Analysis of Rear-End Crash on Thai Highway: Decision Tree Approach
Table 3
Descriptive statistics of continuous variables.
Driver exposure
Fatal injury
Not-at-fault
At-fault
Fatal crash
Nonfatal crash
Mean
Std. Dev.
Min.
Max.
Mean
Std. Dev.
Min.
Max.
Mean
Std. Dev.
Min.
Max.
Mean
Std. Dev.
Min.
Max.
Person_age
38.6
14.0
9.0
86.0
38.0
13.9
11.0
85.0
39.8
14.3
12.0
86.0
37.8
13.8
9.0
85.0
Veh_involve
2.2
0.5
2.0
8.0
2.4
0.8
2.0
8.0
2.3
0.7
2.0
7.0
2.3
0.7
2.0
8.0
AADT60
33,318
53,089
183
270,050
33,779
52,363
163
270,050
26,583
39,286
483
270,050
35,943
56,342
163
270,050
PerCTruck
16.4
10.6
0.0
68.0
17.0
10.8
0.0
68.0
18.2
11.9
1.1
68.0
16.2
10.2
0.0
59.4
Note: Person_age = age of deriver; Veh_involve = number of vehicle involvement; AADT60 = average annual traffic volume on 2017; PerCTruck = average truck volume (%).
