| Pooled Poisson Model | Fixed effects Poisson Model | Random effect Poisson Model | |
| Variable | Coefficient | Coefficient | Coefficient |
| Dangerousdriving | 0.000707** | 0.0007124** | 0.000709** |
| DriverNegligence | 0.000408** | 0.0004108** | 0.000407** |
| Cardefect | 0.0020841** | 0.0020806** | 0.0020843** |
| Fire | 0.0349749** | 0.0350824** | 0.034981** |
| Cyclist | 0.0038588** | 0.0038268** | 0.0038597** |
| Motorcycle | 0.0010589* | 0.0010498* | 0.0010579* |
| Overspeed | 0.0019193** | 0.0019352** | 0.0019183** |
| Livestockcollection | −0.0319874** | −0.0318558** | −0.0319774** |
| Rumination | −0.0110285** | −0.0110041** | −0.0110385** |
| Roadblocks | −0.0038819** | −0.0038733** | −0.0038839** |
| BadRoads | 0.0023125** | 0.0023114** | 0.0023325** |
| Overtake | 0.00462* | 0.0045785* | 0.00452* |
| Pedestrian | −0.0014673** | −0.001472** | −0.0014683** |
| Pullingoverdevicesroads | −0.0135791** | −0.013567** | −0.0135801 |
| Alcohol | 0.0107738** | 0.0106363** | 0.0107738** |
| ttrend | −0.2130249* | −0.2136283** | −0.2130249** |
| Constant/Intercept | 5.591488* | 5.591488** | |
| /lnalpha | −0.9408104** | −0.9408104** | |
| alpha | 0.3903114* | 0.3903114** | |
| Sample size | 232 | 232 | 232 |
| Group number of regions | 30 | 30 | 30 |
| AIC | 4354.252 | 3860.889 | 4356.232 |
| Log Likelihood (LB) | −2159.126 | −1914.4443 | −2158.126 |