ISO 24311:2024

Overview

ISO 24311:2024 - Intelligent transport systems - Mobility integration - 'Controlled zone' management for urban vehicle access restrictions (UVARs) using C-ITS - specifies a standardized toolkit and data model for managing road traffic in Controlled Zones (CZ) using geofencing and C-ITS. The core of the standard is the Controlled Zone Data Dictionary (CZDD), which enables CZ managers and ITS systems to convey:

• the CZ geographical boundaries (CZ area),
• access conditions and exemptions,
• time windows when restrictions apply.

The purpose is to allow potential CZ users (e.g., vehicles, navigation systems, fleet management) to perform pre‑trip planning or ad‑hoc re‑routing. The standard includes illustrations, guidelines, message definitions (including an ASN.1 module), and Local Dynamic Map (LDM) data object guidance. Enforcement mechanisms are explicitly out of scope.

Key Topics and Requirements

• Controlled Zone Data Dictionary (CZDD): standardized data frames to describe CZ areas, access conditions, exemptions and time windows.
• CZ Manager concept: roles and data flows for the entity that publishes CZ information.
• Geofencing methodology: virtual geographic boundaries for CZ detection and triggers.
• Access conditions & exemptions: structured representation of who, when and under what conditions access is permitted.
• Routing paradigms and resultant behaviour: guidance for how IVS and routing systems should respond to CZ data (pre-trip and in-trip).
• Message sets & transmission: two transmission approaches are identified - as part of a general TMS message set or via IVI messages (e.g., ETSI TS 103 301).
• Security provisions: cybersecurity can be provided by conforming to ISO 21177 for secure sessions and authentication.
• Technical annexes: ASN.1 module (Annex A), service announcement example (Annex B), and LDM data objects (Annex C).

Practical Applications and Who Uses It

ISO 24311:2024 is intended for stakeholders involved in urban mobility and C-ITS deployment, including:

• City transport authorities and CZ managers - to publish interoperable CZ definitions and rules.
• Navigation and fleet providers - to implement pre‑trip planning and dynamic rerouting that respects UVARs.
• In‑vehicle system (IVS) and ITS integrators - to consume CZDD data and integrate with the Local Dynamic Map.
• C‑ITS application developers and system architects - to build interoperable message handlers and service announcements.
• Regulators and policy makers - to standardize UVAR communications while leaving enforcement to local regimes.

Use cases include dynamic traveler information, route planning to avoid restricted zones, managing time‑based access rules, and communicating exemptions to authorized vehicles.

Related Standards

• ISO 21217 (ITS station architecture)
• ISO 18750 (Local Dynamic Map)
• ISO 17419 (Globally unique identifiers)
• ISO 22418 (Service Announcement)
• ISO/TS 19321 (IVI data structures)
• ISO 21177 (ITS security services)
• ETSI TS 103 301 (IVI message method)

Keywords: ISO 24311:2024, Controlled Zone, CZDD, UVAR, C‑ITS, geofencing, Local Dynamic Map, in‑vehicle system, CZ manager, ITS security.