TS 15531: Service Interface for Real-Time Information (SIRI)
| Source Element | Destination Element | Flow |
|---|---|---|
| Transit Management System | IT Trip Planner, OneBusAway, Google Transit .etc | transit and fare schedules |
| IT Trip Planner, OneBusAway, Google Transit .etc | transit probe data | |
| IT Trip Planner, OneBusAway, Google Transit .etc | transit schedule adherence information | |
| Lacey Traffic Management System | transit probe data | |
| Olympia Traffic Management System | transit probe data |