Research Article
Evaluating Railway Operation Safety Situation in China Based on an Improved TOPSIS Method: A Regional Perspective
Table 3
Names, symbols, quantification methods, and units for all situation indicators.
| | Indicator | Symbol | Quantification method | Unit |
| | Number of accidents | | | — | | Number of accidents per unit turnover | | | —/hundred million ton-kilometers | | Accident grades | | | — | | Structure of accident properties | | | — | | Degree of accident correlation | | | — | | The average recovery time of accidents | | | Hour |
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