Examining the Environmental, Vehicle, and Driver Factors Associated with Crossing Crashes of Elderly Drivers Using Association Rules Mining

Table 2

Association rules of crossing crashes for elderly and nonelderly drivers.

Antecedent	Types	Support	Confidence	Lift
Elderly drivers
Violation = disobey stop sign	2-product	0.023	1.000	3.446
Violation = disobey traffic lights	2-product	0.027	0.897	3.093
Location = intersection with signal	3-product	0.027	0.972	3.350
Lighting = daylight	4-product	0.023	1.000	3.446
Lighting = daylight	3-product	0.023	0.938	3.231
Weather = clear	4-product	0.018	0.958	3.303
Vehicle = ordinary motor car	3-product	0.014	0.900	3.102
Weather = clear	4-product	0.011	0.933	3.216
Lighting = daylight and location = intersection without signal
Type = light motor truck	4-product	0.037	0.738	2.545
Violation = fail to confirm safety	5-product	0.033	0.754	2.600
Road = dry	5-product	0.033	0.741	2.555
Road = other	4-product	0.017	0.710	2.446
Violation = fail to confirm safety	5-product	0.014	0.731	2.518
Weather = raining	4-product	0.024	0.705	2.428
Violation = fail to confirm safety	5-product	0.021	0.730	2.515
Nonelderly drivers
Violation = disobey stop sign	2-product	0.013	1.000	4.355
Violation = disobey traffic lights	2-product	0.020	0.904	3.936
Vehicle = ordinary motor car	3-product	0.011	0.914	3.982
Location = intersection with signal	3-product	0.020	0.908	3.955

Note. One 6-product rule related to elderly drivers was not shown in Table 2.