Overview
ISO 22741-1:2022 - "Intelligent transport systems - Roadside modules AP‑DATEX data interface - Part 1: Overview" is the introductory, normative part of the ISO 22741 series. It defines the common rules, terminology and architecture used by subsequent parts that standardize data exchange for roadside field devices (traffic signals, message signs, weather stations, traffic sensors, C‑ITS roadside equipment, etc.). Part 1 sets out how AP‑DATEX conventions are applied to manage, monitor, configure and control field devices and provides core normative content that applies across the series.
Key topics and technical requirements
- Scope & purpose: Standardizes data concepts and exchange rules for intelligent transport systems (ITS) roadside modules and field‑to‑centre or field‑to‑field communications.
- Terminology & conventions: Defines common terms, ASN.1 presentation conventions and symbols to be used across the series.
- Architecture: Maps ISO 22741 services to ITS architectural services (see ISO 14813‑1) and explains AP‑DATEX usage scenarios.
- Conformance model: Explains how user needs, features and requirements are structured and traced; conformance codes (M = mandatory, O = optional) and option groups guide implementers.
- Data structures: Annex A provides normative data packet structures used by features defined in the series.
- Dialogues: Specifies generic dialogues used across parts - e.g., requesting information, publication of information - that implementations should support.
- Security: Discusses security considerations applicable to all conformant devices, including authentication, encryption and security recommendations; the abbreviations list references DTLS, TLS and IPsec as related transport/security technologies.
Practical applications
- Enables interoperable management and control of roadside modules by traffic management centres.
- Supports open procurement and non‑proprietary expansion of ITS deployments, reducing cost and deployment time.
- Facilitates device manufacturers, integrators and agencies in implementing consistent monitoring, configuration and control interfaces for:
- Traffic signal controllers
- Variable message signs
- Roadside sensors and weather stations
- C‑ITS roadside units and connected infrastructure
Who should use this standard
- ITS architects and system designers
- Traffic management authorities and operators
- Field device manufacturers and firmware developers
- Systems integrators and procurement/specification teams
- ITS standards and compliance assessors
Related standards
- ISO 15784‑3 - AP‑DATEX application profile for roadside modules (protocol expectations)
- ISO 14827‑2 - DATEX‑ASN data interfaces between transport centres
- ISO 14813‑1 - ITS architectural services referenced by ISO 22741
Keywords: ISO 22741-1:2022, Intelligent Transport Systems, AP‑DATEX, roadside modules, field devices, DATEX‑ASN, data interface, ITS security, conformance.