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Table 8 A summary of variables used for regression analysis to crash severity
From: Exploration of the characteristics and trends of electric vehicle crashes: a case study in Norway
Variable | Definition | ICEV (%) | EV (%) |
|---|---|---|---|
Dependent | |||
Severity | 0 if light crash | 84.7 | 86.7 |
1 if severe crash | 15.3 | 13.3 | |
Independent | |||
Weekend | 0 if it occurred on weekdaysa | 76.1 | 82.4 |
1 if it occurred on weekends | 23.9 | 17.6 | |
Time of day | AM peak (7–8 a.m.) | 10.2 | 16.2 |
Daytime (9 a.m.–2 p.m.)a | 32.4 | 29.1 | |
PM peak (3–5 p.m.) | 26.4 | 31.7 | |
Nighttime (6 p.m.–6 a.m.) | 31.1 | 23.0 | |
Settlements | Urban areaa | 37.3 | 56.1 |
Rural area | 62.7 | 43.9 | |
Speed limit | Low-speed (< 50 km/h) | 13.7 | 21.6 |
Middle-speed (≥ 50 and < 80 km/h)a | 52.9 | 59.4 | |
High-speed (≥ 80 km/h) | 33.4 | 19.1 | |
Roadway location | Segmenta | 63.4 | 44.6 |
Junction | 36.6 | 55.4 | |
Presence of medians | Noa | 89.5 | 82.4 |
Yes | 10.5 | 17.6 | |
Visibility | Good visibilitya | 79.8 | 78.4 |
Good visibility—rainfall/snowfall | 14.3 | 15.1 | |
Poor visibility | 5.9 | 6.5 | |
Road surface conditions | Drya | 59.3 | 58.6 |
Wet | 25.1 | 32.4 | |
Snowy/icy | 15.6 | 9.0 | |
Accident category | Cara | 64.0 | 55.8 |
Motorcycle | 16.2 | 11.5 | |
Bike/pedestrian | 19.8 | 32.7 | |