Research Article
Forecast and Early Warning of Regional Bus Passenger Flow Based on Machine Learning
Table 4
Early warning level of regional bus stops.
| Early warning level | The first level | The second level | The third level | The fourth level |
| Warning interval | 0–0.25 | 0.25–0.50 | 0.50–0.75 | >0.75 | Explanation | Safe | Relatively safe | Relatively danger | Danger |
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