Overview
ISO/TR 4445:2021 - Intelligent transport systems - Mobility integration - Role model of ITS service application in smart cities defines a common role model and conceptual framework for exchanging ITS (intelligent transport systems) data between vehicles, transport services and smart city platforms. The technical report focuses on secure ITS interfaces and a generic architecture to support cooperative ITS service applications, providing guidance for service definition, operations, regulatory oversight and procedure taxonomy. It is intended as a neutral platform for smart city instantiation rather than a collection of detailed use cases.
Key topics and technical scope
ISO/TR 4445:2021 covers the following technical topics and requirements:
- Framework for cooperative ITS service applications - common platform and service definition principles for mobility integration in smart cities.
- Concept of operations (ConOps) - goals, policies, stakeholder interactions, responsibilities and operational processes.
- Role model architecture - conceptual roles and actors (application service actors, service providers, onboard equipment (OBE) installer/maintainer, vehicle user).
- Regulatory and approval aspects - appointment of approval authorities, service approval and OBE approval processes.
- Security and identity - Security Credential Management System / Public Key Infrastructure (PKI), certification authority and credential lifecycle considerations.
- Data management - big data management entities, data aggregators and ITS data presentation/interchange models (see informational Annex A).
- Communications architecture, QoS and testing - communications architecture options, quality of service requirements, test requirements, marking/labeling and packaging expectations.
- Taxonomy of procedures and references - organization of generic procedures and references to key ITS standards (e.g., ISO 15638 series).
Practical applications
ISO/TR 4445 provides practical value for designing interoperable ITS and smart city integrations:
- Enables secure data exchange between connected vehicles, infrastructure and city platforms.
- Guides development of cooperative mobility services (real-time traffic management, multimodal integration, connected automated driving support).
- Supports procurement and regulatory activities by clarifying approval, certification and operational roles.
- Helps architects define data pipelines for big data management, aggregation and shared mobility services.
Who should use this standard
- City planners and smart city program managers
- Transport authorities and regulators
- ITS solution architects and system integrators
- Vehicle OEMs and onboard equipment (OBE) vendors
- Cybersecurity and PKI providers for transport
- Test labs and certification bodies
Related standards
- ISO 15638 series (service framework for ITS)
- Other ISO/TC 204 and ISO/TC 22 work on ITS and in‑vehicle systems
ISO/TR 4445:2021 is a practical reference for stakeholders implementing interoperable, secure ITS service applications that integrate mobility with smart city platforms.