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Specialist Task Force 448:
Local Dynamic Map (LDM) Standardisation for vehicle ITS Station

Who we are:

Team Leader: Tatiana Kovacikova, University of Zilina, Slovakia,
Team Members: Yann Garcia, FSCOM, France,
Matthias Mann, PTV, Germany,
Bart Netten, TNO, Netherlands,
Paul Spaanderman, TNO, Netherlands,
Steve Randall, PQM Consultants, UK,

What we do:

This proposed action is made in relation to the EC ICT Standardisation Work Programme 2010 ‑ 2013. The work programme identifies “Intelligent Transport” as a priority domain, for which the ESOs are invited to address standardization needs in the intelligent transport sector, in particular those arising from i2010 Intelligent Car, eSafety and Green Car initiatives, and the Intelligent Transport System (ITS) Action Plan.

In co-operative systems, the Local Dynamic Map (LDM) is a key facility element which will be supporting various Intelligent Transport System (ITS) applications, e.g. several active road safety applications, by providing in real time the relative positions, heading and current states of local ITS stations.

 The purpose of the work is to assure the European wide interoperability between applications using the Local Dynamic Map in Vehicle ITS Stations and in Road Side Unit (RSU) ITS Stations.  It may also contribute to the world wide harmonization by developing the European viewpoint.

 The interoperability shall be seen at two levels:

  • At the communication level between Vehicle ITS Stations and Road Side ITS Stations through the use of common data elements well characterized in terms of quality and security.
  • At the level of an ITS Station between applications and the LDM Management through standardized APIs. This is enabling the development of the LDM and the applications, independently, by different software components providers 

 The proposed action is addressing interoperability issues between Vehicle and Road Side ITS Stations and the openness of the cooperative ITS software market.

The STF 448 is funded under EC/EFTA contract SA/ETSI/EN TR/453/2011-07.

For more details, see our Terms of Reference

Why we do it:

ETSI TC ITS/WG1 has been positioning the LDM as a key function of the ITS station facilities layer.  TC ITS/WG1 has also been working on the standardization of Co-operative Awareness Messages (CAMs) and Decentralized Environmental Notification Messages (DNMs) which have been the support of C2C-CC interoperability demonstrations achieved in October 2008 in Dudenhofen.  CAMs and DNMs will be the main sources of data for the LDM. Moreover, ETSI TC ITS/WG1 has been scoping its work through the definition of a Basic Set of Applications (BSA) which can be realistically deployed in a time frame of about 3 years after the end of their standardization.

 The STF 404 (co-funded under Specific Agreement number SA/ETSI/ENTR/000/2009-13) has produced 10 recommendations for the scoping of LDM (Local Dynamic Map) standardisation in the adopted TR 102 863 – “Vehicular Communications; Basic set of Applications; Local Dynamic Map (LDM); Rationale for and guidance on standardization”.

 TC ITS WG1 has analyzed the 10 recommendations which led to the establishment of the following two standardisation priorities:

  • Development of standard LDM data elements required for the support of the M/453 application set. Focus mainly on dynamic data (Type 3 and Type 4). Take into consideration data quality and security.
  • Development of standard Application Program Interface (API) between the LDM Management and applications developed within M/453. 


Taking into account that the LDM is a common subject of interest for both ETSI and CEN it is proposed to start simultaneously two task forces aiming at developing different but harmonized standards:

  • One ETSI STF focusing on the Vehicle ITS Station and on the applications being considered in WG1, that is to say road safety and Electric Vehicle cooperative ITS.
  • One CEN Project Team focusing on the Road Side ITS Station and on traffic management applications

Both will have to take into account some related other work on the LDM especially the work of ISO TC 204 and the work of ETSI TC ITS WG1 on Common Data Dictionary (DTS/ITS-0010022).

The availability of standard data elements and of standard API will be a strong enabling factor for the deployment of cooperative vehicle and road side units supporting road safety and traffic efficiency management applications which can be developed independently by various suppliers.

How we do it:

The following tasks have been identified for the STF:

Review the applications being proposed in the scope of the M/453 mandate. Identify data elements associated to these applications and the applications definitions, functional and operational requirements.

From this review converge with the CEN Project Team on common standard data elements including quality (accuracy, freshness, confidence level, precision, coverage…etc.) and security features.

Verify that the proposed standard data elements are consistent with the Common data dictionary and other data elements (static type 1 and type 2) developed by ISO TC 204 WG3.

From the applications definitions, functional and operational requirements study their interfaces (interactions) with the local dynamic map management.

From this study derive some standard API comprising some common part and specific parts.

Prepare a draft EN to TC ITS/WG1 with the objective after review and completion to be adopted by ETSI TC ITS for public enquiry.

Support TC ITS in the resolution of public enquiry comments received and assist in the finalisation of the Final Draft EN to be approved by TC ITS to be sent for National Voting.

ETSI TC ITS confirms that all efforts will be taken to accommodate any negative remarks in order to ensure the proper finalisation of the EN.

Outcome of the action will be an ETSI EN for Local Dynamic Map standardization which shall include standard data elements specification and API specification.

The proposed action will be carried out in close cooperation with CEN TC 278 and ISO TC 204 working groups 3, 9 and 18 and will also take into consideration the results of completed EC FP7 projects. It will work closely with the EC project Drive C2X. The cooperation with the field trial project DRIVE C2X is particularly important as it prepares and conducts Field-Operational Tests (FoTs) on cooperative systems and is associated with various national field test projects across Europe, such as SCOREF in France,  simTD in Germany and also in Italy, Spain, Sweden and Finland.


The STF will produce EN 302 895 (DEN/ITS-0010005) Vehicular Communications; Basic Set of Applications; Local Dynamic Map (LDM) Specification.


The STF will also produce an Interim Report and a Final Report for the EC/EFTA:

  • Interim Report to be delivered to EC/EFTA before 31 May 2013
  • Final Report to be delivered to EC/EFTA before 31 December 2013.

Time plan:

1.     Start  work, ToC&Scope July 2012

2.     First draft  for WG1 review December 2012

3.     Stable draft  for WG review April 2013

4.     Interim Report to EC/EFTA May 2013   

5.     Final draft  for WG1 approval August 2013

6.     Final draft for TC ITS approval September 2013

7.     Public Enquiry of EN September 2013

8.     Resolution meeting and approval for voting November 2013

9.  Final report to EC/EFTA December 2013

How to contact us:

STF mail list:

STF leader:


This information is based upon STF working assumptions.
The views expressed do not necessarily represent the position of ETSI in this context.

Last updated: 2012-10-10 14:17:15