Research Article
Analysis of Factors Affecting the Severity of Automated Vehicle Crashes Using XGBoost Model Combining POI Data
Table 2
Variables description and distribution.
| Variable | Total (N = 94) | Uninjured (N = 76) | Injured (N = 18) | Distribution (%) | Distribution (%) | Distribution (%) |
| Type of collision | Head-on = 0 | 8.60 | 10.67 | 0.00 | Side swipe = 1 | 15.05 | 16.00 | 11.11 | Rear end = 2 | 64.52 | 62.67 | 72.22 | Broadside = 3 | 11.83 | 10.67 | 16.67 |
| AV state (the AV movement preceding the collision) | Stopped = 0 | 38.71 | 38.67 | 38.89 | Moving = 1 | 61.29 | 61.33 | 61.11 |
| Other vehicle state (other vehicle movement preceding the collision) | Stopped = 0 | 1.08 | 1.33 | 0.00% | Moving = 1 | 98.92 | 98.67 | 100.00 |
| Vehicle damage (describe vehicle damage) | None = 0 | 7.52 | 9.33 | 0.00 | Minor = 1 | 64.52 | 74.67 | 22.22 | Mod = 2 | 26.89 | 14.675 | 77.78 | Major = 3 | 1.08 | 1.33 | 0.00 |
| Driving mode (driving mode preceding the collision) | Conventional = 0 | 52.69 | 54.67 | 44.44 | Autonomous = 1 | 47.31 | 45.33 | 55.56 |
| Accident location | Intersection = 1 | 47.31 | 45.33 | 55.56 | Street = 2 | 35.48 | 44.00 | 0.00 | Highway = 3 | 13.98 | 6.67 | 44.44 | Parking lot = 4 | 3.23 | 4.00 | 0.00 |
| Weather (weather conditions at the time of the accident) | Clear = 1 | 77.42 | 90.67 | 22.22 | Cloudy = 2 | 19.35 | 5.33 | 77.78 | Raining = 3 | 2.15 | 2.67 | 0.00 | Fog/visibility = 4 | 1.08 | 1.33 | 0.00 |
| Lighting (lighting conditions at the time of the accident) | Daylight = 1 | 64.52 | 69.33 | 44.44 | Dusk-dawn = 2 | 2.15 | 1.33 | 5.56 | Dark-street lights = 3 | 33.33 | 29.33 | 50.00 |
| POI_D (the POI diversity evaluation index) | = 0 | 55.91 | 50.67 | 55.56 | = 1 | 38.71 | 33.33 | 33.33 | = 2 | 5.38 | 16.00 | 11.11 |
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