状态 因子 | 很可靠(1) | 可靠(2) | 相对可靠(3) | 不可靠(4) | 很不可靠(5) |
交通道路法规 | 1 | 0.9 ≤ X < 1 | 0.8 ≤ X < 0.9 | 0.6 ≤ X < 0.8 | X < 0.6 |
路面拥挤度 | 0 < X ≤ 2 | 2 < X ≤ 4 | 4 < X ≤ 6 | 6 < X ≤ 8 | 8 < X ≤ 10 |
路面摩擦系数 | X > 0.8 | 0.6 < X ≤ 0.8 | 0.4 < X ≤ 0.6 | 0.2 < X ≤ 0.4 | X ≤ 0.2 |
车速/(km/h) | X ≤ 60 | 60 < X ≤ 90 | 90 < X ≤ 120 | 120 < X ≤ 150 | X > 150 |
温度/℃ | 15 < X ≤ 25 | 7 < X ≤ 15 25 < X ≤ 29 | 4 < X ≤ 7 29 < X ≤ 33 | 1 < X ≤ 4 33 < X ≤ 37 | X ≤ 1 X > 37 |
照明/lx | X > 110 | 90 < X ≤ 110 | 80 < X ≤ 90 | 50 < X ≤ 80 | X ≤ 50 |
可视距离/m | 0 < X ≤ 90 | 300 < X ≤ 500 | 150 < X ≤ 300 | 50 < X ≤ 150 | X ≤ 50 |