Optima Public Transport (PuT) ETA provides advanced functions for public transport services:
- Estimated Time of Arrival (ETA) service for accurate information about public transport vehicle arrival at the stops.
- Transfer alert service to generate automatic alerts about trip-trip, trip-route or route-route transfers.
- Public transport event management service to deal with lines, trips, or stops suppression in public transport services.
- Vehicle location service to geolocalize public transport services.
In order to provide its services, PuT ETA starts from a planned schedule. This schedule is updated in real-time by a Schedule Update Process (SUP). The scheduler is continuously kept up-to-date by using information coming from a variety of sources:
- Current vehicle position.
- Traffic forecast data as produced by TRE ( → Traffic Real-time Equilibrium (TRE)).
- Current traffic states after data fusion performed by Harmonizer ( → Harmonizer).
- Private Transport (PrT) events that affect the speed on the streets on which public transport is monitored. Both planned events (such as roadworks) and unplanned events (such as accidents) are considered.
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Public transport events defined as:
- Line suppressions.
- Trip suppressions.
- Stop suppressions.
Important: The service is tested to work well when the acquired feed covers the services of a single city, as in this case the identifiers for vehicles, lines, bus stops are unique. The case when identifiers are not unique is not managed.
Optima provides also a PuT API to handle all the necessary functions (→ Public transport API).
Important: PuT events are not used by TRE (→ Traffic Real-time Equilibrium (TRE)).
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