研究文章
Random-Parameter多元负二项回归建模的影响因素在事故频率崩溃类型
表9
Zero-inflated多元负二项模型估计结果。
|
| 变量1 |
不。2 |
在尾端的估计(t统计) |
Bumping-guardrail估计(t统计) |
其他的估计(t统计) |
Noncasualty估计(t统计) |
伤亡估计(t统计) |
|
| 常数 |
5 |
0.0433 (0.27) |
0.501 (3.07) |
−0.527 (−2.11) |
−0.0191 (−0.12) |
−0.430 (−1.13) |
|
| 交通特征 |
| 交换 |
3 |
- - - - - -3 |
- - - - - - |
−0.422 (−2.91) |
−0.164 (−1.95) |
−0.601 (−2.55) |
| 黑色的斑点 |
5 |
1.057 (11.06) |
0.859 (9.77) |
1.276 (7.17) |
1.196 (9.54) |
1.322 (4.88) |
| AADT |
4 |
0.0000263 (8.66) |
0.00000936 (3.00) |
0.0000126 (2.52) |
0.0000365 (11.55) |
- - - - - - |
|
| 速度特性 |
|
|
5 |
−0.0131 (−3.63) |
−0.00812 (−2.38) |
−0.0140 (−2.63) |
−0.0177 (−4.58) |
−0.0161 (−1.85) |
|
|
5 |
0.0114 (3.31) |
0.00828 (2.45) |
0.0109 (2.09) |
0.0119 (3.25) |
0.0237 (2.45) |
|
|
2 |
0.0210 (3.14) |
- - - - - - |
- - - - - - |
0.0272 (3.82) |
- - - - - - |
|
|
4 |
−0.0190 (−4.09) |
−0.00934 (−2.11) |
−0.0182 (−2.67) |
−0.0221 (−4.40) |
- - - - - - |
|
| 几何特征 |
|
|
1 |
- - - - - - |
- - - - - - |
- - - - - - |
- - - - - - |
0.000251 (2.13) |
|
|
2 |
0.000000361 (3.69) |
- - - - - - |
- - - - - - |
0.000000375 (3.63) |
- - - - - - |
|
|
5 |
0.000588 (10.32) |
0.000468 (8.12) |
0.000755 (8.09) |
0.000753 (11.64) |
0.000748 (6.25) |
|
|
1 |
- - - - - - |
−0.000133 (−2.48) |
- - - - - - |
- - - - - - |
- - - - - - |
|
|
3 |
−0.000357 (−2.51) |
- - - - - - |
- - - - - - |
−0.000423 (−2.83) |
−0.000588 (−1.76) |
|
| 视觉特征 |
|
|
5 |
−0.00540 (−2.78) |
−0.00633 (−2.86) |
−0.0111 (−3.20) |
−0.00706 (−3.44) |
−0.0135 (−2.51) |
|
|
3 |
−0.0860 (−2.13) |
−0.105 (−2.57) |
- - - - - - |
−0.0878 (−2.06) |
- - - - - - |
|
|
总数量的参数:53个;对数似:−14352.888;AIC: 29131.777;BIC: 29674.168;
:19426.561。
|
