Meet the historical train-card dataset
The new dataset has train-wise cards and station-wise cards. A train card names one service number, its origin operating weekdays and an ordered sequence of station calls. Each call contains cumulative distance, arrival, departure and a journey-day indication. Leading zeros in train numbers are retained as part of the string identifier.
| 02201 station | Distance km from origin | Arrival | Departure | Journey day |
|---|---|---|---|---|
| Kolkata | 0 | — | 20:00 | 1 |
| Kharagpur | 136 | 22:15 | 22:20 | 1 |
| Bhubaneswar | 459 | 03:30 | — | 2 |
Distance 459 is from Kolkata, not from Kharagpur. The Kharagpur-to-Bhubaneswar leg is 459−136 = 323 km. A missing origin arrival or final departure is not a clock time of zero. The return card 02202 has a different total distance, 522 km, so do not force symmetry between paired cards.
The interactive train material uses ten visually verified original cards with 57 stop rows. It is a teaching subset, not every train in the complete supplied collection. These are historical course records, not a current travel timetable or availability service. The paired numbers describe opposite-direction services; they do not prove which physical rolling stock is used.
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What does cumulative distance mean?
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Distance since that particular train’s origin. Subtract cumulative values to obtain an intermediate leg length.
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Is — at an endpoint the same as 00:00?
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No. It means that arrival or departure is not applicable on that service card.
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Why preserve 02201 rather than storing only 2201?
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The card’s identifier includes the leading zero. Treat service IDs consistently when joining records.