Information for estimating accident costs due to failures
| Object type | Unit | State | Probability of failure per unit | Probability of accident per failure | Probability of injury per accident per person in train | Probability of fatality per accident per person in train | |
|---|---|---|---|---|---|---|---|
| Bridgea | Metal | Number | 1 | 8 × 10−6 | 0·3 | 0·8 | 0·2 |
| 2 | 3 × 10−4 | ||||||
| 3 | 5 × 10−3 | ||||||
| 4 | 0·05 | ||||||
| Concrete | Number | 1 | 2 × 10−6 | 0·2 | 0·8 | 0·2 | |
| 2 | 2 × 10−4 | ||||||
| 3 | 5 × 10−4 | ||||||
| 4 | 3 × 10−3 | ||||||
| Masonry | Number | 1 | 4 × 10−8 | 0·25 | 0·8 | 0·2 | |
| 2 | 3 × 10−6 | ||||||
| 3 | 3 × 10−4 | ||||||
| 4 | 6 × 10−4 | ||||||
| Track | Number | 1 | 0·0025 | 0·1 | 0·4 | 0·05 | |
| 2 | 0·025 | ||||||
| 3 | 0·075 | ||||||
| 4 | 0·25 | ||||||
| Earthwork | Embankment | Number | 1 | 7 × 10−5 | 0·5 | 0·4 | 0·05 |
| 2 | 8 × 10−4 | ||||||
| 3 | 7 × 10−3 | ||||||
| 4 | 5 × 10−2 | ||||||
| Cutting | Number | 1 | 7 × 10−6 | 0·3 | 0·2 | 0·005 | |
| 2 | 7 × 10−5 | ||||||
| 3 | 4 × 10−3 | ||||||
| 4 | 9 × 10−3 | ||||||
| Switches | Turnout | Number | 1 | 0·01 | 0·1 | 0·5 | 0·05 |
| 2 | 0·10 | ||||||
| 3 | 0·25 | ||||||
| 4 | 0·50 | ||||||
| Object type | Unit | State | Probability of failure per unit | Probability of accident per failure | Probability of injury per accident per person in train | Probability of fatality per accident per person in train | |
|---|---|---|---|---|---|---|---|
| Bridge | Metal | Number | 1 | 8 × 10−6 | 0·3 | 0·8 | 0·2 |
| 2 | 3 × 10−4 | ||||||
| 3 | 5 × 10−3 | ||||||
| 4 | 0·05 | ||||||
| Concrete | Number | 1 | 2 × 10−6 | 0·2 | 0·8 | 0·2 | |
| 2 | 2 × 10−4 | ||||||
| 3 | 5 × 10−4 | ||||||
| 4 | 3 × 10−3 | ||||||
| Masonry | Number | 1 | 4 × 10−8 | 0·25 | 0·8 | 0·2 | |
| 2 | 3 × 10−6 | ||||||
| 3 | 3 × 10−4 | ||||||
| 4 | 6 × 10−4 | ||||||
| Track | Number | 1 | 0·0025 | 0·1 | 0·4 | 0·05 | |
| 2 | 0·025 | ||||||
| 3 | 0·075 | ||||||
| 4 | 0·25 | ||||||
| Earthwork | Embankment | Number | 1 | 7 × 10−5 | 0·5 | 0·4 | 0·05 |
| 2 | 8 × 10−4 | ||||||
| 3 | 7 × 10−3 | ||||||
| 4 | 5 × 10−2 | ||||||
| Cutting | Number | 1 | 7 × 10−6 | 0·3 | 0·2 | 0·005 | |
| 2 | 7 × 10−5 | ||||||
| 3 | 4 × 10−3 | ||||||
| 4 | 9 × 10−3 | ||||||
| Switches | Turnout | Number | 1 | 0·01 | 0·1 | 0·5 | 0·05 |
| 2 | 0·10 | ||||||
| 3 | 0·25 | ||||||
| 4 | 0·50 | ||||||
The table is to be read as follows: when a metal bridge is in state 1, it has a probability of failure of 8 × 10−6. If it fails, there is a probability of 0·3 that there will be a train that will have an accident due to this failure. If there is an accident, there is a 0·8 probability that a person on the train will be injured and a 0·2 probability that a person will lose their life
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