Table 3.
GWR model of influencing factors on distribution of accidents leading to deaths of motorcyclists in Tehran, 2011–2016.
| Variable | Maximum | The third quartile | Mean | The first quartile | Minimum |
|---|---|---|---|---|---|
| Population density | −0.933 | −0.934 | −0.935 | −0.936 | −0.936 |
| The ratio of illiteracy | 0.258 | 0.257 | 0.256 | 0.255 | 0.255 |
| The ratio of the length of the highways to the total length of the passages | 0.369 | 0.369 | 0.368 | 0.367 | 0.366 |
| The ratio of the length of arterial streets to the total length of the passages | 0.181 | 0.181 | 0.180 | 0.179 | 0.179 |
| Travel attraction | 0.479 | 0.479 | 0.478 | 0.477 | 0.476 |
| Distance traveled | 0.099 | 0.099 | 0.098 | 0.097 | 0.097 |
| Lacking of parking area | −0.383 | −0.384 | −0.385 | −0.386 | −0.387 |
| Level of development | 0.089 | 0.089 | 0.088 | 0.087 | 0.087 |
| Traffic volume | 0.073 | 0.071 | 0.069 | 0.067 | 0.066 |
| Residential land use | −0.330 | −0.331 | −0.332 | −0.332 | −0.334 |
| Commercial use | −0.094 | −0.095 | −0.095 | −0.097 | −0.098 |
| Educational use | 0.169 | 0.167 | 0.165 | 0.163 | 0.161 |
| Administrative use | −0.028 | −0.028 | −0.029 | −0.030 | −0.030 |
| Industrial use | 0.060 | 0.057 | 0.054 | 0.051 | 0.049 |
| Model indices | |||||
| BIC | 67.5 | ||||
| AIC | 129.4 | ||||
| Percent deviance explained | 0.88 | ||||
GWR: geographically weighted regression, AIC: Akaike's information criterion, BIC: Bayesian information criterion.