Research Article
Exploring the Influence of Truck Proportion on Freeway Traffic Safety Using Adaptive Network-Based Fuzzy Inference System
Table 4
Orthogonal experimental design.
| | Test number | Headway time | “Following” Variation | Threshold for entering “following” | Min. headway (front/rear) | Test scheme | Speed difference between small cars and trucks |
| | 1 | 1(0.5) | 1(3) | 1(−9) | 1(0.3) | | 1.853 | | 2 | 3(1.3) | 3(5) | 1 | 3(0.7) | | 1.459 | | 3 | 4(1.7) | 4(6) | 1 | 4(0.9) | | 1.06 | | 4 | 2(0.9) | 2(4) | 1 | 2(0.5) | | 1.594 | | 5 | 2 | 4 | 3(−7) | 1 | | 1.631 | | 6 | 4 | 3 | 2(−8) | 1 | | 1.059 | | 7 | 3 | 2 | 4(−6) | 1 | | 1.474 | | 8 | 1 | 4 | 4 | 3 | | 1.859 | | 9 | 4 | 1 | 4 | 2 | | 1.248 | | 10 | 1 | 3 | 3 | 2 | | 1.854 | | 11 | 2 | 3 | 4 | 4 | | 1.631 | | 12 | 2 | 1 | 2 | 3 | | 1.614 | | 13 | 3 | 1 | 3 | 4 | | 1.471 | | 14 | 3 | 4 | 2 | 2 | | 1.458 | | 15 | 4 | 2 | 3 | 3 | | 1.084 | | 16 | 1 | 2 | 2 | 4 | | 1.856 | | 1.8555 | 1.5465 | 1.4915 | 1.50425 | | | 1.6175 | 1.502 | 1.49675 | 1.5385 | | 1.4655 | 1.50075 | 1.51 | 1.504 | | 1.11275 | 1.502 | 1.553 | 1.5045 | | Excellent level | | | | | | 0.74275 | 0.04575 | 0.0615 | 0.0345 | | Order | |
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