VDV-Real Time Data Interface (using SIRI)

Real Time Data Interface – VDV Recommendation 453
- Connection protection
- Reference data service for transfer protection (REF-CP)
- Process data service for transfer protection (CP)
- Dynamic passenger information
- Reference data service for passenger information (REF-DPI)
- Process data service for passenger information (DPI)
- VIS Visualisation
- GM General message service
Real Time Data Interface – VDV Recommendation 454
- Schedule Information
- Reference data service for timetable information (REF-SIS)
- Process data service for timetable information (SIS)
The VDV recommendations with the common title “Real Time Data Interface” – the above mentioned numbers 453 and 454 as well as 459 “Real Time Data Interface for Demand-Controlled Transport” (only in German) make use of the standard CEN/TS 15531 ‘Service Interface for Real Time Information (SIRI)’. They represent the subset of the CEN standard to be used in Germany.
From the different communication methods described in SIRI in VDV 453 the communication method “publish/subscribe” is chosen for the use in the VDV-context.
Furthermore the VDV recommendations reduce the number of optional data elements described in SIRI to a well defined selection, which has proven its efficiency in numerous real time projects in Germany and neighbouring countries.

Target users
Transport Companies and authorities
Implementation scope
Connecting databases from different companies and suppliers
Functionalities
Transfer of real time data for passenger information, connection protection, operation monitoring and Network timing information. (Transmodel parts 1, 2, 3, 4, 6)
Usage
It is widely used in the German speaking countries, but also in other regions of the world.
VDV-Interfaces for Planned Data


Target users
Transport Companies and authorities
Implementation scope
Connecting databases from different companies and suppliersFunctionalities
VDV 452 uses the following parts of Transmodel:
- Network topology
- Vehicle and Driver Schedules
- Timetables
- Passenger Information