Data Collection¶
SUNT uses an Automated Data Collection System (ADCS) integrating four sources:
| Source | Coverage | Key information |
|---|---|---|
| AVL | Regular buses + BRT | Real-time GPS positions |
| AFC | Buses + BRT + Subway | Fare validations (card taps) |
| GTFS | All systems | Static schedules and stop sequences |
| LTI | All systems | Actual trip start/end times |
Collection Period¶
March 1, 2024 – March 31, 2025 (13 months)
Temporal granularity: < 1 minute
Privacy¶
Passenger card IDs in AFC are anonymized using a hash-based, collision-free function. No attribute in the dataset links individual users to personal information. Elderly passengers (≥65 y/o) travel free without cards and are not individually tracked; their presence is modeled via probability distributions.