Table 2 Details of variables
Variables (encoding) | Injury severity count of the unlicensed PTW driver | ||
|---|---|---|---|
NS | SFI | Total | |
| Â | 4192 (72.6%) | 1585 (27.4%) | 5777 |
1. PTW-related characteristics | |||
1.1 PTW type (Categorical) | |||
Motorcycle = 0 | 3649 (73.0%) | 1350 (27.0%) | 4999 |
Auto-rickshaw = 1 | 543 (69.8%) | 235 (30.2%) | 778 |
1.2 Unlicensed PTW driver gender (Categorical) | |||
Male = 0 | 3832 (72.5%) | 1450 (27.5%) | 5282 |
Female = 1 | 360 (72.7%) | 135 (27.3%) | 495 |
1.3 Unlicensed PTW driver age (Continuous, from 15 to 83 years) | |||
18–35 | 997 (78.7%) | 270 (21.3%) | 1267 |
36–53 | 1844 (73.9%) | 650 (26.1%) | 2494 |
54–70 | 1182 (67.9%) | 559 (32.1%) | 1741 |
>70 | 169 (61.5%) | 106 (38.5%) | 275 |
1.4 Unlicensed PTW driver employment status (Categorical) | |||
Farmer = 0 | 2276 (72.2%) | 875 (27.8%) | 3151 |
Blue-collar = 1 | 226 (66.3%) | 115 (33.7%) | 341 |
White-collar = 2 | 234 (77.2%) | 69 (22.8%) | 303 |
Self-employed = 3 | 1456 (73.5%) | 526 (26.5%) | 1982 |
1.5 Driving behavior of unlicensed PTW driver (Categorical) | |||
No abnormal behavior = 0 | 2166 (83.9%) | 415 (16.1%) | 2581 |
Drunk driving = 1 | 609 (36.8%) | 1044 (63.2%) | 1653 |
Fatigue driving = 2 | 168 (67.2%) | 82 (32.8%) | 250 |
Furious driving = 3 | 701 (98.3%) | 12 (1.7%) | 713 |
Distracted driving = 4 | 548 (94.5%) | 32 (5.5%) | 580 |
2. Crash partner (CP) driver (CPD)-related characteristics | |||
2.1 CP type (Categorical) | |||
Minibus = 0 | 2791 (80.5%) | 674 (19.5%) | 3465 |
Light truck = 1 | 333 (73.2%) | 122 (26.8%) | 455 |
Medium truck = 2 | 119 (61.3%) | 75 (38.7%) | 194 |
Large bus = 3 | 75 (63.6%) | 43 (36.4%) | 118 |
Heavy truck = 4 | 874 (56.6%) | 671 (43.4%) | 1545 |
2.2 CPD gender (Categorical) | |||
Male = 0 | 3746 (71.3%) | 1509 (28.7) | 5255 |
Female = 1 | 446 (85.4%) | 76 (14.6%) | 522 |
2.3 CPD age (Continuous, from 18 to 73 years) | |||
18–35 | 1686 (74.2%) | 586 (25.8%) | 2272 |
36–53 | 2227 (71.2%) | 902 (28.8%) | 3129 |
>54 | 279 (74.2%) | 97 (25.8%) | 376 |
3. Roadway and crash characteristics | |||
3.1 Road functional class (Categorical) | |||
National and provincial road = 0 | 1305 (66.1%) | 668 (33.9%) | 1973 |
Urban road = 1 | 2037 (79.4%) | 529 (20.6%) | 2566 |
Rural road = 2 | 850 (68.7%) | 388 (31.3%) | 1238 |
3.2 Road condition classification (Categorical) | |||
Motorway = 0 | 3118 (73.5%) | 1124 (26.5%) | 4242 |
Non-motorway = 1 | 521 (71.9%) | 204 (28.1%) | 725 |
Mixed traffic lane = 2 | 553 (68.3%) | 257 (31.7%) | 810 |
3.3 Roadway alignment (Categorical) | |||
Planar linear = 0 | 3487 (73.1%) | 1281 (26.9%) | 4768 |
Bend road or rampway = 1 | 705 (69.9%) | 304 (30.1%) | 1009 |
3.4 Crash position (Categorical) | |||
Road section = 0 | 2632 (72.1%) | 1019 (27.9%) | 3651 |
Intersection with signal control = 1 | 828 (73.5%) | 299 (26.5%) | 1127 |
Intersection without signal control = 2 | 732 (73.3%) | 267 (26.7%) | 999 |
3.5 Physical separation of the road (Categorical) | |||
Non-separation = 0 | 2984 (71.7%) | 1177 (28.3%) | 4161 |
Only central separation (type A) = 1 | 803 (70.1%) | 342 (29.9%) | 1145 |
Only motorway and non-motorway separation (type B) = 2 | 167 (84.8%) | 30 (15.2%) | 197 |
Type A and B = 3 | 238 (86.9%) | 36 (13.1%) | 274 |
3.6 Road surface condition (Categorical) | |||
Dry = 0 | 3942 (72.9%) | 1464 (27.1%) | 5406 |
Surface gathered water = 1 | 250 (67.4%) | 121 (32.6%) | 371 |
3.7 Crash type (Categorical) | |||
Head-on crash = 0 | 652 (75.0%) | 217 (25.0%) | 869 |
Rear-end crash = 1 | 539 (62.7%) | 320 (37.3%) | 859 |
Side impact = 2 | 2855 (74.5%) | 978 (25.5%) | 3833 |
Fender-bender = 3 | 146 (67.6%) | 70 (32.4%) | 216 |
4. Environment characteristics | |||
4.1 Month (Categorical, from January = 1 to December = 12) | |||
Spring | 1121 (72.3%) | 430 (27.7%) | 1551 |
Summer | 860 (73.4%) | 312 (26.6%) | 1172 |
Autumn | 1105 (71.1%) | 449 (28.9%) | 1554 |
Winter | 1106 (73.7%) | 394 (26.3%) | 1500 |
4.2 Week (Categorical, from Monday = 1 to Sunday = 7) | |||
Weekday | 3041 (73.2%) | 1114 (26.8%) | 4155 |
Weekend | 1151 (71.0%) | 471 (29.0%) | 1622 |
4.3 Crash time (Categorical, from (0:00–1:00) = 0 to (23:00–24:00) = 23) | |||
Day (9:00–16:59) | 1793 (74.4%) | 617 (25.6%) | 2410 |
Peak (7:00–8:59); (17:00–19:59) | 1259 (74.7%) | 427 (25.3%) | 1686 |
Night (20:00–6:59) | 1140 (67.8%) | 541 (32.2%) | 1681 |
4.4 Weather (Categorical) | |||
Clear = 0 | 3693 (73.1%) | 1362 (26.9%) | 5055 |
Fog = 1 | 297 (70.0%) | 127 (30.0%) | 424 |
Rain and snow = 2 | 202 (67.8%) | 96 (32.2%) | 298 |
4.5 Visibility (Categorical) | |||
Over 200 m = 0 | 2435 (75.2%) | 802 (24.8%) | 3237 |
100–200 m = 1 | 620 (75.9%) | 197 (24.1%) | 817 |
50–100 m = 2 | 609 (66.0%) | 314 (34.0%) | 923 |
Below 50 m = 3 | 528 (66.0%) | 272 (34.0%) | 800 |
4.6 Lighting condition (Categorical) | |||
Daylight = 0 | 2717 (74.2%) | 944 (25.8%) | 3661 |
Dusk and dawn = 1 | 200 (66.2%) | 102 (33.8%) | 302 |
Dark with street lamp = 2 | 660 (76.1%) | 207 (23.9%) | 867 |
Dark without street lamp = 3 | 615 (64.9%) | 332 (35.1%) | 947 |
