ISO TS 19091-2019 PDF

Full title and description

Intelligent transport systems — Cooperative ITS — Using V2I and I2V communications for applications related to signalized intersections. This technical specification defines message formats, data structures and data elements to support vehicle-to-infrastructure (V2I) and infrastructure-to-vehicle (I2V) exchanges aimed at improving safety, mobility and environmental efficiency at signalised intersections.

Abstract

ISO/TS 19091:2019 specifies the messages and information elements (notably SPaT, MAP, SSM and SRM-related content) and provides traceability from use cases to requirements and to message/data definitions. The document contains the base specification and annexes with use cases, requirement traceability matrices and message requirements intended for roadside equipment and vehicle interface implementations. Applications' internal algorithms and system architectures are outside the scope.

General information

• Status: Published.
• Publication date: June 2019 (2019-06).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 03.220.20 (Road transport); 35.240.60 (IT applications in transport).
• Edition / version: Edition 2 (2019).
• Number of pages: 233 pages (English edition as published by ISO).

Scope

Defines the content, structure and semantics of V2I and I2V messages for applications related to signalized intersections — specifically supporting SPaT (Signal Phase and Timing), MAP (intersection topology), SSM (Signal Status Message) and SRM (Signal Request Message) concepts — and supplies use cases, information requirements and traceability to message definitions. The standard addresses the interface between roadside equipment and vehicles; it does not define specific application algorithms or prescribe overall system architecture.

Key topics and requirements

• Standardized message formats and data element definitions for SPaT, MAP, SSM and SRM to enable interoperable V2I/I2V exchanges.
• Traceability from use cases to derived information requirements and to concrete message/data structures.
• Functional model and architectural considerations for roadside-vehicle message interactions (informative guidance).
• Use-case descriptions covering safety, mobility/sustainability and priority/pre-emption (for example public-transport signal priority).
• Normative references and interoperability considerations with existing message sets (e.g., ASN.1/UPER encodings commonly used in V2X message set standards).

Typical use and users

Adopted by traffic authorities, roadside-equipment manufacturers, traffic signal controller vendors, automotive OEMs and Tier-1 suppliers, ITS integrators and researchers to implement interoperable V2I/I2V capabilities at signalized intersections (for safety warnings, signal priority, platooning support and eco-driving advisory services). It is also used by test and certification bodies when validating SPaT/MAP implementations.

Related standards

Closely related to other V2X and ITS message standards including SAE J2735 (V2X message set dictionary, MAP/SPaT message definitions) and ETSI/EN ITS message specifications (which define CAM/DENM and reference MAP/SPaT mappings). ISO/TS 19091:2019 supersedes the 2017 edition (ISO/TS 19091:2017). The specification is part of the broader Cooperative ITS work under ISO/TC 204 and interoperates with regional and domain message-set conventions.

Keywords

V2I, I2V, SPaT, MAP, SRM, SSM, Cooperative ITS, intelligent transport systems, intersection signalling, message set, data elements, ISO/TC 204.

FAQ

Q: What is this standard?

A: ISO/TS 19091:2019 is an ISO technical specification that defines V2I/I2V message content and data structures for applications related to signalized intersections (SPaT, MAP, SSM, SRM) to support interoperable Cooperative ITS exchanges.

Q: What does it cover?

A: It covers message definitions, data elements, use cases, traceability from use cases to requirements, and informative guidance on functional models and message interactions between roadside equipment and vehicles; it does not specify application internal algorithms or full system architectures.

Q: Who typically uses it?

A: Traffic authorities, ITS equipment vendors, vehicle OEMs and suppliers, integrators, testing and certification organizations, and researchers working on cooperative ITS deployments and intersection-related V2X services.

Q: Is it current or superseded?

A: The 2019 edition (Edition 2) is the published, current edition that replaced the withdrawn 2017 edition; ISO lists the 2019 edition as published (review stage: to be revised as applicable by ISO periodic review). Users should check ISO or national standards bodies for any later revisions or amendments.

Q: Is it part of a series?

A: It forms part of the Cooperative ITS family of standards developed under ISO/TC 204 and is used alongside other regional and international message-set standards (for example SAE J2735 and ETSI ITS message specifications) to enable interoperable V2X services.

Q: What are the key keywords?

A: V2I, I2V, SPaT, MAP, Signal Phase And Timing, Signal Request Message (SRM), Signal Status Message (SSM), Cooperative ITS, intersection communications, message set.