0.02 | 0.03 | −0.02 | 0.05 |
| Likelihood Ratio Chi-Square | 90.2 | <0.01 | 84.4 | <0.01 |
| AIC | 1176.6 | 1157.4 | ||
| AICC | 1176.6 | 1157.4 | ||
| Deviance | 891.8 | 760.7 | ||