Research Article
Engineering Solutions to Enhance Traffic Safety Performance on Two-Lane Highways
Table 5
Variables, values, and actual classification by severity (2007-2008).
| | Variables | Categories | Coding/values | Total | Fatality | Major injury | Minor injury | Property damage | | 519 (100%) | 6 (1.16%) | 8 (1.54%) | 98 (18.88%) | 407 (78.42%) |
| | 1 | Driver’s gender | Man = 1 | 498 (95.95%) | 6 (1.20%) | 7 (1.41%) | 95 (19.08%) | 390 (78.31%) | | Woman = 2 | 21 (4.05%) | 0 (0.00%) | 1 (4.76%) | 3 (14.29%) | 17 (80.95%) |
| | 2 | Driver’s age | <25 = 1 | 38 (7.32%) | 1 (2.63%) | 1 (2.63%) | 7 (18.42%) | 29 (76.32%) | | 25~34 = 2 | 154 (29.67%) | 3 (1.95%) | 3 (1.95%) | 38 (24.68%) | 110 (71.42%) | | 35~44 = 3 | 125 (24.08%) | 1 (0.80%) | 2 (1.60%) | 32 (25.60%) | 90 (72.00%) | | 45~54 = 4 | 61 (11.76%) | 1 (1.64%) | 1 (1.64%) | 17 (27.87%) | 42 (68.85%) | | >54 = 5 | 141 (27.17%) | 0 (0.00%) | 1 (0.71%) | 4 (2.84%) | 136 (96.45%) |
| | 3 | Type of vehicle | Passenger car = 1 | 220 (42.38%) | 1 (0.45%) | 2 (0.91%) | 39 (17.73%) | 178 (80.91%) | | Bus = 2 | 4 (0.77%) | 0 (0.00%) | 0 (0.00%) | 0 (0.00%) | 4 (100.00%) | | Light truck = 3 | 18 (3.47%) | 0 (0.00%) | 0 (0.00%) | 2 (11.11%) | 16 (88.89%) | | Truck = 4 | 231 (44.52%) | 4 (1.73%) | 1 (0.43%) | 45 (19.48%) | 181 (78.36%) | | Tractor trailer = 5 | 6 (1.16%) | 0 (0.00%) | 2 (33.33%) | 2 (33.33%) | 2 (33.33%) | | Tractor = 6 | 36 (6.94%) | 1 (2.78%) | 2 (5.56%) | 10 (27.78%) | 23 (63.88%) | | Cycles = 7 | 4 (0.77%) | 0 (0.00%) | 1 (25.00%) | 0 (0.00%) | 3 (75.00%) |
| | 4 | Vehicle involved | 1 = 1 | 162 (31.21%) | 2 (1.23%) | 1 (0.62%) | 26 (16.05%) | 133 (82.10%) | | 2 = 2 | 340 (65.51%) | 3 (0.88%) | 6 (1.76%) | 69 (20.29%) | 262 (77.07%) | | >2 = 3 | 17 (3.28%) | 1 (5.88%) | 1 (5.88%) | 3 (17.65%) | 12 (70.59%) |
| | 5 | Weather condition | Clear = 1 | 377 (72.63%) | 6 (1.59%) | 5 (1.33%) | 73 (19.36%) | 293 (77.72%) | | Cloudy = 2 | 78 (15.03%) | 0 (0.00%) | 1 (1.28%) | 13 (16.67%) | 64 (82.05%) | | Rainy = 3 | 58 (11.18%) | 0 (0.00%) | 2 (3.45%) | 11 (18.97%) | 45 (77.58%) | | Snowy = 4 | 6 (1.16%) | 0 (0.00%) | 0 (0.00%) | 1 (16.67%) | 5 (83.33%) |
| | 6 | Month | Spring = 1 | 63 (12.14%) | 0 (0.00%) | 0 (0.00%) | 0 (0.00%) | 63 (100.00%) | | Summer = 2 | 144 (27.75%) | 1 (0.69%) | 3 (2.08%) | 30 (20.83%) | 110 (76.40%) | | Autumn = 3 | 154 (29.67%) | 2 (1.30%) | 2 (1.30%) | 30 (19.48%) | 120 (77.92%) | | Winter = 4 | 158 (30.44%) | 3 (1.90%) | 3 (1.90%) | 38 (24.05%) | 114 (72.15%) |
| | 7 | Crash time | 0~5 = 1 | 51 (9.83%) | 0 (0.00%) | 2 (3.92%) | 9 (17.65%) | 40 (78.43%) | | 6~11 = 2 | 189 (36.42%) | 3 (1.59%) | 1 (0.53%) | 37 (19.58%) | 148 (78.30%) | | 12~17 = 3 | 187 (36.02%) | 3 (1.60%) | 3 (1.60%) | 38 (20.33%) | 143 (76.47%) | | 18~23 = 4 | 92 (17.73%) | 0 (0.00%) | 2 (2.17%) | 14 (15.22%) | 76 (82.61%) |
| | 8 | Crash type | Frontal collision = 1 | 139 (26.78%) | 3 (2.16%) | 2 (1.44%) | 38 (27.34%) | 96 (69.06%) | | Side collision = 2 | 37 (7.13%) | 0 (0.00%) | 4 (10.81%) | 4 (10.81%) | 29 (78.38%) | | Rear-end collision = 3 | 74 (14.26%) | 1 (1.35%) | 0 (0.00%) | 9 (12.16%) | 64 (86.49%) | | Scape = 4 | 102 (19.65%) | 1 (0.98%) | 1 (0.98%) | 21 (20.59%) | 79 (77.45%) | | Run-off-road = 5 | 167 (32.18%) | 1 (0.60%) | 1 (0.60%) | 26 (15.57%) | 139 (83.23%) |
| | 9 | Cause | Driver factors = 1 | 480 (92.48%) | 6 (1.25%) | 8 (1.67%) | 89 (18.54%) | 377 (78.54%) | | Vehicle factors = 2 | 10 (1.93%) | 0 (0.00%) | 0 (0.00%) | 1 (10.00%) | 9 (90.00%) | | Environment factors = 3 | 29 (5.59%) | 0 (0.00%) | 0 (0.00%) | 8 (27.59%) | 21 (72.41%) |
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