Research Article
Exploring the Influence of Truck Proportion on Freeway Traffic Safety Using Adaptive Network-Based Fuzzy Inference System
Table 1
The base information of collected data.
| Statistical data | Range | Mean value | Standard deviation |
| Truck proportion (/h) | 17.6–90.5% | 36.4% | 0.198 | The volume of truck (h) | 82–515 | 180.78 | 61.047 | The volume of vehicle (veh/h/ln) | 240–816 | 553.69 | 145.512 | The mean speed (km/h) | 47.136–118.722 | 88.231 | 12.803 | The average speed difference of truck and small car (km/h) | 7.21–39.519 | 23.749 | 7.664 | Speed standard deviation (km/h) | 10.129–26.065 | 18.609 | 3.534 | Coefficient of variation | 0.12–0.34 | 0.215 | 0.0506 |
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