Overview
ISO/TR 17424:2015 surveys the state of the art for Local Dynamic Maps (LDMs) within Intelligent Transport Systems (ITS). It reviews LDM architectures, implementations and ongoing standardization, compares prominent LDM approaches to the CEN/ETSI/ISO ITS‑Station architecture, and derives functional, technical and legal requirements for a global LDM concept. The report performs a gap analysis against existing specifications and makes recommendations to standards development organizations (SDOs) and decision bodies without prescribing a single commercial solution.
Key technical topics and requirements
- LDM architecture and subsystems: Describes core subsystems such as LDM management (synchronization, updating, removal of outdated data), data storage, security, content integrity, privacy policy advisor, arbiter/prioritization, Service Access Points (SAPs) and data broker functions.
- Data elements and interfaces: Emphasizes the importance of a common LDM data dictionary and interoperable APIs for writing and retrieving geospatial and status information.
- Multi‑source data handling: Addresses input from vehicle messages (e.g., CAM, DENM), broadcast services (TPEG/TMC), traffic centres (DATEX/DATEX2) and other channels - and the decision rules needed when sources conflict.
- Location referencing and geo‑positioning: Discusses considerations for geo‑location referencing methods and on‑the‑fly vs. table‑based location schemes.
- Security, privacy and integrity: Covers data security mechanisms, data integrity and quality controls, privacy rules for static and dynamic content, and decision logic for conflicting content.
- Synchronization and lifecycle: Looks at LDM synchronization across ITS stations, content lifecycle management and scalability for in‑vehicle, roadside and central systems.
- Standardization gaps: Provides a gap analysis comparing existing specifications and research projects to standardized ITS Station architectures and offers recommendations for harmonization.
Practical applications and users
ISO/TR 17424 is relevant for:
- Vehicle OEMs and Tier‑1 suppliers designing LDM components for connected vehicles (V2V, V2I).
- Road operators, traffic management centres and RSU vendors integrating LDMs for real‑time traffic, hazard notifications and infrastructure coordination.
- Service providers and map/data platform vendors aggregating multimodal sources (TPEG, DATEX/DATEX2, broadcast and cellular feeds).
- Standards bodies, policymakers and researchers assessing interoperability, legal and privacy implications for Cooperative ITS deployments.
Practical uses include cooperative awareness, road hazard warnings, decentralized notification (DENM), route optimization, and multi‑source traffic information fusion.
Related standards
- CEN/ETSI/ISO ITS‑Station architecture (reference comparison for LDM roles)
- ISO/TR 24532 (ITS systems architecture and CORBA use)
- ISO/TS 18234‑1/2 (TPEG service identifiers and AIDs referenced)
- DATEX/DATEX2 (traffic and travel data exchange)
Keywords: Local Dynamic Map, LDM, Intelligent Transport Systems, Cooperative ITS, V2V, V2I, DATEX, TPEG, CAM, DENM, ITS station, data integrity, LDM synchronization.