Overview
ISO/TR 21734-3:2024 - Intelligent transport systems: Performance testing for connectivity and safety functions of automated driving buses in public transport - Part 3: Service framework and use cases defines a general service framework and component descriptions for operating automated driving buses (ADBs) in public transport networks. The Technical Report explains how ADBs (SAE Level 4 or higher) interact with the monitoring and control (MC) centre, IoT infrastructure, smart bus stations and passengers, and it documents representative use cases to support performance testing of connectivity and safety functions.
Key topics and technical scope
The document focuses on practical components and operational scenarios rather than prescriptive vehicle-level design. Major topics include:
- ADB service components: roles and interactions of ADBs, MC centre, IoT-enabled roadside infrastructure, smart bus stations (station kiosk), and passengers.
- Service operations: predefined-route and on‑demand operation modes, including boarding, alighting and route management.
- Fare management & identification: station kiosk and mobile application roles for ticketing, prepaid and deferred payment models, reservations and billing flows.
- Security: identification of assets to protect, general security criteria and public‑interest considerations relevant to ADB services and connectivity.
- Emergency response: procedures and messages for accidents, autonomous system errors and in‑vehicle emergencies (emergency event messages).
- Transport information provision: information services for safe ADB operation and communication between components.
- Normative linkage: references ISO 21734-1 for the general performance testing framework.
The report also contains illustrative use cases (e.g., Use case 1‑1 predefined route, Use case 1‑2 on‑demand, fare handling, emergency scenarios) and an informative annex summarizing field test activities (example: Republic of Korea).
Practical applications and users
ISO/TR 21734-3:2024 is intended to support:
- Public transport operators implementing ADB services and service-level processes.
- City and transport authorities defining operational requirements, safety oversight and procurement criteria.
- Vehicle OEMs and system integrators designing vehicle connectivity and interfaces with MC centres and IoT infrastructure.
- Test laboratories and certification bodies developing performance tests for connectivity and safety functions.
- Technology providers (IoT, fare systems, station kiosks, mobile apps) aligning APIs and operational behaviour to standard use cases.
Related standards
- ISO 21734-1: Intelligent transport systems - Performance testing for connectivity and safety functions of ADBs - Part 1: General framework (normative reference).
Keywords: ISO/TR 21734-3:2024, automated driving buses, ADB, intelligent transport systems, performance testing, connectivity, safety functions, public transport, IoT infrastructure, monitoring and control centre, smart bus station.