README.md

---
license: cc-by-nc-sa-4.0
language:
- en
pretty_name: SurvCancel
tags:
- survival-analysis
- dynamic-survival-analysis
- transportation
- demand-responsive-transit
- ride-pooling
- time-series
- jsonl
configs:
- config_name: default
  data_files:
  - split: train
    path: train-*.jsonl
---

# SurvCancel

SurvCancel is an anonymized longitudinal dataset for dynamic passenger
cancellation prediction in on-demand ride-sharing systems. Each JSONL record is
one focal order with static trip attributes, a terminal outcome, and an ordered
sequence of pre-pickup system snapshots. Snapshots are sampled every 10 seconds
and include the focal order state, surrounding active orders, available
vehicles, and the matched vehicle when present.

This release is intentionally flat: the four public region shards are exposed
as one Hugging Face `train` split. Benchmark train/validation/test partitions
are constructed by the accompanying code at the order level.

## Release Statistics

The release contains 173,037 focal orders and 7,944,171 temporal snapshots.

| Region shard | Days | Orders | Snapshots | Pre-match cancel | Matched | Post-match cancel | Completed |
|---|---:|---:|---:|---:|---:|---:|---:|
| R1 | 38 | 60,548 | 2,717,147 | 26,511 | 34,037 | 10,987 | 23,050 |
| R2 | 72 | 6,518 | 240,075 | 310 | 6,208 | 872 | 5,336 |
| R3 | 72 | 42,106 | 2,099,571 | 13,404 | 28,702 | 7,667 | 21,035 |
| R4 | 72 | 63,865 | 2,887,378 | 10,449 | 53,416 | 10,651 | 42,765 |
| **Total** | -- | **173,037** | **7,944,171** | **50,674** | **122,363** | **30,177** | **92,186** |

## Files

- `train-R1.jsonl`, `train-R2.jsonl`, `train-R3.jsonl`,
  `train-R4.jsonl`: public region shards
- `sample/sample_records.jsonl`: small sample for smoke tests
- `SCHEMA.md`: field-level schema


## Loading With `datasets`

```python
from datasets import load_dataset

dataset = load_dataset(
    "survcancel-anonymous/SurvCancel",
    split="train",
    streaming=True,
)
```

Load one region directly:

```python
from datasets import load_dataset

r1 = load_dataset(
    "json",
    data_files="hf://datasets/survcancel-anonymous/SurvCancel/train-R1.jsonl",
    split="train",
    streaming=True,
)
```

## Anonymization

Identifiers are replaced with salted HMAC-SHA256 surrogate strings:

- `order_id` -> `ord_*`
- `vehicle_id` and `matched_vehicle_id` -> `veh_*`
- `region_id` -> `reg_*`

The same original identifier in the same namespace maps to the same surrogate.
The private salt and source-to-surrogate mappings are not released. Coordinates
are standardized planar coordinates, not raw latitude/longitude.

## Intended Use

This dataset is intended for academic and non-commercial research on survival
analysis, dynamic event prediction, demand-responsive transportation,
ride-pooling, and cancellation or pickup time-to-event modeling.

## License

This dataset is released under the Creative Commons Attribution-NonCommercial-
ShareAlike 4.0 International License (CC BY-NC-SA 4.0).